Changelog history

Versions follow Semantic Versioning (<major>.<minor>.<patch>).

Backward incompatible (breaking) changes will only be introduced in major versions with advance notice in the Deprecations section of releases.

pytest 4.6.11 (2020-06-04)

Bug Fixes

  • #6334: Fix summary entries appearing twice when f/F and s/S report chars were used at the same time in the -r command-line option (for example -rFf).

    The upper case variants were never documented and the preferred form should be the lower case.

  • #7310: Fix UnboundLocalError: local variable 'letter' referenced before assignment in _pytest.terminal.pytest_report_teststatus() when plugins return report objects in an unconventional state.

    This was making pytest_report_teststatus() skip entering if-block branches that declare the letter variable.

    The fix was to set the initial value of the letter before the if-block cascade so that it always has a value.

pytest 4.6.10 (2020-05-08)


  • #6870: New Config.invocation_args attribute containing the unchanged arguments passed to pytest.main().

    Remark: while this is technically a new feature and according to our policy it should not have been backported, we have opened an exception in this particular case because it fixes a serious interaction with pytest-xdist, so it can also be considered a bugfix.

Trivial/Internal Changes

  • #6404: Remove usage of parser module, deprecated in Python 3.9.

pytest 4.6.9 (2020-01-04)

Bug Fixes

  • #6301: Fix assertion rewriting for egg-based distributions and editable installs (pip install --editable).

pytest 4.6.8 (2019-12-19)


  • #5471: JUnit XML now includes a timestamp and hostname in the testsuite tag.

Bug Fixes

  • #5430: junitxml: Logs for failed test are now passed to junit report in case the test fails during call phase.

Trivial/Internal Changes

  • #6345: Pin colorama to 0.4.1 only for Python 3.4 so newer Python versions can still receive colorama updates.

pytest 4.6.7 (2019-12-05)

Bug Fixes

  • #5477: The XML file produced by --junitxml now correctly contain a <testsuites> root element.
  • #6044: Properly ignore FileNotFoundError (OSError.errno == NOENT in Python 2) exceptions when trying to remove old temporary directories, for instance when multiple processes try to remove the same directory (common with pytest-xdist for example).

pytest 4.6.6 (2019-10-11)

Bug Fixes

  • #5523: Fixed using multiple short options together in the command-line (for example -vs) in Python 3.8+.
  • #5537: Replace importlib_metadata backport with importlib.metadata from the standard library on Python 3.8+.
  • #5806: Fix “lexer” being used when uploading to from --pastebin to “text”.
  • #5902: Fix warnings about deprecated cmp attribute in attrs>=19.2.

Trivial/Internal Changes

  • #5801: Fixes python version checks (detected by flake8-2020) in case python4 becomes a thing.

pytest 4.6.5 (2019-08-05)

Bug Fixes

  • #4344: Fix RuntimeError/StopIteration when trying to collect package with “” only.
  • #5478: Fix encode error when using unicode strings in exceptions with pytest.raises.
  • #5524: Fix issue where tmp_path and tmpdir would not remove directories containing files marked as read-only, which could lead to pytest crashing when executed a second time with the --basetemp option.
  • #5547: --step-wise now handles xfail(strict=True) markers properly.
  • #5650: Improved output when parsing an ini configuration file fails.

pytest 4.6.4 (2019-06-28)

Bug Fixes

  • #5404: Emit a warning when attempting to unwrap a broken object raises an exception, for easier debugging (#5080).
  • #5444: Fix --stepwise mode when the first file passed on the command-line fails to collect.
  • #5482: Fix bug introduced in 4.6.0 causing collection errors when passing more than 2 positional arguments to pytest.mark.parametrize.
  • #5505: Fix crash when discovery fails while using -p no:terminal.

pytest 4.6.3 (2019-06-11)

Bug Fixes

  • #5383: -q has again an impact on the style of the collected items (--collect-only) when --log-cli-level is used.
  • #5389: Fix regressions of #5063 for importlib_metadata.PathDistribution which have their files attribute being None.
  • #5390: Fix regression where the obj attribute of TestCase items was no longer bound to methods.

pytest 4.6.2 (2019-06-03)

Bug Fixes

  • #5370: Revert unrolling of all() to fix NameError on nested comprehensions.
  • #5371: Revert unrolling of all() to fix incorrect handling of generators with if.
  • #5372: Revert unrolling of all() to fix incorrect assertion when using all() in an expression.

pytest 4.6.1 (2019-06-02)

Bug Fixes

  • #5354: Fix pytest.mark.parametrize when the argvalues is an iterator.
  • #5358: Fix assertion rewriting of all() calls to deal with non-generators.

pytest 4.6.0 (2019-05-31)


The 4.6.X series will be the last series to support Python 2 and Python 3.4.

For more details, see our Python 2.7 and 3.4 support plan.


  • #4559: Added the junit_log_passing_tests ini value which can be used to enable or disable logging of passing test output in the Junit XML file.
  • #4956: pytester’s testdir.spawn uses tmpdir as HOME/USERPROFILE directory.
  • #5062: Unroll calls to all to full for-loops with assertion rewriting for better failure messages, especially when using Generator Expressions.
  • #5063: Switch from pkg_resources to importlib-metadata for entrypoint detection for improved performance and import time.
  • #5091: The output for ini options in --help has been improved.
  • #5269: pytest.importorskip includes the ImportError now in the default reason.
  • #5311: Captured logs that are output for each failing test are formatted using the ColoredLevelFormatter.
  • #5312: Improved formatting of multiline log messages in Python 3.

Bug Fixes

  • #2064: The debugging plugin imports the wrapped Pdb class (--pdbcls) on-demand now.
  • #4908: The pytest_enter_pdb hook gets called with post-mortem (--pdb).
  • #5036: Fix issue where fixtures dependent on other parametrized fixtures would be erroneously parametrized.
  • #5256: Handle internal error due to a lone surrogate unicode character not being representable in Jython.
  • #5257: Ensure that sys.stdout.mode does not include 'b' as it is a text stream.
  • #5278: Pytest’s internal python plugin can be disabled using -p no:python again.
  • #5286: Fix issue with disable_test_id_escaping_and_forfeit_all_rights_to_community_support option not working when using a list of test IDs in parametrized tests.
  • #5330: Show the test module being collected when emitting PytestCollectionWarning messages for test classes with __init__ and __new__ methods to make it easier to pin down the problem.
  • #5333: Fix regression in 4.5.0 with --lf not re-running all tests with known failures from non-selected tests.

Improved Documentation

  • #5250: Expand docs on use of setenv and delenv with monkeypatch.

pytest 4.5.0 (2019-05-11)


  • #4826: A warning is now emitted when unknown marks are used as a decorator. This is often due to a typo, which can lead to silently broken tests.

  • #4907: Show XFail reason as part of JUnitXML message field.

  • #5013: Messages from crash reports are displayed within test summaries now, truncated to the terminal width.

  • #5023: New flag --strict-markers that triggers an error when unknown markers (e.g. those not registered using the markers option in the configuration file) are used in the test suite.

    The existing --strict option has the same behavior currently, but can be augmented in the future for additional checks.

  • #5026: Assertion failure messages for sequences and dicts contain the number of different items now.

  • #5034: Improve reporting with --lf and --ff (run-last-failure).

  • #5035: The --cache-show option/action accepts an optional glob to show only matching cache entries.

  • #5059: Standard input (stdin) can be given to pytester’s and Testdir.popen().

  • #5068: The -r option learnt about A to display all reports (including passed ones) in the short test summary.

  • #5108: The short test summary is displayed after passes with output (-rP).

  • #5172: The --last-failed (--lf) option got smarter and will now skip entire files if all tests of that test file have passed in previous runs, greatly speeding up collection.

  • #5177: Introduce new specific warning PytestWarning subclasses to make it easier to filter warnings based on the class, rather than on the message. The new subclasses are:

    • PytestAssertRewriteWarning
    • PytestCacheWarning
    • PytestCollectionWarning
    • PytestConfigWarning
    • PytestUnhandledCoroutineWarning
    • PytestUnknownMarkWarning
  • #5202: New record_testsuite_property session-scoped fixture allows users to log <property> tags at the testsuite level with the junitxml plugin.

    The generated XML is compatible with the latest xunit standard, contrary to the properties recorded by record_property and record_xml_attribute.

  • #5214: The default logging format has been changed to improve readability. Here is an example of a previous logging message:    3 CRITICAL critical message logged by test

    This has now become:

    CRITICAL critical message logged by test

    The formatting can be changed through the log_format configuration option.

  • #5220: --fixtures now also shows fixture scope for scopes other than "function".

Bug Fixes

  • #5113: Deselected items from plugins using pytest_collect_modifyitems as a hookwrapper are correctly reported now.
  • #5144: With usage errors exitstatus is set to EXIT_USAGEERROR in the pytest_sessionfinish hook now as expected.
  • #5235: outcome.exit is not used with EOF in the pdb wrapper anymore, but only with quit.

Improved Documentation

  • #4935: Expand docs on registering marks and the effect of --strict.

Trivial/Internal Changes

  • #4942: logging.raiseExceptions is not set to False anymore.
  • #5013: pytest now depends on wcwidth to properly track unicode character sizes for more precise terminal output.
  • #5059: pytester’s Testdir.popen() uses stdout and stderr via keyword arguments with defaults now (subprocess.PIPE).
  • #5069: The code for the short test summary in the terminal was moved to the terminal plugin.
  • #5082: Improved validation of kwargs for various methods in the pytester plugin.
  • #5202: record_property now emits a PytestWarning when used with junit_family=xunit2: the fixture generates property tags as children of testcase, which is not permitted according to the most recent schema.
  • #5239: Pin pluggy to < 1.0 so we don’t update to 1.0 automatically when it gets released: there are planned breaking changes, and we want to ensure pytest properly supports pluggy 1.0.

pytest 4.4.2 (2019-05-08)

Bug Fixes

  • #5089: Fix crash caused by error in __repr__ function with both showlocals and verbose output enabled.
  • #5139: Eliminate core dependency on ‘terminal’ plugin.
  • #5229: Require pluggy>=0.11.0 which reverts a dependency to importlib-metadata added in 0.10.0. The importlib-metadata package cannot be imported when installed as an egg and causes issues when relying on to install test dependencies.

Improved Documentation

  • #5171: Doc: pytest_ignore_collect, pytest_collect_directory, pytest_collect_file and pytest_pycollect_makemodule hooks’s ‘path’ parameter documented type is now py.path.local
  • #5188: Improve help for --runxfail flag.

Trivial/Internal Changes

  • #5182: Removed internal and unused _pytest.deprecated.MARK_INFO_ATTRIBUTE.

pytest 4.4.1 (2019-04-15)

Bug Fixes

  • #5031: Environment variables are properly restored when using pytester’s testdir fixture.
  • #5039: Fix regression with --pdbcls, which stopped working with local modules in 4.0.0.
  • #5092: Produce a warning when unknown keywords are passed to pytest.param(...).
  • #5098: Invalidate import caches with monkeypatch.syspath_prepend, which is required with namespace packages being used.

pytest 4.4.0 (2019-03-29)


  • #2224: async test functions are skipped and a warning is emitted when a suitable async plugin is not installed (such as pytest-asyncio or pytest-trio).

    Previously async functions would not execute at all but still be marked as “passed”.

  • #2482: Include new disable_test_id_escaping_and_forfeit_all_rights_to_community_support option to disable ascii-escaping in parametrized values. This may cause a series of problems and as the name makes clear, use at your own risk.

  • #4718: The -p option can now be used to early-load plugins also by entry-point name, instead of just by module name.

    This makes it possible to early load external plugins like pytest-cov in the command-line:

    pytest -p pytest_cov
  • #4855: The --pdbcls option handles classes via module attributes now (e.g. pdb:pdb.Pdb with pdb++), and its validation was improved.

  • #4875: The testpaths configuration option is now displayed next to the rootdir and inifile lines in the pytest header if the option is in effect, i.e., directories or file names were not explicitly passed in the command line.

    Also, inifile is only displayed if there’s a configuration file, instead of an empty inifile: string.

  • #4911: Doctests can be skipped now dynamically using pytest.skip().

  • #4920: Internal refactorings have been made in order to make the implementation of the pytest-subtests plugin possible, which adds unittest sub-test support and a new subtests fixture as discussed in #1367.

    For details on the internal refactorings, please see the details on the related PR.

  • #4931: pytester’s LineMatcher asserts that the passed lines are a sequence.

  • #4936: Handle -p plug after -p no:plug.

    This can be used to override a blocked plugin (e.g. in “addopts”) from the command line etc.

  • #4951: Output capturing is handled correctly when only capturing via fixtures (capsys, capfs) with pdb.set_trace().

  • #4956: pytester sets $HOME and $USERPROFILE to the temporary directory during test runs.

    This ensures to not load configuration files from the real user’s home directory.

  • #4980: Namespace packages are handled better with monkeypatch.syspath_prepend and testdir.syspathinsert (via pkg_resources.fixup_namespace_packages).

  • #4993: The stepwise plugin reports status information now.

  • #5008: If a setup.cfg file contains [tool:pytest] and also the no longer supported [pytest] section, pytest will use [tool:pytest] ignoring [pytest]. Previously it would unconditionally error out.

    This makes it simpler for plugins to support old pytest versions.

Bug Fixes

  • #1895: Fix bug where fixtures requested dynamically via request.getfixturevalue() might be teardown before the requesting fixture.

  • #4851: pytester unsets PYTEST_ADDOPTS now to not use outer options with testdir.runpytest().

  • #4903: Use the correct modified time for years after 2038 in rewritten .pyc files.

  • #4928: Fix line offsets with ScopeMismatch errors.

  • #4957: -p no:plugin is handled correctly for default (internal) plugins now, e.g. with -p no:capture.

    Previously they were loaded (imported) always, making e.g. the capfd fixture available.

  • #4968: The pdb quit command is handled properly when used after the debug command with pdb++.

  • #4975: Fix the interpretation of -qq option where it was being considered as -v instead.

  • #4978: outcomes.Exit is not swallowed in assertrepr_compare anymore.

  • #4988: Close logging’s file handler explicitly when the session finishes.

  • #5003: Fix line offset with mark collection error (off by one).

Improved Documentation

  • #4974: Update docs for pytest_cmdline_parse hook to note availability liminations

Trivial/Internal Changes

  • #4718: pluggy>=0.9 is now required.

  • #4815: funcsigs>=1.0 is now required for Python 2.7.

  • #4829: Some left-over internal code related to yield tests has been removed.

  • #4890: Remove internally unused anypython fixture from the pytester plugin.

  • #4912: Remove deprecated Sphinx directive, add_description_unit(), pin sphinx-removed-in to >= 0.2.0 to support Sphinx 2.0.

  • #4913: Fix pytest tests invocation with custom PYTHONPATH.

  • #4965: New pytest_report_to_serializable and pytest_report_from_serializable experimental hooks.

    These hooks will be used by pytest-xdist, pytest-subtests, and the replacement for resultlog to serialize and customize reports.

    They are experimental, meaning that their details might change or even be removed completely in future patch releases without warning.

    Feedback is welcome from plugin authors and users alike.

  • #4987: Collector.repr_failure respects the --tb option, but only defaults to short now (with auto).

pytest 4.3.1 (2019-03-11)

Bug Fixes

  • #4810: Logging messages inside pytest_runtest_logreport() are now properly captured and displayed.
  • #4861: Improve validation of contents written to captured output so it behaves the same as when capture is disabled.
  • #4898: Fix AttributeError: FixtureRequest has no 'confg' attribute bug in testdir.copy_example.

Trivial/Internal Changes

  • #4768: Avoid pkg_resources import at the top-level.

pytest 4.3.0 (2019-02-16)


  • #4724: pytest.warns() now emits a warning when it receives unknown keyword arguments.

    This will be changed into an error in the future.


  • #2753: Usage errors from argparse are mapped to pytest’s UsageError.

  • #3711: Add the --ignore-glob parameter to exclude test-modules with Unix shell-style wildcards. Add the collect_ignore_glob for to exclude test-modules with Unix shell-style wildcards.

  • #4698: The warning about Python 2.7 and 3.4 not being supported in pytest 5.0 has been removed.

    In the end it was considered to be more of a nuisance than actual utility and users of those Python versions shouldn’t have problems as pip will not install pytest 5.0 on those interpreters.

  • #4707: With the help of new set_log_path() method there is a way to set log_file paths from hooks.

Bug Fixes

  • #4651: --help and --version are handled with UsageError.
  • #4782: Fix AssertionError with collection of broken symlinks with packages.

pytest 4.2.1 (2019-02-12)

Bug Fixes

  • #2895: The pytest_report_collectionfinish hook now is also called with --collect-only.
  • #3899: Do not raise UsageError when an imported package has a child module.
  • #4347: Fix output capturing when using pdb++ with recursive debugging.
  • #4592: Fix handling of collect_ignore via parent
  • #4700: Fix regression where setUpClass would always be called in subclasses even if all tests were skipped by a unittest.skip() decorator applied in the subclass.
  • #4739: Fix parametrize(... ids=<function>) when the function returns non-strings.
  • #4745: Fix/improve collection of args when passing in and a test file.
  • #4770: more_itertools is now constrained to <6.0.0 when required for Python 2.7 compatibility.
  • #526: Fix “ValueError: Plugin already registered” exceptions when running in build directories that symlink to actual source.

Improved Documentation

  • #3899: Add note to plugins.rst that pytest_plugins should not be used as a name for a user module containing plugins.
  • #4324: Document how to use raises and does_not_raise to write parametrized tests with conditional raises.
  • #4709: Document how to customize test failure messages when using pytest.warns.

Trivial/Internal Changes

  • #4741: Some verbosity related attributes of the TerminalReporter plugin are now read only properties.

pytest 4.2.0 (2019-01-30)


  • #3094: Classic xunit-style functions and methods now obey the scope of autouse fixtures.

    This fixes a number of surprising issues like setup_method being called before session-scoped autouse fixtures (see #517 for an example).

  • #4627: Display a message at the end of the test session when running under Python 2.7 and 3.4 that pytest 5.0 will no longer support those Python versions.

  • #4660: The number of selected tests now are also displayed when the -k or -m flags are used.

  • #4688: pytest_report_teststatus hook now can also receive a config parameter.

  • #4691: pytest_terminal_summary hook now can also receive a config parameter.

Bug Fixes

  • #3547: --junitxml can emit XML compatible with Jenkins xUnit. junit_family INI option accepts legacy|xunit1, which produces old style output, and xunit2 that conforms more strictly to

  • #4280: Improve quitting from pdb, especially with --trace.

    Using q[quit] after pdb.set_trace() will quit pytest also.

  • #4402: Warning summary now groups warnings by message instead of by test id.

    This makes the output more compact and better conveys the general idea of how much code is actually generating warnings, instead of how many tests call that code.

  • #4536: monkeypatch.delattr handles class descriptors like staticmethod/classmethod.

  • #4649: Restore marks being considered keywords for keyword expressions.

  • #4653: tmp_path fixture and other related ones provides resolved path (a.k.a real path)

  • #4667: pytest_terminal_summary uses result from pytest_report_teststatus hook, rather than hardcoded strings.

  • #4669: Correctly handle unittest.SkipTest exception containing non-ascii characters on Python 2.

  • #4680: Ensure the tmpdir and the tmp_path fixtures are the same folder.

  • #4681: Ensure tmp_path is always a real path.

Trivial/Internal Changes

  • #4643: Use a.item() instead of the deprecated np.asscalar(a) in pytest.approx.

    np.asscalar has been deprecated in numpy 1.16..

  • #4657: Copy saferepr from pylib

  • #4668: The verbose word for expected failures in the teststatus report changes from xfail to XFAIL to be consistent with other test outcomes.

pytest 4.1.1 (2019-01-12)

Bug Fixes

  • #2256: Show full repr with assert a==b and -vv.
  • #3456: Extend Doctest-modules to ignore mock objects.
  • #4617: Fixed pytest.warns bug when context manager is reused (e.g. multiple parametrization).
  • #4631: Don’t rewrite assertion when __getattr__ is broken

Improved Documentation

  • #3375: Document that using setup.cfg may crash other tools or cause hard to track down problems because it uses a different parser than pytest.ini or tox.ini files.

Trivial/Internal Changes

  • #4602: Uninstall hypothesis in regen tox env.

pytest 4.1.0 (2019-01-05)


  • #2169: pytest.mark.parametrize: in previous versions, errors raised by id functions were suppressed and changed into warnings. Now the exceptions are propagated, along with a pytest message informing the node, parameter value and index where the exception occurred.

  • #3078: Remove legacy internal warnings system: config.warn, Node.warn. The pytest_logwarning now issues a warning when implemented.

    See our docs on information on how to update your code.

  • #3079: Removed support for yield tests - they are fundamentally broken because they don’t support fixtures properly since collection and test execution were separated.

    See our docs on information on how to update your code.

  • #3082: Removed support for applying marks directly to values in @pytest.mark.parametrize. Use pytest.param instead.

    See our docs on information on how to update your code.

  • #3083: Removed Metafunc.addcall. This was the predecessor mechanism to @pytest.mark.parametrize.

    See our docs on information on how to update your code.

  • #3085: Removed support for passing strings to pytest.main. Now, always pass a list of strings instead.

    See our docs on information on how to update your code.

  • #3086: [pytest] section in setup.cfg files is no longer supported, use [tool:pytest] instead. setup.cfg files are meant for use with distutils, and a section named pytest has notoriously been a source of conflicts and bugs.

    Note that for pytest.ini and tox.ini files the section remains [pytest].

  • #3616: Removed the deprecated compat properties for node.Class/Function/Module - use pytest.Class/Function/Module now.

    See our docs on information on how to update your code.

  • #4421: Removed the implementation of the pytest_namespace hook.

    See our docs on information on how to update your code.

  • #4489: Removed request.cached_setup. This was the predecessor mechanism to modern fixtures.

    See our docs on information on how to update your code.

  • #4535: Removed the deprecated PyCollector.makeitem method. This method was made public by mistake a long time ago.

  • #4543: Removed support to define fixtures using the pytest_funcarg__ prefix. Use the @pytest.fixture decorator instead.

    See our docs on information on how to update your code.

  • #4545: Calling fixtures directly is now always an error instead of a warning.

    See our docs on information on how to update your code.

  • #4546: Remove Node.get_marker(name) the return value was not usable for more than a existence check.

    Use Node.get_closest_marker(name) as a replacement.

  • #4547: The deprecated record_xml_property fixture has been removed, use the more generic record_property instead.

    See our docs for more information.

  • #4548: An error is now raised if the pytest_plugins variable is defined in a non-top-level file (i.e., not residing in the rootdir).

    See our docs for more information.

  • #891: Remove testfunction.markername attributes - use Node.iter_markers(name=None) to iterate them.



  • #3191: A warning is now issued when assertions are made for None.

    This is a common source of confusion among new users, which write:

    assert mocked_object.assert_called_with(3, 4, 5, key="value")

    When they should write:

    mocked_object.assert_called_with(3, 4, 5, key="value")

    Because the assert_called_with method of mock objects already executes an assertion.

    This warning will not be issued when None is explicitly checked. An assertion like:

    assert variable is None

    will not issue the warning.

  • #3632: Richer equality comparison introspection on AssertionError for objects created using attrs or dataclasses (Python 3.7+, backported to 3.6).

  • #4278: CACHEDIR.TAG files are now created inside cache directories.

    Those files are part of the Cache Directory Tagging Standard, and can be used by backup or synchronization programs to identify pytest’s cache directory as such.

  • #4292: pytest.outcomes.Exit is derived from SystemExit instead of KeyboardInterrupt. This allows us to better handle pdb exiting.

  • #4371: Updated the --collect-only option to display test descriptions when ran using --verbose.

  • #4386: Restructured ExceptionInfo object construction and ensure incomplete instances have a repr/str.

  • #4416: pdb: added support for keyword arguments with pdb.set_trace.

    It handles header similar to Python 3.7 does it, and forwards any other keyword arguments to the Pdb constructor.

    This allows for __import__("pdb").set_trace(skip=["foo.*"]).

  • #4483: Added ini parameter junit_duration_report to optionally report test call durations, excluding setup and teardown times.

    The JUnit XML specification and the default pytest behavior is to include setup and teardown times in the test duration report. You can include just the call durations instead (excluding setup and teardown) by adding this to your pytest.ini file:

    junit_duration_report = call
  • #4532: -ra now will show errors and failures last, instead of as the first items in the summary.

    This makes it easier to obtain a list of errors and failures to run tests selectively.

  • #4599: pytest.importorskip now supports a reason parameter, which will be shown when the requested module cannot be imported.

Bug Fixes

  • #3532: -p now accepts its argument without a space between the value, for example -pmyplugin.
  • #4327: approx again works with more generic containers, more precisely instances of Iterable and Sized instead of more restrictive Sequence.
  • #4397: Ensure that node ids are printable.
  • #4435: Fixed raises(..., 'code(string)') frame filename.
  • #4458: Display actual test ids in --collect-only.

Improved Documentation

  • #4557: Markers example documentation page updated to support latest pytest version.
  • #4558: Update cache documentation example to correctly show cache hit and miss.
  • #4580: Improved detailed summary report documentation.

Trivial/Internal Changes

  • #4447: Changed the deprecation type of --result-log to PytestDeprecationWarning.

    It was decided to remove this feature at the next major revision.

pytest 4.0.2 (2018-12-13)

Bug Fixes

  • #4265: Validate arguments from the PYTEST_ADDOPTS environment variable and the addopts ini option separately.
  • #4435: Fix raises(..., 'code(string)') frame filename.
  • #4500: When a fixture yields and a log call is made after the test runs, and, if the test is interrupted, capture attributes are None.
  • #4538: Raise TypeError for with raises(..., match=<non-None falsey value>).

Improved Documentation

  • #1495: Document common doctest fixture directory tree structure pitfalls

pytest 4.0.1 (2018-11-23)

Bug Fixes

  • #3952: Display warnings before “short test summary info” again, but still later warnings in the end.
  • #4386: Handle uninitialized exceptioninfo in repr/str.
  • #4393: Do not create .gitignore/ files in existing cache directories.
  • #4400: Rearrange warning handling for the yield test errors so the opt-out in 4.0.x correctly works.
  • #4405: Fix collection of testpaths with --pyargs.
  • #4412: Fix assertion rewriting involving Starred + side-effects.
  • #4425: Ensure we resolve the absolute path when the given --basetemp is a relative path.

Trivial/Internal Changes

  • #4315: Use pkg_resources.parse_version instead of LooseVersion in minversion check.
  • #4440: Adjust the stack level of some internal pytest warnings.

pytest 4.0.0 (2018-11-13)


  • #3737: RemovedInPytest4Warnings are now errors by default.

    Following our plan to remove deprecated features with as little disruption as possible, all warnings of type RemovedInPytest4Warnings now generate errors instead of warning messages.

    The affected features will be effectively removed in pytest 4.1, so please consult the Deprecations and Removals section in the docs for directions on how to update existing code.

    In the pytest 4.0.X series, it is possible to change the errors back into warnings as a stop gap measure by adding this to your pytest.ini file:

    filterwarnings =

    But this will stop working when pytest 4.1 is released.

    If you have concerns about the removal of a specific feature, please add a comment to #4348.

  • #4358: Remove the ::() notation to denote a test class instance in node ids.

    Previously, node ids that contain test instances would use ::() to denote the instance like this:

    The extra ::() was puzzling to most users and has been removed, so that the test id becomes now:

    This change could not accompany a deprecation period as is usual when user-facing functionality changes because it was not really possible to detect when the functionality was being used explicitly.

    The extra ::() might have been removed in some places internally already, which then led to confusion in places where it was expected, e.g. with --deselect (#4127).

    Test class instances are also not listed with --collect-only anymore.


  • #4270: The cache_dir option uses $TOX_ENV_DIR as prefix (if set in the environment).

    This uses a different cache per tox environment by default.

Bug Fixes

  • #3554: Fix CallInfo.__repr__ for when the call is not finished yet.

pytest 3.10.1 (2018-11-11)

Bug Fixes

  • #4287: Fix nested usage of debugging plugin (pdb), e.g. with pytester’s testdir.runpytest.
  • #4304: Block the stepwise plugin if cacheprovider is also blocked, as one depends on the other.
  • #4306: Parse minversion as an actual version and not as dot-separated strings.
  • #4310: Fix duplicate collection due to multiple args matching the same packages.
  • #4321: Fix item.nodeid with resolved symlinks.
  • #4325: Fix collection of direct symlinked files, where the target does not match python_files.
  • #4329: Fix TypeError in report_collect with _collect_report_last_write.

Trivial/Internal Changes

  • #4305: Replace byte/unicode helpers in test_capture with python level syntax.

pytest 3.10.0 (2018-11-03)


  • #2619: Resume capturing output after continue with __import__("pdb").set_trace().

    This also adds a new pytest_leave_pdb hook, and passes in pdb to the existing pytest_enter_pdb hook.

  • #4147: Add --sw, --stepwise as an alternative to --lf -x for stopping at the first failure, but starting the next test invocation from that test. See the documentation for more info.

  • #4188: Make --color emit colorful dots when not running in verbose mode. Earlier, it would only colorize the test-by-test output if --verbose was also passed.

  • #4225: Improve performance with collection reporting in non-quiet mode with terminals.

    The “collecting …” message is only printed/updated every 0.5s.

Bug Fixes

  • #2701: Fix false RemovedInPytest4Warning: usage of Session... is deprecated, please use pytest warnings.
  • #4046: Fix problems with running tests in package files.
  • #4260: Swallow warnings during anonymous compilation of source.
  • #4262: Fix access denied error when deleting stale directories created by tmpdir / tmp_path.
  • #611: Naming a fixture request will now raise a warning: the request fixture is internal and should not be overwritten as it will lead to internal errors.
  • #4266: Handle (ignore) exceptions raised during collection, e.g. with Django’s LazySettings proxy class.

Improved Documentation

  • #4255: Added missing documentation about the fact that module names passed to filter warnings are not regex-escaped.

Trivial/Internal Changes

  • #4272: Display cachedir also in non-verbose mode if non-default.

  • #4277: pdb: improve message about output capturing with set_trace.

    Do not display “IO-capturing turned off/on” when -s is used to avoid confusion.

  • #4279: Improve message and stack level of warnings issued by monkeypatch.setenv when the value of the environment variable is not a str.

pytest 3.9.3 (2018-10-27)

Bug Fixes

  • #4174: Fix “ValueError: Plugin already registered” with conftest plugins via symlink.
  • #4181: Handle race condition between creation and deletion of temporary folders.
  • #4221: Fix bug where the warning summary at the end of the test session was not showing the test where the warning was originated.
  • #4243: Fix regression when stacklevel for warnings was passed as positional argument on python2.

Improved Documentation

  • #3851: Add reference to empty_parameter_set_mark ini option in documentation of @pytest.mark.parametrize

Trivial/Internal Changes

  • #4028: Revert patching of sys.breakpointhook since it appears to do nothing.
  • #4233: Apply an import sorter (reorder-python-imports) to the codebase.
  • #4248: Remove use of unnecessary compat shim, six.binary_type

pytest 3.9.2 (2018-10-22)

Bug Fixes

  • #2909: Improve error message when a recursive dependency between fixtures is detected.
  • #3340: Fix logging messages not shown in hooks pytest_sessionstart() and pytest_sessionfinish().
  • #3533: Fix unescaped XML raw objects in JUnit report for skipped tests
  • #3691: Python 2: safely format warning message about passing unicode strings to warnings.warn, which may cause surprising MemoryError exception when monkey patching warnings.warn itself.
  • #4026: Improve error message when it is not possible to determine a function’s signature.
  • #4177: Pin setuptools>=40.0 to support py_modules in setup.cfg
  • #4179: Restore the tmpdir behaviour of symlinking the current test run.
  • #4192: Fix filename reported by warnings.warn when using recwarn under python2.

pytest 3.9.1 (2018-10-16)


  • #4159: For test-suites containing test classes, the information about the subclassed module is now output only if a higher verbosity level is specified (at least “-vv”).

pytest 3.9.0 (2018-10-15 - not published due to a release automation bug)


  • #3616: The following accesses have been documented as deprecated for years, but are now actually emitting deprecation warnings.

    • Access of Module, Function, Class, Instance, File and Item through Node instances. Now users will this warning:

      usage of Function.Module is deprecated, please use pytest.Module instead

      Users should just import pytest and access those objects using the pytest module.

    • request.cached_setup, this was the precursor of the setup/teardown mechanism available to fixtures. You can consult funcarg comparison section in the docs.

    • Using objects named "Class" as a way to customize the type of nodes that are collected in Collector subclasses has been deprecated. Users instead should use pytest_collect_make_item to customize node types during collection.

      This issue should affect only advanced plugins who create new collection types, so if you see this warning message please contact the authors so they can change the code.

    • The warning that produces the message below has changed to RemovedInPytest4Warning:

      getfuncargvalue is deprecated, use getfixturevalue
  • #3988: Add a Deprecation warning for pytest.ensuretemp as it was deprecated since a while.


  • #2293: Improve usage errors messages by hiding internal details which can be distracting and noisy.

    This has the side effect that some error conditions that previously raised generic errors (such as ValueError for unregistered marks) are now raising Failed exceptions.

  • #3332: Improve the error displayed when a file could not be imported.

    In order to implement this, a new chain parameter was added to ExceptionInfo.getrepr to show or hide chained tracebacks in Python 3 (defaults to True).

  • #3849: Add empty_parameter_set_mark=fail_at_collect ini option for raising an exception when parametrize collects an empty set.

  • #3964: Log messages generated in the collection phase are shown when live-logging is enabled and/or when they are logged to a file.

  • #3985: Introduce tmp_path as a fixture providing a Path object.

  • #4013: Deprecation warnings are now shown even if you customize the warnings filters yourself. In the previous version any customization would override pytest’s filters and deprecation warnings would fall back to being hidden by default.

  • #4073: Allow specification of timeout for Testdir.runpytest_subprocess() and

  • #4098: Add returncode argument to pytest.exit() to exit pytest with a specific return code.

  • #4102: Reimplement pytest.deprecated_call using pytest.warns so it supports the match='...' keyword argument.

    This has the side effect that pytest.deprecated_call now raises instead of AssertionError.

  • #4149: Require setuptools>=30.3 and move most of the metadata to setup.cfg.

Bug Fixes

  • #2535: Improve error message when test functions of unittest.TestCase subclasses use a parametrized fixture.

  • #3057: request.fixturenames now correctly returns the name of fixtures created by request.getfixturevalue().

  • #3946: Warning filters passed as command line options using -W now take precedence over filters defined in ini configuration files.

  • #4066: Fix source reindenting by using textwrap.dedent directly.

  • #4102: pytest.warn will capture previously-warned warnings in Python 2. Previously they were never raised.

  • #4108: Resolve symbolic links for args.

    This fixes running pytest tests/, where tests is a symlink to project/app/tests: previously project/app/ would be ignored for fixtures then.

  • #4132: Fix duplicate printing of internal errors when using --pdb.

  • #4135: pathlib based tmpdir cleanup now correctly handles symlinks in the folder.

  • #4152: Display the filename when encountering SyntaxWarning.

Improved Documentation

  • #3713: Update usefixtures documentation to clarify that it can’t be used with fixture functions.
  • #4058: Update fixture documentation to specify that a fixture can be invoked twice in the scope it’s defined for.
  • #4064: According to unittest.rst, setUpModule and tearDownModule were not implemented, but it turns out they are. So updated the documentation for unittest.
  • #4151: Add tempir testing example to CONTRIBUTING.rst guide

Trivial/Internal Changes

  • #2293: The internal MarkerError exception has been removed.
  • #3988: Port the implementation of tmpdir to pathlib.
  • #4063: Exclude 0.00 second entries from --duration output unless -vv is passed on the command-line.
  • #4093: Fixed formatting of string literals in internal tests.

pytest 3.8.2 (2018-10-02)

Deprecations and Removals

  • #4036: The item parameter of pytest_warning_captured hook is now documented as deprecated. We realized only after the 3.8 release that this parameter is incompatible with pytest-xdist.

    Our policy is to not deprecate features during bugfix releases, but in this case we believe it makes sense as we are only documenting it as deprecated, without issuing warnings which might potentially break test suites. This will get the word out that hook implementers should not use this parameter at all.

    In a future release item will always be None and will emit a proper warning when a hook implementation makes use of it.

Bug Fixes

  • #3539: Fix reload on assertion rewritten modules.

  • #4034: The .user_properties attribute of TestReport objects is a list of (name, value) tuples, but could sometimes be instantiated as a tuple of tuples. It is now always a list.

  • #4039: No longer issue warnings about using pytest_plugins in non-top-level directories when using --pyargs: the current --pyargs mechanism is not reliable and might give false negatives.

  • #4040: Exclude empty reports for passed tests when -rP option is used.

  • #4051: Improve error message when an invalid Python expression is passed to the -m option.

  • #4056: MonkeyPatch.setenv and MonkeyPatch.delenv issue a warning if the environment variable name is not str on Python 2.

    In Python 2, adding unicode keys to os.environ causes problems with subprocess (and possible other modules), making this a subtle bug specially susceptible when used with from __future__ import unicode_literals.

Improved Documentation

  • #3928: Add possible values for fixture scope to docs.

pytest 3.8.1 (2018-09-22)

Bug Fixes

  • #3286: .pytest_cache directory is now automatically ignored by Git. Users who would like to contribute a solution for other SCMs please consult/comment on this issue.

  • #3749: Fix the following error during collection of tests inside packages:

    TypeError: object of type 'Package' has no len()
  • #3941: Fix bug where indirect parametrization would consider the scope of all fixtures used by the test function to determine the parametrization scope, and not only the scope of the fixtures being parametrized.

  • #3973: Fix crash of the assertion rewriter if a test changed the current working directory without restoring it afterwards.

  • #3998: Fix issue that prevented some caplog properties (for example record_tuples) from being available when entering the debugger with --pdb.

  • #3999: Fix UnicodeDecodeError in python2.x when a class returns a non-ascii binary __repr__ in an assertion which also contains non-ascii text.

Improved Documentation

  • #3996: New Deprecations and Removals page shows all currently deprecated features, the rationale to do so, and alternatives to update your code. It also list features removed from pytest in past major releases to help those with ancient pytest versions to upgrade.

Trivial/Internal Changes

  • #3955: Improve pre-commit detection for changelog filenames
  • #3975: Remove legacy code around im_func as that was python2 only

pytest 3.8.0 (2018-09-05)

Deprecations and Removals

  • #2452: Config.warn and Node.warn have been deprecated, see for rationale and examples.

  • #3936: @pytest.mark.filterwarnings second parameter is no longer regex-escaped, making it possible to actually use regular expressions to check the warning message.

    Note: regex-escaping the match string was an implementation oversight that might break test suites which depend on the old behavior.


  • #2452: Internal pytest warnings are now issued using the standard warnings module, making it possible to use the standard warnings filters to manage those warnings. This introduces PytestWarning, PytestDeprecationWarning and RemovedInPytest4Warning warning types as part of the public API.

    Consult the documentation for more info.

  • #2908: DeprecationWarning and PendingDeprecationWarning are now shown by default if no other warning filter is configured. This makes pytest more compliant with PEP-0506. See the docs for more info.

  • #3251: Warnings are now captured and displayed during test collection.

  • #3784: PYTEST_DISABLE_PLUGIN_AUTOLOAD environment variable disables plugin auto-loading when set.

  • #3829: Added the count option to console_output_style to enable displaying the progress as a count instead of a percentage.

  • #3837: Added support for ‘xfailed’ and ‘xpassed’ outcomes to the pytester.RunResult.assert_outcomes signature.

Bug Fixes

  • #3911: Terminal writer now takes into account unicode character width when writing out progress.
  • #3913: Pytest now returns with correct exit code (EXIT_USAGEERROR, 4) when called with unknown arguments.
  • #3918: Improve performance of assertion rewriting.

Improved Documentation

  • #3566: Added a blurb in usage.rst for the usage of -r flag which is used to show an extra test summary info.
  • #3907: Corrected type of the exceptions collection passed to xfail: raises argument accepts a tuple instead of list.

Trivial/Internal Changes

  • #3853: Removed "run all (no recorded failures)" message printed with --failed-first and --last-failed when there are no failed tests.

pytest 3.7.4 (2018-08-29)

Bug Fixes

  • #3506: Fix possible infinite recursion when writing .pyc files.
  • #3853: Cache plugin now obeys the -q flag when --last-failed and --failed-first flags are used.
  • #3883: Fix bad console output when using console_output_style=classic.
  • #3888: Fix macOS specific code using capturemanager plugin in doctests.

Improved Documentation

  • #3902: Fix links

pytest 3.7.3 (2018-08-26)

Bug Fixes

  • #3033: Fixtures during teardown can again use capsys and capfd to inspect output captured during tests.
  • #3773: Fix collection of tests from files if they match the python_files configuration option.
  • #3796: Fix issue where teardown of fixtures of consecutive sub-packages were executed once, at the end of the outer package.
  • #3816: Fix bug where --show-capture=no option would still show logs printed during fixture teardown.
  • #3819: Fix stdout/stderr not getting captured when real-time cli logging is active.
  • #3843: Fix collection error when specifying test functions directly in the command line using syntax together with --doctest-modules.
  • #3848: Fix bugs where unicode arguments could not be passed to testdir.runpytest on Python 2.
  • #3854: Fix double collection of tests within packages when the filename starts with a capital letter.

Improved Documentation

  • #3824: Added example for multiple glob pattern matches in python_files.
  • #3833: Added missing docs for pytester.Testdir.
  • #3870: Correct documentation for setuptools integration.

Trivial/Internal Changes

  • #3826: Replace broken type annotations with type comments.
  • #3845: Remove a reference to issue #568 from the documentation, which has since been fixed.

pytest 3.7.2 (2018-08-16)

Bug Fixes

  • #3671: Fix filterwarnings not being registered as a builtin mark.
  • #3768, #3789: Fix test collection from packages mixed with normal directories.
  • #3771: Fix infinite recursion during collection if a pytest_ignore_collect hook returns False instead of None.
  • #3774: Fix bug where decorated fixtures would lose functionality (for example @mock.patch).
  • #3775: Fix bug where importing modules or other objects with prefix pytest_ prefix would raise a PluginValidationError.
  • #3788: Fix AttributeError during teardown of TestCase subclasses which raise an exception during __init__.
  • #3804: Fix traceback reporting for exceptions with __cause__ cycles.

Improved Documentation

  • #3746: Add documentation for metafunc.config that had been mistakenly hidden.

pytest 3.7.1 (2018-08-02)

Bug Fixes

  • #3473: Raise immediately if approx() is given an expected value of a type it doesn’t understand (e.g. strings, nested dicts, etc.).
  • #3712: Correctly represent the dimensions of a numpy array when calling repr() on approx().
  • #3742: Fix incompatibility with third party plugins during collection, which produced the error object has no attribute '_collectfile'.
  • #3745: Display the absolute path if cache_dir is not relative to the rootdir instead of failing.
  • #3747: Fix compatibility problem with plugins and the warning code issued by fixture functions when they are called directly.
  • #3748: Fix infinite recursion in pytest.approx with arrays in numpy<1.13.
  • #3757: Pin pathlib2 to >=2.2.0 as we require __fspath__ support.
  • #3763: Fix TypeError when the assertion message is bytes in python 3.

pytest 3.7.0 (2018-07-30)

Deprecations and Removals


  • #2283: New package fixture scope: fixtures are finalized when the last test of a package finishes. This feature is considered experimental, so use it sparingly.
  • #3576: Node.add_marker now supports an append=True/False parameter to determine whether the mark comes last (default) or first.
  • #3579: Fixture caplog now has a messages property, providing convenient access to the format-interpolated log messages without the extra data provided by the formatter/handler.
  • #3610: New --trace option to enter the debugger at the start of a test.
  • #3623: Introduce pytester.copy_example as helper to do acceptance tests against examples from the project.

Bug Fixes

  • #2220: Fix a bug where fixtures overridden by direct parameters (for example parametrization) were being instantiated even if they were not being used by a test.
  • #3695: Fix ApproxNumpy initialisation argument mixup, abs and rel tolerances were flipped causing strange comparison results. Add tests to check abs and rel tolerances for np.array and test for expecting nan with np.array()
  • #980: Fix truncated locals output in verbose mode.

Improved Documentation

  • #3295: Correct the usage documentation of --last-failed-no-failures by adding the missing --last-failed argument in the presented examples, because they are misleading and lead to think that the missing argument is not needed.

Trivial/Internal Changes

  • #3519: Now a file is created in .pytest_cache to make it clear why the directory exists.

pytest 3.6.4 (2018-07-28)

Bug Fixes

  • Invoke pytest using -mpytest so sys.path does not get polluted by packages installed in site-packages. (#742)

Improved Documentation

  • Use smtp_connection instead of smtp in fixtures documentation to avoid possible confusion. (#3592)

Trivial/Internal Changes

  • Remove obsolete __future__ imports. (#2319)
  • Add CITATION to provide information on how to formally cite pytest. (#3402)
  • Replace broken type annotations with type comments. (#3635)
  • Pin pluggy to <0.8. (#3727)

pytest 3.6.3 (2018-07-04)

Bug Fixes

  • Fix ImportWarning triggered by explicit relative imports in assertion-rewritten package modules. (#3061)
  • Fix error in pytest.approx when dealing with 0-dimension numpy arrays. (#3593)
  • No longer raise ValueError when using the get_marker API. (#3605)
  • Fix problem where log messages with non-ascii characters would not appear in the output log file. (#3630)
  • No longer raise AttributeError when legacy marks can’t be stored in functions. (#3631)

Improved Documentation

  • The description above the example for @pytest.mark.skipif now better matches the code. (#3611)

Trivial/Internal Changes

  • Internal refactoring: removed unused CallSpec2tox ._globalid_args attribute and metafunc parameter from CallSpec2.copy(). (#3598)
  • Silence usage of reduce warning in Python 2 (#3609)
  • Fix usage of attr.ib deprecated convert parameter. (#3653)

pytest 3.6.2 (2018-06-20)

Bug Fixes

  • Fix regression in Node.add_marker by extracting the mark object of a MarkDecorator. (#3555)
  • Warnings without location were reported as None. This is corrected to now report <undetermined location>. (#3563)
  • Continue to call finalizers in the stack when a finalizer in a former scope raises an exception. (#3569)
  • Fix encoding error with print statements in doctests (#3583)

Improved Documentation

  • Add documentation for the --strict flag. (#3549)

Trivial/Internal Changes

  • Update old quotation style to parens in fixture.rst documentation. (#3525)
  • Improve display of hint about --fulltrace with KeyboardInterrupt. (#3545)
  • pytest’s testsuite is no longer runnable through python test – instead invoke pytest or tox directly. (#3552)
  • Fix typo in documentation (#3567)

pytest 3.6.1 (2018-06-05)

Bug Fixes

  • Fixed a bug where stdout and stderr were logged twice by junitxml when a test was marked xfail. (#3491)
  • Fix usefixtures mark applyed to unittest tests by correctly instantiating FixtureInfo. (#3498)
  • Fix assertion rewriter compatibility with libraries that monkey patch file objects. (#3503)

Improved Documentation

  • Added a section on how to use fixtures as factories to the fixture documentation. (#3461)

Trivial/Internal Changes

  • Enable caching for pip/pre-commit in order to reduce build time on travis/appveyor. (#3502)
  • Switch pytest to the src/ layout as we already suggested it for good practice - now we implement it as well. (#3513)
  • Fix if in tests to support 3.7.0b5, where a docstring handling in AST got reverted. (#3530)
  • Remove some python2.5 compatibility code. (#3529)

pytest 3.6.0 (2018-05-23)


  • Revamp the internals of the pytest.mark implementation with correct per node handling which fixes a number of long standing bugs caused by the old design. This introduces new Node.iter_markers(name) and Node.get_closest_marker(name) APIs. Users are strongly encouraged to read the reasons for the revamp in the docs, or jump over to details about updating existing code to use the new APIs. (#3317)
  • Now when @pytest.fixture is applied more than once to the same function a ValueError is raised. This buggy behavior would cause surprising problems and if was working for a test suite it was mostly by accident. (#2334)
  • Support for Python 3.7’s builtin breakpoint() method, see Using the builtin breakpoint function for details. (#3180)
  • monkeypatch now supports a context() function which acts as a context manager which undoes all patching done within the with block. (#3290)
  • The --pdb option now causes KeyboardInterrupt to enter the debugger, instead of stopping the test session. On python 2.7, hitting CTRL+C again exits the debugger. On python 3.2 and higher, use CTRL+D. (#3299)
  • pytest no longer changes the log level of the root logger when the log-level parameter has greater numeric value than that of the level of the root logger, which makes it play better with custom logging configuration in user code. (#3307)

Bug Fixes

  • A rare race-condition which might result in corrupted .pyc files on Windows has been hopefully solved. (#3008)
  • Also use iter_marker for discovering the marks applying for marker expressions from the cli to avoid the bad data from the legacy mark storage. (#3441)
  • When showing diffs of failed assertions where the contents contain only whitespace, escape them using repr() first to make it easy to spot the differences. (#3443)

Improved Documentation

  • Change documentation copyright year to a range which auto-updates itself each time it is published. (#3303)

Trivial/Internal Changes

  • pytest now depends on the python-atomicwrites library. (#3008)
  • Update all URLs to (#3431)
  • Detect pytest_ prefixed hooks using the internal plugin manager since pluggy is deprecating the implprefix argument to PluginManager. (#3487)
  • Import Mapping and Sequence from _pytest.compat instead of directly from collections in Add Mapping to _pytest.compat, import it from collections on python 2, but from on Python 3 to avoid a DeprecationWarning on Python 3.7 or newer. (#3497)

pytest 3.5.1 (2018-04-23)

Bug Fixes

  • Reset sys.last_type, sys.last_value and sys.last_traceback before each test executes. Those attributes are added by pytest during the test run to aid debugging, but were never reset so they would create a leaking reference to the last failing test’s frame which in turn could never be reclaimed by the garbage collector. (#2798)
  • pytest.raises now raises TypeError when receiving an unknown keyword argument. (#3348)
  • pytest.raises now works with exception classes that look like iterables. (#3372)

Improved Documentation

  • Fix typo in caplog fixture documentation, which incorrectly identified certain attributes as methods. (#3406)

Trivial/Internal Changes

  • Added a more indicative error message when parametrizing a function whose argument takes a default value. (#3221)
  • Remove internal _pytest.terminal.flatten function in favor of more_itertools.collapse. (#3330)
  • Import some modules from instead of collections as the former modules trigger DeprecationWarning in Python 3.7. (#3339)
  • record_property is no longer experimental, removing the warnings was forgotten. (#3360)
  • Mention in documentation and CLI help that fixtures with leading _ are printed by pytest --fixtures only if the -v option is added. (#3398)

pytest 3.5.0 (2018-03-21)

Deprecations and Removals

  • record_xml_property fixture is now deprecated in favor of the more generic record_property. (#2770)
  • Defining pytest_plugins is now deprecated in non-top-level files, because they “leak” to the entire directory tree. See the docs for the rationale behind this decision (#3084)


  • New --show-capture command-line option that allows to specify how to display captured output when tests fail: no, stdout, stderr, log or all (the default). (#1478)
  • New --rootdir command-line option to override the rules for discovering the root directory. See customize in the documentation for details. (#1642)
  • Fixtures are now instantiated based on their scopes, with higher-scoped fixtures (such as session) being instantiated first than lower-scoped fixtures (such as function). The relative order of fixtures of the same scope is kept unchanged, based in their declaration order and their dependencies. (#2405)
  • record_xml_property renamed to record_property and is now compatible with xdist, markers and any reporter. record_xml_property name is now deprecated. (#2770)
  • New --nf, --new-first options: run new tests first followed by the rest of the tests, in both cases tests are also sorted by the file modified time, with more recent files coming first. (#3034)
  • New --last-failed-no-failures command-line option that allows to specify the behavior of the cache plugin’s `--last-failed feature when no tests failed in the last run (or no cache was found): none or all (the default). (#3139)
  • New --doctest-continue-on-failure command-line option to enable doctests to show multiple failures for each snippet, instead of stopping at the first failure. (#3149)
  • Captured log messages are added to the <system-out> tag in the generated junit xml file if the junit_logging ini option is set to system-out. If the value of this ini option is system-err, the logs are written to <system-err>. The default value for junit_logging is no, meaning captured logs are not written to the output file. (#3156)
  • Allow the logging plugin to handle pytest_runtest_logstart and pytest_runtest_logfinish hooks when live logs are enabled. (#3189)
  • Passing --log-cli-level in the command-line now automatically activates live logging. (#3190)
  • Add command line option --deselect to allow deselection of individual tests at collection time. (#3198)
  • Captured logs are printed before entering pdb. (#3204)
  • Deselected item count is now shown before tests are run, e.g. collected X items / Y deselected. (#3213)
  • The builtin module platform is now available for use in expressions in pytest.mark. (#3236)
  • The short test summary info section now is displayed after tracebacks and warnings in the terminal. (#3255)
  • New --verbosity flag to set verbosity level explicitly. (#3296)
  • pytest.approx now accepts comparing a numpy array with a scalar. (#3312)

Bug Fixes

  • Suppress IOError when closing the temporary file used for capturing streams in Python 2.7. (#2370)
  • Fixed clear() method on caplog fixture which cleared records, but not the text property. (#3297)
  • During test collection, when stdin is not allowed to be read, the DontReadFromStdin object still allow itself to be iterable and resolved to an iterator without crashing. (#3314)

Improved Documentation

Trivial/Internal Changes

  • Change minimum requirement of attrs to 17.4.0. (#3228)
  • Renamed example directories so all tests pass when ran from the base directory. (#3245)
  • Internal module has been turned into a package. (#3250)
  • pytest now depends on the more-itertools package. (#3265)
  • Added warning when [pytest] section is used in a .cfg file passed with -c (#3268)
  • nodeids can now be passed explicitly to FSCollector and Node constructors. (#3291)
  • Internal refactoring of FormattedExcinfo to use attrs facilities and remove old support code for legacy Python versions. (#3292)
  • Refactoring to unify how verbosity is handled internally. (#3296)
  • Internal refactoring to better integrate with argparse. (#3304)
  • Fix a python example when calling a fixture in doc/en/usage.rst (#3308)

pytest 3.4.2 (2018-03-04)

Bug Fixes

  • Removed progress information when capture option is no. (#3203)
  • Refactor check of bindir from exists to isdir. (#3241)
  • Fix TypeError issue when using approx with a Decimal value. (#3247)
  • Fix reference cycle generated when using the request fixture. (#3249)
  • [tool:pytest] sections in *.cfg files passed by the -c option are now properly recognized. (#3260)

Improved Documentation

  • Add logging plugin to plugins list. (#3209)

Trivial/Internal Changes

  • Fix minor typo in fixture.rst (#3259)

pytest 3.4.1 (2018-02-20)

Bug Fixes

  • Move import of doctest.UnexpectedException to top-level to avoid possible errors when using --pdb. (#1810)
  • Added printing of captured stdout/stderr before entering pdb, and improved a test which was giving false negatives about output capturing. (#3052)
  • Fix ordering of tests using parametrized fixtures which can lead to fixtures being created more than necessary. (#3161)
  • Fix bug where logging happening at hooks outside of “test run” hooks would cause an internal error. (#3184)
  • Detect arguments injected by unittest.mock.patch decorator correctly when pypi mock.patch is installed and imported. (#3206)
  • Errors shown when a pytest.raises() with match= fails are now cleaner on what happened: When no exception was raised, the “matching ‘…’” part got removed as it falsely implies that an exception was raised but it didn’t match. When a wrong exception was raised, it’s now thrown (like pytest.raised() without match= would) instead of complaining about the unmatched text. (#3222)
  • Fixed output capture handling in doctests on macOS. (#985)

Improved Documentation

  • Add Sphinx parameter docs for match and message args to pytest.raises. (#3202)

Trivial/Internal Changes

  • pytest has changed the publication procedure and is now being published to PyPI directly from Travis. (#3060)
  • Rename ParameterSet._for_parameterize() to _for_parametrize() in order to comply with the naming convention. (#3166)
  • Skip failing pdb/doctest test on mac. (#985)

pytest 3.4.0 (2018-01-30)

Deprecations and Removals

  • All pytest classes now subclass object for better Python 2/3 compatibility. This should not affect user code except in very rare edge cases. (#2147)


  • Introduce empty_parameter_set_mark ini option to select which mark to apply when @pytest.mark.parametrize is given an empty set of parameters. Valid options are skip (default) and xfail. Note that it is planned to change the default to xfail in future releases as this is considered less error prone. (#2527)
  • Incompatible change: after community feedback the logging functionality has undergone some changes. Please consult the logging documentation for details. (#3013)
  • Console output falls back to “classic” mode when capturing is disabled (-s), otherwise the output gets garbled to the point of being useless. (#3038)
  • New pytest_runtest_logfinish hook which is called when a test item has finished executing, analogous to pytest_runtest_logstart. (#3101)
  • Improve performance when collecting tests using many fixtures. (#3107)
  • New caplog.get_records(when) method which provides access to the captured records for the "setup", "call" and "teardown" testing stages. (#3117)
  • New fixture record_xml_attribute that allows modifying and inserting attributes on the <testcase> xml node in JUnit reports. (#3130)
  • The default cache directory has been renamed from .cache to .pytest_cache after community feedback that the name .cache did not make it clear that it was used by pytest. (#3138)
  • Colorize the levelname column in the live-log output. (#3142)

Bug Fixes

  • Fix hanging pexpect test on MacOS by using flush() instead of wait(). (#2022)
  • Fix restoring Python state after in-process pytest runs with the pytester plugin; this may break tests using multiple inprocess pytest runs if later ones depend on earlier ones leaking global interpreter changes. (#3016)
  • Fix skipping plugin reporting hook when test aborted before plugin setup hook. (#3074)
  • Fix progress percentage reported when tests fail during teardown. (#3088)
  • Incompatible change: -o/--override option no longer eats all the remaining options, which can lead to surprising behavior: for example, pytest -o foo=1 /path/to/ would fail because /path/to/ would be considered as part of the -o command-line argument. One consequence of this is that now multiple configuration overrides need multiple -o flags: pytest -o foo=1 -o bar=2. (#3103)

Improved Documentation

  • Document hooks (defined with historic=True) which cannot be used with hookwrapper=True. (#2423)
  • Clarify that warning capturing doesn’t change the warning filter by default. (#2457)
  • Clarify a possible confusion when using pytest_fixture_setup with fixture functions that return None. (#2698)
  • Fix the wording of a sentence on doctest flags used in pytest. (#3076)
  • Prefer https://* over http://* for links in the documentation. (#3092)
  • Improve readability (wording, grammar) of Getting Started guide (#3131)
  • Added note that calling pytest.main multiple times from the same process is not recommended because of import caching. (#3143)

Trivial/Internal Changes

  • Show a simple and easy error when keyword expressions trigger a syntax error (for example, "-k foo and import" will show an error that you can not use the import keyword in expressions). (#2953)
  • Change parametrized automatic test id generation to use the __name__ attribute of functions instead of the fallback argument name plus counter. (#2976)
  • Replace py.std with stdlib imports. (#3067)
  • Corrected ‘you’ to ‘your’ in logging docs. (#3129)

pytest 3.3.2 (2017-12-25)

Bug Fixes

  • pytester: ignore files used to obtain current user metadata in the fd leak detector. (#2784)
  • Fix memory leak where objects returned by fixtures were never destructed by the garbage collector. (#2981)
  • Fix conversion of pyargs to filename to not convert symlinks on Python 2. (#2985)
  • PYTEST_DONT_REWRITE is now checked for plugins too rather than only for test modules. (#2995)

Improved Documentation

  • Add clarifying note about behavior of multiple parametrized arguments (#3001)

Trivial/Internal Changes

  • Code cleanup. (#3015, #3021)
  • Clean up code by replacing imports and references of _ast to ast. (#3018)

pytest 3.3.1 (2017-12-05)

Bug Fixes

  • Fix issue about -p no:<plugin> having no effect. (#2920)
  • Fix regression with warnings that contained non-strings in their arguments in Python 2. (#2956)
  • Always escape null bytes when setting PYTEST_CURRENT_TEST. (#2957)
  • Fix ZeroDivisionError when using the testmon plugin when no tests were actually collected. (#2971)
  • Bring back TerminalReporter.writer as an alias to TerminalReporter._tw. This alias was removed by accident in the 3.3.0 release. (#2984)
  • The pytest-capturelog plugin is now also blacklisted, avoiding errors when running pytest with it still installed. (#3004)

Improved Documentation

  • Fix broken link to plugin pytest-localserver. (#2963)

Trivial/Internal Changes

  • Update github “bugs” link in CONTRIBUTING.rst (#2949)

pytest 3.3.0 (2017-11-23)

Deprecations and Removals

  • pytest no longer supports Python 2.6 and 3.3. Those Python versions are EOL for some time now and incur maintenance and compatibility costs on the pytest core team, and following up with the rest of the community we decided that they will no longer be supported starting on this version. Users which still require those versions should pin pytest to <3.3. (#2812)
  • Remove internal _preloadplugins() function. This removal is part of the pytest_namespace() hook deprecation. (#2636)
  • Internally change CallSpec2 to have a list of marks instead of a broken mapping of keywords. This removes the keywords attribute of the internal CallSpec2 class. (#2672)
  • Remove ParameterSet.deprecated_arg_dict - its not a public api and the lack of the underscore was a naming error. (#2675)
  • Remove the internal multi-typed attribute Node._evalskip and replace it with the boolean Node._skipped_by_mark. (#2767)
  • The params list passed to pytest.fixture is now for all effects considered immutable and frozen at the moment of the pytest.fixture call. Previously the list could be changed before the first invocation of the fixture allowing for a form of dynamic parametrization (for example, updated from command-line options), but this was an unwanted implementation detail which complicated the internals and prevented some internal cleanup. See issue #2959 for details and a recommended workaround.


  • pytest_fixture_post_finalizer hook can now receive a request argument. (#2124)
  • Replace the old introspection code in that determines the available arguments of fixtures with inspect.signature on Python 3 and funcsigs.signature on Python 2. This should respect __signature__ declarations on functions. (#2267)
  • Report tests with global pytestmark variable only once. (#2549)
  • Now pytest displays the total progress percentage while running tests. The previous output style can be set by configuring the console_output_style setting to classic. (#2657)
  • Match warns signature to raises by adding match keyword. (#2708)
  • pytest now captures and displays output from the standard logging module. The user can control the logging level to be captured by specifying options in pytest.ini, the command line and also during individual tests using markers. Also, a caplog fixture is available that enables users to test the captured log during specific tests (similar to capsys for example). For more information, please see the logging docs. This feature was introduced by merging the popular pytest-catchlog plugin, thanks to Thomas Hisch. Be advised that during the merging the backward compatibility interface with the defunct pytest-capturelog has been dropped. (#2794)
  • Add allow_module_level kwarg to pytest.skip(), enabling to skip the whole module. (#2808)
  • Allow setting file_or_dir, -c, and -o in PYTEST_ADDOPTS. (#2824)
  • Return stdout/stderr capture results as a namedtuple, so out and err can be accessed by attribute. (#2879)
  • Add capfdbinary, a version of capfd which returns bytes from readouterr(). (#2923)
  • Add capsysbinary a version of capsys which returns bytes from readouterr(). (#2934)
  • Implement feature to skip files when run with --doctest-modules. (#502)

Bug Fixes

  • Resume output capturing after capsys/capfd.disabled() context manager. (#1993)
  • pytest_fixture_setup and pytest_fixture_post_finalizer hooks are now called for all files. (#2124)
  • If an exception happens while loading a plugin, pytest no longer hides the original traceback. In Python 2 it will show the original traceback with a new message that explains in which plugin. In Python 3 it will show 2 canonized exceptions, the original exception while loading the plugin in addition to an exception that pytest throws about loading a plugin. (#2491)
  • capsys and capfd can now be used by other fixtures. (#2709)
  • Internal pytester plugin properly encodes bytes arguments to utf-8. (#2738)
  • testdir now uses use the same method used by tmpdir to create its temporary directory. This changes the final structure of the testdir directory slightly, but should not affect usage in normal scenarios and avoids a number of potential problems. (#2751)
  • pytest no longer complains about warnings with unicode messages being non-ascii compatible even for ascii-compatible messages. As a result of this, warnings with unicode messages are converted first to an ascii representation for safety. (#2809)
  • Change return value of pytest command when --maxfail is reached from 2 (interrupted) to 1 (failed). (#2845)
  • Fix issue in assertion rewriting which could lead it to rewrite modules which should not be rewritten. (#2939)
  • Handle marks without description in pytest.ini. (#2942)

Trivial/Internal Changes

  • pytest now depends on attrs for internal structures to ease code maintainability. (#2641)
  • Refactored internal Python 2/3 compatibility code to use six. (#2642)
  • Stop vendoring pluggy - we’re missing out on its latest changes for not much benefit (#2719)
  • Internal refactor: simplify ascii string escaping by using the backslashreplace error handler in newer Python 3 versions. (#2734)
  • Remove unnecessary mark evaluator in unittest plugin (#2767)
  • Calls to Metafunc.addcall now emit a deprecation warning. This function is scheduled to be removed in pytest-4.0. (#2876)
  • Internal move of the parameterset extraction to a more maintainable place. (#2877)
  • Internal refactoring to simplify scope node lookup. (#2910)
  • Configure pytest to prevent pip from installing pytest in unsupported Python versions. (#2922)

pytest 3.2.5 (2017-11-15)

Bug Fixes

  • Remove py<1.5 restriction from pytest as this can cause version conflicts in some installations. (#2926)

pytest 3.2.4 (2017-11-13)

Bug Fixes

  • Fix the bug where running with --pyargs will result in items with empty parent.nodeid if run from a different root directory. (#2775)
  • Fix issue with @pytest.parametrize if argnames was specified as keyword arguments. (#2819)
  • Strip whitespace from marker names when reading them from INI config. (#2856)
  • Show full context of doctest source in the pytest output, if the line number of failed example in the docstring is < 9. (#2882)
  • Match fixture paths against actual path segments in order to avoid matching folders which share a prefix. (#2836)

Improved Documentation

  • Introduce a dedicated section about (#1505)
  • Explicitly mention xpass in the documentation of xfail. (#1997)
  • Append example for pytest.param in the example/parametrize document. (#2658)
  • Clarify language of proposal for fixtures parameters (#2893)
  • List python 3.6 in the documented supported versions in the getting started document. (#2903)
  • Clarify the documentation of available fixture scopes. (#538)
  • Add documentation about the python -m pytest invocation adding the current directory to sys.path. (#911)

pytest 3.2.3 (2017-10-03)

Bug Fixes

  • Fix crash in tab completion when no prefix is given. (#2748)
  • The equality checking function (__eq__) of MarkDecorator returns False if one object is not an instance of MarkDecorator. (#2758)
  • When running pytest --fixtures-per-test: don’t crash if an item has no _fixtureinfo attribute (e.g. doctests) (#2788)

Improved Documentation

  • In help text of -k option, add example of using not to not select certain tests whose names match the provided expression. (#1442)
  • Add note in parametrize.rst about calling metafunc.parametrize multiple times. (#1548)

Trivial/Internal Changes

  • Set xfail_strict=True in pytest’s own test suite to catch expected failures as soon as they start to pass. (#2722)
  • Fix typo in example of passing a callable to markers (in example/markers.rst) (#2765)

pytest 3.2.2 (2017-09-06)

Bug Fixes

  • Calling the deprecated request.getfuncargvalue() now shows the source of the call. (#2681)
  • Allow tests declared as @staticmethod to use fixtures. (#2699)
  • Fixed edge-case during collection: attributes which raised when accessed would abort the entire collection. (#2707)
  • Fix ReprFuncArgs with mixed unicode and UTF-8 args. (#2731)

Improved Documentation

  • In examples on working with custom markers, add examples demonstrating the usage of pytest.mark.MARKER_NAME.with_args in comparison with pytest.mark.MARKER_NAME.__call__ (#2604)
  • In one of the simple examples, use pytest_collection_modifyitems() to skip tests based on a command-line option, allowing its sharing while preventing a user error when acessing pytest.config before the argument parsing. (#2653)

Trivial/Internal Changes

  • Fixed minor error in ‘Good Practices/Manual Integration’ code snippet. (#2691)
  • Fixed typo in goodpractices.rst. (#2721)
  • Improve user guidance regarding --resultlog deprecation. (#2739)

pytest 3.2.1 (2017-08-08)

Bug Fixes

  • Fixed small terminal glitch when collecting a single test item. (#2579)
  • Correctly consider / as the file separator to automatically mark plugin files for rewrite on Windows. (#2591)
  • Properly escape test names when setting PYTEST_CURRENT_TEST environment variable. (#2644)
  • Fix error on Windows and Python 3.6+ when sys.stdout has been replaced with a stream-like object which does not implement the full io module buffer protocol. In particular this affects pytest-xdist users on the aforementioned platform. (#2666)

Improved Documentation

  • Explicitly document which pytest features work with unittest. (#2626)

pytest 3.2.0 (2017-07-30)

Deprecations and Removals

  • pytest.approx no longer supports >, >=, < and <= operators to avoid surprising/inconsistent behavior. See the approx docs for more information. (#2003)
  • All old-style specific behavior in current classes in the pytest’s API is considered deprecated at this point and will be removed in a future release. This affects Python 2 users only and in rare situations. (#2147)
  • A deprecation warning is now raised when using marks for parameters in pytest.mark.parametrize. Use pytest.param to apply marks to parameters instead. (#2427)


  • Add support for numpy arrays (and dicts) to approx. (#1994)
  • Now test function objects have a pytestmark attribute containing a list of marks applied directly to the test function, as opposed to marks inherited from parent classes or modules. (#2516)
  • Collection ignores local virtualenvs by default; --collect-in-virtualenv overrides this behavior. (#2518)
  • Allow class methods decorated as @staticmethod to be candidates for collection as a test function. (Only for Python 2.7 and above. Python 2.6 will still ignore static methods.) (#2528)
  • Introduce mark.with_args in order to allow passing functions/classes as sole argument to marks. (#2540)
  • New cache_dir ini option: sets the directory where the contents of the cache plugin are stored. Directory may be relative or absolute path: if relative path, then directory is created relative to rootdir, otherwise it is used as is. Additionally path may contain environment variables which are expanded during runtime. (#2543)
  • Introduce the PYTEST_CURRENT_TEST environment variable that is set with the nodeid and stage (setup, call and teardown) of the test being currently executed. See the documentation for more info. (#2583)
  • Introduced @pytest.mark.filterwarnings mark which allows overwriting the warnings filter on a per test, class or module level. See the docs for more information. (#2598)
  • --last-failed now remembers forever when a test has failed and only forgets it if it passes again. This makes it easy to fix a test suite by selectively running files and fixing tests incrementally. (#2621)
  • New pytest_report_collectionfinish hook which allows plugins to add messages to the terminal reporting after collection has been finished successfully. (#2622)
  • Added support for PEP-415’s Exception.__suppress_context__. Now if a raise exception from None is caught by pytest, pytest will no longer chain the context in the test report. The behavior now matches Python’s traceback behavior. (#2631)
  • Exceptions raised by, pytest.skip and pytest.xfail now subclass BaseException, making them harder to be caught unintentionally by normal code. (#580)

Bug Fixes

  • Set stdin to a closed PIPE in for avoid unwanted interactive pdb (#2023)
  • Add missing encoding attribute to sys.std* streams when using capsys capture mode. (#2375)
  • Fix terminal color changing to black on Windows if colorama is imported in a file. (#2510)
  • Fix line number when reporting summary of skipped tests. (#2548)
  • capture: ensure that is a string. (#2555)
  • The options --fixtures and --fixtures-per-test will now keep indentation within docstrings. (#2574)
  • doctests line numbers are now reported correctly, fixing pytest-sugar#122. (#2610)
  • Fix non-determinism in order of fixture collection. Adds new dependency (ordereddict) for Python 2.6. (#920)

Improved Documentation

  • Clarify pytest_configure hook call order. (#2539)
  • Extend documentation for testing plugin code with the pytester plugin. (#971)

Trivial/Internal Changes

  • Update help message for --strict to make it clear it only deals with unregistered markers, not warnings. (#2444)
  • Internal code move: move code for pytest.approx/pytest.raises to own files in order to cut down the size of (#2489)
  • Renamed the utility function _pytest.compat._escape_strings to _ascii_escaped to better communicate the function’s purpose. (#2533)
  • Improve error message for CollectError with skip/skipif. (#2546)
  • Emit warning about yield tests being deprecated only once per generator. (#2562)
  • Ensure final collected line doesn’t include artifacts of previous write. (#2571)
  • Fixed all flake8 errors and warnings. (#2581)
  • Added fix-lint tox environment to run automatic pep8 fixes on the code. (#2582)
  • Turn warnings into errors in pytest’s own test suite in order to catch regressions due to deprecations more promptly. (#2588)
  • Show multiple issue links in CHANGELOG entries. (#2620)

pytest 3.1.3 (2017-07-03)

Bug Fixes

  • Fix decode error in Python 2 for doctests in docstrings. (#2434)
  • Exceptions raised during teardown by finalizers are now suppressed until all finalizers are called, with the initial exception reraised. (#2440)
  • Fix incorrect “collected items” report when specifying tests on the command- line. (#2464)
  • deprecated_call in context-manager form now captures deprecation warnings even if the same warning has already been raised. Also, deprecated_call will always produce the same error message (previously it would produce different messages in context-manager vs. function-call mode). (#2469)
  • Fix issue where paths collected by pytest could have triple leading / characters. (#2475)
  • Fix internal error when trying to detect the start of a recursive traceback. (#2486)

Improved Documentation

  • Explicitly state for which hooks the calls stop after the first non-None result. (#2493)

Trivial/Internal Changes

  • Create invoke tasks for updating the vendored packages. (#2474)
  • Update copyright dates in LICENSE, README.rst and in the documentation. (#2499)

pytest 3.1.2 (2017-06-08)

Bug Fixes

  • Required options added via pytest_addoption will no longer prevent using –help without passing them. (#1999)
  • Respect python_files in assertion rewriting. (#2121)
  • Fix recursion error detection when frames in the traceback contain objects that can’t be compared (like numpy arrays). (#2459)
  • UnicodeWarning is issued from the internal pytest warnings plugin only when the message contains non-ascii unicode (Python 2 only). (#2463)
  • Added a workaround for Python 3.6 WindowsConsoleIO breaking due to Pytests’s FDCapture. Other code using console handles might still be affected by the very same issue and might require further workarounds/fixes, i.e. colorama. (#2467)

Improved Documentation

  • Fix internal API links to pluggy objects. (#2331)
  • Make it clear that pytest.xfail stops test execution at the calling point and improve overall flow of the skipping docs. (#810)

pytest 3.1.1 (2017-05-30)

Bug Fixes

  • pytest warning capture no longer overrides existing warning filters. The previous behaviour would override all filters and caused regressions in test suites which configure warning filters to match their needs. Note that as a side-effect of this is that DeprecationWarning and PendingDeprecationWarning are no longer shown by default. (#2430)
  • Fix issue with non-ascii contents in doctest text files. (#2434)
  • Fix encoding errors for unicode warnings in Python 2. (#2436)
  • pytest.deprecated_call now captures PendingDeprecationWarning in context manager form. (#2441)

Improved Documentation

  • Addition of towncrier for changelog management. (#2390)

3.1.0 (2017-05-22)

New Features

  • The pytest-warnings plugin has been integrated into the core and now pytest automatically captures and displays warnings at the end of the test session.


    This feature may disrupt test suites which apply and treat warnings themselves, and can be disabled in your pytest.ini:

    addopts = -p no:warnings

    See the warnings documentation page for more information.

    Thanks @nicoddemus for the PR.

  • Added junit_suite_name ini option to specify root <testsuite> name for JUnit XML reports (#533).

  • Added an ini option doctest_encoding to specify which encoding to use for doctest files. Thanks @wheerd for the PR (#2101).

  • pytest.warns now checks for subclass relationship rather than class equality. Thanks @lesteve for the PR (#2166)

  • pytest.raises now asserts that the error message matches a text or regex with the match keyword argument. Thanks @Kriechi for the PR.

  • pytest.param can be used to declare test parameter sets with marks and test ids. Thanks @RonnyPfannschmidt for the PR.


  • remove all internal uses of pytest_namespace hooks, this is to prepare the removal of preloadconfig in pytest 4.0 Thanks to @RonnyPfannschmidt for the PR.
  • pytest now warns when a callable ids raises in a parametrized test. Thanks @fogo for the PR.
  • It is now possible to skip test classes from being collected by setting a __test__ attribute to False in the class body (#2007). Thanks to @syre for the report and @lwm for the PR.
  • Change to produce reports that comply with Junitxml schema. If the same test fails with failure in call and then errors in teardown we split testcase element into two, one containing the error and the other the failure. (#2228) Thanks to @kkoukiou for the PR.
  • Testcase reports with a url attribute will now properly write this to junitxml. Thanks @fushi for the PR (#1874).
  • Remove common items from dict comparison output when verbosity=1. Also update the truncation message to make it clearer that pytest truncates all assertion messages if verbosity < 2 (#1512). Thanks @mattduck for the PR
  • --pdbcls no longer implies --pdb. This makes it possible to use addopts=--pdbcls=module.SomeClass on pytest.ini. Thanks @davidszotten for the PR (#1952).
  • fix #2013: turn RecordedWarning into namedtuple, to give it a comprehensible repr while preventing unwarranted modification.
  • fix #2208: ensure an iteration limit for _pytest.compat.get_real_func. Thanks @RonnyPfannschmidt for the report and PR.
  • Hooks are now verified after collection is complete, rather than right after loading installed plugins. This makes it easy to write hooks for plugins which will be loaded during collection, for example using the pytest_plugins special variable (#1821). Thanks @nicoddemus for the PR.
  • Modify pytest_make_parametrize_id() hook to accept argname as an additional parameter. Thanks @unsignedint for the PR.
  • Add venv to the default norecursedirs setting. Thanks @The-Compiler for the PR.
  • PluginManager.import_plugin now accepts unicode plugin names in Python 2. Thanks @reutsharabani for the PR.
  • fix #2308: When using both --lf and --ff, only the last failed tests are run. Thanks @ojii for the PR.
  • Replace minor/patch level version numbers in the documentation with placeholders. This significantly reduces change-noise as different contributors regnerate the documentation on different platforms. Thanks @RonnyPfannschmidt for the PR.
  • fix #2391: consider pytest_plugins on all plugin modules Thanks @RonnyPfannschmidt for the PR.

Bug Fixes

  • Fix AttributeError on sys.stdout.buffer / sys.stderr.buffer while using capsys fixture in python 3. (#1407). Thanks to @asottile.
  • Change’s DontReadFromInput class to throw io.UnsupportedOperation errors rather than ValueErrors in the fileno method (#2276). Thanks @metasyn and @vlad-dragos for the PR.
  • Fix exception formatting while importing modules when the exception message contains non-ascii characters (#2336). Thanks @fabioz for the report and @nicoddemus for the PR.
  • Added documentation related to issue (#1937) Thanks @skylarjhdownes for the PR.
  • Allow collecting files with any file extension as Python modules (#2369). Thanks @Kodiologist for the PR.
  • Show the correct error message when collect “parametrize” func with wrong args (#2383). Thanks @The-Compiler for the report and @robin0371 for the PR.

3.0.7 (2017-03-14)

  • Fix issue in assertion rewriting breaking due to modules silently discarding other modules when importing fails Notably, importing the anydbm module is fixed. (#2248). Thanks @pfhayes for the PR.
  • junitxml: Fix problematic case where system-out tag occurred twice per testcase element in the XML report. Thanks @kkoukiou for the PR.
  • Fix regression, pytest now skips unittest correctly if run with --pdb (#2137). Thanks to @gst for the report and @mbyt for the PR.
  • Ignore exceptions raised from descriptors (e.g. properties) during Python test collection (#2234). Thanks to @bluetech.
  • --override-ini now correctly overrides some fundamental options like python_files (#2238). Thanks @sirex for the report and @nicoddemus for the PR.
  • Replace raise StopIteration usages in the code by simple returns to finish generators, in accordance to PEP-479 (#2160). Thanks @tgoodlet for the report and @nicoddemus for the PR.
  • Fix internal errors when an unprintable AssertionError is raised inside a test. Thanks @omerhadari for the PR.
  • Skipping plugin now also works with test items generated by custom collectors (#2231). Thanks to @vidartf.
  • Fix trailing whitespace in console output if no .ini file presented (#2281). Thanks @fbjorn for the PR.
  • Conditionless xfail markers no longer rely on the underlying test item being an instance of PyobjMixin, and can therefore apply to tests not collected by the built-in python test collector. Thanks @barneygale for the PR.

3.0.6 (2017-01-22)

  • pytest no longer generates PendingDeprecationWarning from its own operations, which was introduced by mistake in version 3.0.5 (#2118). Thanks to @nicoddemus for the report and @RonnyPfannschmidt for the PR.
  • pytest no longer recognizes coroutine functions as yield tests (#2129). Thanks to @malinoff for the PR.
  • Plugins loaded by the PYTEST_PLUGINS environment variable are now automatically considered for assertion rewriting (#2185). Thanks @nicoddemus for the PR.
  • Improve error message when pytest.warns fails (#2150). The type(s) of the expected warnings and the list of caught warnings is added to the error message. Thanks @lesteve for the PR.
  • Fix pytester internal plugin to work correctly with latest versions of zope.interface (#1989). Thanks @nicoddemus for the PR.
  • Assert statements of the pytester plugin again benefit from assertion rewriting (#1920). Thanks @RonnyPfannschmidt for the report and @nicoddemus for the PR.
  • Specifying tests with colons like for tests in subdirectories with ini configuration files now uses the correct ini file (#2148). Thanks @pelme.
  • Fail testdir.runpytest().assert_outcomes() explicitly if the pytest terminal output it relies on is missing. Thanks to @eli-b for the PR.

3.0.5 (2016-12-05)

  • Add warning when not passing option=value correctly to -o/--override-ini (#2105). Also improved the help documentation. Thanks to @mbukatov for the report and @lwm for the PR.
  • Now --confcutdir and --junit-xml are properly validated if they are directories and filenames, respectively (#2089 and #2078). Thanks to @lwm for the PR.
  • Add hint to error message hinting possible missing (#478). Thanks @DuncanBetts.
  • More accurately describe when fixture finalization occurs in documentation (#687). Thanks @DuncanBetts.
  • Provide :ref: targets for recwarn.rst so we can use intersphinx referencing. Thanks to @dupuy for the report and @lwm for the PR.
  • In Python 2, use a simple +- ASCII string in the string representation of pytest.approx (for example "4 +- 4.0e-06") because it is brittle to handle that in different contexts and representations internally in pytest which can result in bugs such as #2111. In Python 3, the representation still uses ± (for example 4 ± 4.0e-06). Thanks @kerrick-lyft for the report and @nicoddemus for the PR.
  • Using item.Function, item.Module, etc., is now issuing deprecation warnings, prefer pytest.Function, pytest.Module, etc., instead (#2034). Thanks @nmundar for the PR.
  • Fix error message using approx with complex numbers (#2082). Thanks @adler-j for the report and @nicoddemus for the PR.
  • Fixed false-positives warnings from assertion rewrite hook for modules imported more than once by the pytest_plugins mechanism. Thanks @nicoddemus for the PR.
  • Remove an internal cache which could cause hooks from files in sub-directories to be called in other directories incorrectly (#2016). Thanks @d-b-w for the report and @nicoddemus for the PR.
  • Remove internal code meant to support earlier Python 3 versions that produced the side effect of leaving None in sys.modules when expressions were evaluated by pytest (for example passing a condition as a string to pytest.mark.skipif)(#2103). Thanks @jaraco for the report and @nicoddemus for the PR.
  • Cope gracefully with a .pyc file with no matching .py file (#2038). Thanks @nedbat.

3.0.4 (2016-11-09)

  • Import errors when collecting test modules now display the full traceback (#1976). Thanks @cwitty for the report and @nicoddemus for the PR.
  • Fix confusing command-line help message for custom options with two or more metavar properties (#2004). Thanks @okulynyak and @davehunt for the report and @nicoddemus for the PR.
  • When loading plugins, import errors which contain non-ascii messages are now properly handled in Python 2 (#1998). Thanks @nicoddemus for the PR.
  • Fixed cyclic reference when pytest.raises is used in context-manager form (#1965). Also as a result of this fix, sys.exc_info() is left empty in both context-manager and function call usages. Previously, sys.exc_info would contain the exception caught by the context manager, even when the expected exception occurred. Thanks @MSeifert04 for the report and the PR.
  • Fixed false-positives warnings from assertion rewrite hook for modules that were rewritten but were later marked explicitly by pytest.register_assert_rewrite or implicitly as a plugin (#2005). Thanks @RonnyPfannschmidt for the report and @nicoddemus for the PR.
  • Report teardown output on test failure (#442). Thanks @matclab for the PR.
  • Fix teardown error message in generated xUnit XML. Thanks @gdyuldin for the PR.
  • Properly handle exceptions in multiprocessing tasks (#1984). Thanks @adborden for the report and @nicoddemus for the PR.
  • Clean up unittest TestCase objects after tests are complete (#1649). Thanks @d_b_w for the report and PR.

3.0.3 (2016-09-28)

  • The ids argument to parametrize again accepts unicode strings in Python 2 (#1905). Thanks @philpep for the report and @nicoddemus for the PR.
  • Assertions are now being rewritten for plugins in development mode (pip install -e) (#1934). Thanks @nicoddemus for the PR.
  • Fix pkg_resources import error in Jython projects (#1853). Thanks @raquel-ucl for the PR.
  • Got rid of AttributeError: 'Module' object has no attribute '_obj' exception in Python 3 (#1944). Thanks @axil for the PR.
  • Explain a bad scope value passed to @fixture declarations or a MetaFunc.parametrize() call. Thanks @tgoodlet for the PR.
  • This version includes pluggy-0.4.0, which correctly handles VersionConflict errors in plugins (#704). Thanks @nicoddemus for the PR.

3.0.2 (2016-09-01)

  • Improve error message when passing non-string ids to pytest.mark.parametrize (#1857). Thanks @okken for the report and @nicoddemus for the PR.
  • Add buffer attribute to stdin stub class pytest.capture.DontReadFromInput Thanks @joguSD for the PR.
  • Fix UnicodeEncodeError when string comparison with unicode has failed. (#1864) Thanks @AiOO for the PR.
  • pytest_plugins is now handled correctly if defined as a string (as opposed as a sequence of strings) when modules are considered for assertion rewriting. Due to this bug, much more modules were being rewritten than necessary if a test suite uses pytest_plugins to load internal plugins (#1888). Thanks @jaraco for the report and @nicoddemus for the PR (#1891).
  • Do not call tearDown and cleanups when running tests from unittest.TestCase subclasses with --pdb enabled. This allows proper post mortem debugging for all applications which have significant logic in their tearDown machinery (#1890). Thanks @mbyt for the PR.
  • Fix use of deprecated getfuncargvalue method in the internal doctest plugin. Thanks @ViviCoder for the report (#1898).

3.0.1 (2016-08-23)

  • Fix regression when importorskip is used at module level (#1822). Thanks @jaraco and @The-Compiler for the report and @nicoddemus for the PR.
  • Fix parametrization scope when session fixtures are used in conjunction with normal parameters in the same call (#1832). Thanks @The-Compiler for the report, @Kingdread and @nicoddemus for the PR.
  • Fix internal error when parametrizing tests or fixtures using an empty ids argument (#1849). Thanks @OPpuolitaival for the report and @nicoddemus for the PR.
  • Fix loader error when running pytest embedded in a zipfile. Thanks @mbachry for the PR.

3.0.0 (2016-08-18)

Incompatible changes

A number of incompatible changes were made in this release, with the intent of removing features deprecated for a long time or change existing behaviors in order to make them less surprising/more useful.

  • Reinterpretation mode has now been removed. Only plain and rewrite mode are available, consequently the --assert=reinterp option is no longer available. This also means files imported from plugins or will not benefit from improved assertions by default, you should use pytest.register_assert_rewrite() to explicitly turn on assertion rewriting for those files. Thanks @flub for the PR.

  • The following deprecated commandline options were removed:

    • --genscript: no longer supported;
    • --no-assert: use --assert=plain instead;
    • --nomagic: use --assert=plain instead;
    • --report: use -r instead;

    Thanks to @RedBeardCode for the PR (#1664).

  • ImportErrors in plugins now are a fatal error instead of issuing a pytest warning (#1479). Thanks to @The-Compiler for the PR.

  • Removed support code for Python 3 versions < 3.3 (#1627).

  • Removed all py.test-X* entry points. The versioned, suffixed entry points were never documented and a leftover from a pre-virtualenv era. These entry points also created broken entry points in wheels, so removing them also removes a source of confusion for users (#1632). Thanks @obestwalter for the PR.

  • pytest.skip() now raises an error when used to decorate a test function, as opposed to its original intent (to imperatively skip a test inside a test function). Previously this usage would cause the entire module to be skipped (#607). Thanks @omarkohl for the complete PR (#1519).

  • Exit tests if a collection error occurs. A poll indicated most users will hit CTRL-C anyway as soon as they see collection errors, so pytest might as well make that the default behavior (#1421). A --continue-on-collection-errors option has been added to restore the previous behaviour. Thanks @olegpidsadnyi and @omarkohl for the complete PR (#1628).

  • Renamed the pytest pdb module (plugin) into debugging to avoid clashes with the builtin pdb module.

  • Raise a helpful failure message when requesting a parametrized fixture at runtime, e.g. with request.getfixturevalue. Previously these parameters were simply never defined, so a fixture decorated like @pytest.fixture(params=[0, 1, 2]) only ran once (#460). Thanks to @nikratio for the bug report, @RedBeardCode and @tomviner for the PR.

  • _pytest.monkeypatch.monkeypatch class has been renamed to _pytest.monkeypatch.MonkeyPatch so it doesn’t conflict with the monkeypatch fixture.

  • --exitfirst / -x can now be overridden by a following --maxfail=N and is just a synonym for --maxfail=1.

New Features

  • Support nose-style __test__ attribute on methods of classes, including unittest-style Classes. If set to False, the test will not be collected.

  • New doctest_namespace fixture for injecting names into the namespace in which doctests run. Thanks @milliams for the complete PR (#1428).

  • New --doctest-report option available to change the output format of diffs when running (failing) doctests (implements #1749). Thanks @hartym for the PR.

  • New name argument to pytest.fixture decorator which allows a custom name for a fixture (to solve the funcarg-shadowing-fixture problem). Thanks @novas0x2a for the complete PR (#1444).

  • New approx() function for easily comparing floating-point numbers in tests. Thanks @kalekundert for the complete PR (#1441).

  • Ability to add global properties in the final xunit output file by accessing the internal junitxml plugin (experimental). Thanks @tareqalayan for the complete PR #1454).

  • New ExceptionInfo.match() method to match a regular expression on the string representation of an exception (#372). Thanks @omarkohl for the complete PR (#1502).

  • __tracebackhide__ can now also be set to a callable which then can decide whether to filter the traceback based on the ExceptionInfo object passed to it. Thanks @The-Compiler for the complete PR (#1526).

  • New pytest_make_parametrize_id(config, val) hook which can be used by plugins to provide friendly strings for custom types. Thanks @palaviv for the PR.

  • capsys and capfd now have a disabled() context-manager method, which can be used to temporarily disable capture within a test. Thanks @nicoddemus for the PR.

  • New cli flag --fixtures-per-test: shows which fixtures are being used for each selected test item. Features doc strings of fixtures by default. Can also show where fixtures are defined if combined with -v. Thanks @hackebrot for the PR.

  • Introduce pytest command as recommended entry point. Note that py.test still works and is not scheduled for removal. Closes proposal #1629. Thanks @obestwalter and @davehunt for the complete PR (#1633).

  • New cli flags:

    • --setup-plan: performs normal collection and reports the potential setup and teardown and does not execute any fixtures and tests;
    • --setup-only: performs normal collection, executes setup and teardown of fixtures and reports them;
    • --setup-show: performs normal test execution and additionally shows setup and teardown of fixtures;
    • --keep-duplicates: py.test now ignores duplicated paths given in the command line. To retain the previous behavior where the same test could be run multiple times by specifying it in the command-line multiple times, pass the --keep-duplicates argument (#1609);

    Thanks @d6e, @kvas-it, @sallner, @ioggstream and @omarkohl for the PRs.

  • New CLI flag --override-ini/-o: overrides values from the ini file. For example: "-o xfail_strict=True"’. Thanks @blueyed and @fengxx for the PR.

  • New hooks:

    • pytest_fixture_setup(fixturedef, request): executes fixture setup;
    • pytest_fixture_post_finalizer(fixturedef): called after the fixture’s finalizer and has access to the fixture’s result cache.

    Thanks @d6e, @sallner.

  • Issue warnings for asserts whose test is a tuple literal. Such asserts will never fail because tuples are always truthy and are usually a mistake (see #1562). Thanks @kvas-it, for the PR.

  • Allow passing a custom debugger class (e.g. --pdbcls=IPython.core.debugger:Pdb). Thanks to @anntzer for the PR.


  • Plugins now benefit from assertion rewriting. Thanks @sober7, @nicoddemus and @flub for the PR.
  • Change report.outcome for xpassed tests to "passed" in non-strict mode and "failed" in strict mode. Thanks to @hackebrot for the PR (#1795) and @gprasad84 for report (#1546).
  • Tests marked with xfail(strict=False) (the default) now appear in JUnitXML reports as passing tests instead of skipped. Thanks to @hackebrot for the PR (#1795).
  • Highlight path of the file location in the error report to make it easier to copy/paste. Thanks @suzaku for the PR (#1778).
  • Fixtures marked with @pytest.fixture can now use yield statements exactly like those marked with the @pytest.yield_fixture decorator. This change renders @pytest.yield_fixture deprecated and makes @pytest.fixture with yield statements the preferred way to write teardown code (#1461). Thanks @csaftoiu for bringing this to attention and @nicoddemus for the PR.
  • Explicitly passed parametrize ids do not get escaped to ascii (#1351). Thanks @ceridwen for the PR.
  • Fixtures are now sorted in the error message displayed when an unknown fixture is declared in a test function. Thanks @nicoddemus for the PR.
  • pytest_terminal_summary hook now receives the exitstatus of the test session as argument. Thanks @blueyed for the PR (#1809).
  • Parametrize ids can accept None as specific test id, in which case the automatically generated id for that argument will be used. Thanks @palaviv for the complete PR (#1468).
  • The parameter to xunit-style setup/teardown methods (setup_method, setup_module, etc.) is now optional and may be omitted. Thanks @okken for bringing this to attention and @nicoddemus for the PR.
  • Improved automatic id generation selection in case of duplicate ids in parametrize. Thanks @palaviv for the complete PR (#1474).
  • Now pytest warnings summary is shown up by default. Added a new flag --disable-pytest-warnings to explicitly disable the warnings summary (#1668).
  • Make ImportError during collection more explicit by reminding the user to check the name of the test module/package(s) (#1426). Thanks @omarkohl for the complete PR (#1520).
  • Add build/ and dist/ to the default --norecursedirs list. Thanks @mikofski for the report and @tomviner for the PR (#1544).
  • pytest.raises in the context manager form accepts a custom message to raise when no exception occurred. Thanks @palaviv for the complete PR (#1616).
  • files now benefit from assertion rewriting; previously it was only available for test modules. Thanks @flub, @sober7 and @nicoddemus for the PR (#1619).
  • Text documents without any doctests no longer appear as “skipped”. Thanks @graingert for reporting and providing a full PR (#1580).
  • Ensure that a module within a namespace package can be found when it is specified on the command line together with the --pyargs option. Thanks to @taschini for the PR (#1597).
  • Always include full assertion explanation during assertion rewriting. The previous behaviour was hiding sub-expressions that happened to be False, assuming this was redundant information. Thanks @bagerard for reporting (#1503). Thanks to @davehunt and @tomviner for the PR.
  • OptionGroup.addoption() now checks if option names were already added before, to make it easier to track down issues like #1618. Before, you only got exceptions later from argparse library, giving no clue about the actual reason for double-added options.
  • yield-based tests are considered deprecated and will be removed in pytest-4.0. Thanks @nicoddemus for the PR.
  • [pytest] sections in setup.cfg files should now be named [tool:pytest] to avoid conflicts with other distutils commands (see #567). [pytest] sections in pytest.ini or tox.ini files are supported and unchanged. Thanks @nicoddemus for the PR.
  • Using pytest_funcarg__ prefix to declare fixtures is considered deprecated and will be removed in pytest-4.0 (#1684). Thanks @nicoddemus for the PR.
  • Passing a command-line string to pytest.main() is considered deprecated and scheduled for removal in pytest-4.0. It is recommended to pass a list of arguments instead (#1723).
  • Rename getfuncargvalue to getfixturevalue. getfuncargvalue is still present but is now considered deprecated. Thanks to @RedBeardCode and @tomviner for the PR (#1626).
  • optparse type usage now triggers DeprecationWarnings (#1740).
  • optparse backward compatibility supports float/complex types (#457).
  • Refined logic for determining the rootdir, considering only valid paths which fixes a number of issues: #1594, #1435 and #1471. Updated the documentation according to current behavior. Thanks to @blueyed, @davehunt and @matthiasha for the PR.
  • Always include full assertion explanation. The previous behaviour was hiding sub-expressions that happened to be False, assuming this was redundant information. Thanks @bagerard for reporting (#1503). Thanks to @davehunt and @tomviner for PR.
  • Better message in case of not using parametrized variable (see #1539). Thanks to @tramwaj29 for the PR.
  • Updated docstrings with a more uniform style.
  • Add stderr write for pytest.exit(msg) during startup. Previously the message was never shown. Thanks @BeyondEvil for reporting #1210. Thanks to @JonathonSonesen and @tomviner for the PR.
  • No longer display the incorrect test deselection reason (#1372). Thanks @ronnypfannschmidt for the PR.
  • The --resultlog command line option has been deprecated: it is little used and there are more modern and better alternatives (see #830). Thanks @nicoddemus for the PR.
  • Improve error message with fixture lookup errors: add an ‘E’ to the first line and ‘>’ to the rest. Fixes #717. Thanks @blueyed for reporting and a PR, @eolo999 for the initial PR and @tomviner for his guidance during EuroPython2016 sprint.

Bug Fixes

  • Parametrize now correctly handles duplicated test ids.
  • Fix internal error issue when the method argument is missing for teardown_method() (#1605).
  • Fix exception visualization in case the current working directory (CWD) gets deleted during testing (#1235). Thanks @bukzor for reporting. PR by @marscher.
  • Improve test output for logical expression with brackets (#925). Thanks @DRMacIver for reporting and @RedBeardCode for the PR.
  • Create correct diff for strings ending with newlines (#1553). Thanks @Vogtinator for reporting and @RedBeardCode and @tomviner for the PR.
  • ConftestImportFailure now shows the traceback making it easier to identify bugs in files (#1516). Thanks @txomon for the PR.
  • Text documents without any doctests no longer appear as “skipped”. Thanks @graingert for reporting and providing a full PR (#1580).
  • Fixed collection of classes with custom __new__ method. Fixes #1579. Thanks to @Stranger6667 for the PR.
  • Fixed scope overriding inside metafunc.parametrize (#634). Thanks to @Stranger6667 for the PR.
  • Fixed the total tests tally in junit xml output (#1798). Thanks to @cryporchild for the PR.
  • Fixed off-by-one error with lines from request.node.warn. Thanks to @blueyed for the PR.

2.9.2 (2016-05-31)

Bug Fixes

  • fix #510: skip tests where one parameterize dimension was empty thanks Alex Stapleton for the Report and @RonnyPfannschmidt for the PR
  • Fix Xfail does not work with condition keyword argument. Thanks @astraw38 for reporting the issue (#1496) and @tomviner for PR the (#1524).
  • Fix win32 path issue when putting custom config file with absolute path in pytest.main("-c your_absolute_path").
  • Fix maximum recursion depth detection when raised error class is not aware of unicode/encoded bytes. Thanks @prusse-martin for the PR (#1506).
  • Fix pytest.mark.skip mark when used in strict mode. Thanks @pquentin for the PR and @RonnyPfannschmidt for showing how to fix the bug.
  • Minor improvements and fixes to the documentation. Thanks @omarkohl for the PR.
  • Fix --fixtures to show all fixture definitions as opposed to just one per fixture name. Thanks to @hackebrot for the PR.

2.9.1 (2016-03-17)

Bug Fixes

  • Improve error message when a plugin fails to load. Thanks @nicoddemus for the PR.
  • Fix (#1178): with non-ascii characters raises an internal pytest error. Thanks @nicoddemus for the PR.
  • Fix (#469): junit parses report.nodeid incorrectly, when params IDs contain ::. Thanks @tomviner for the PR (#1431).
  • Fix (#578): SyntaxErrors containing non-ascii lines at the point of failure generated an internal py.test error. Thanks @asottile for the report and @nicoddemus for the PR.
  • Fix (#1437): When passing in a bytestring regex pattern to parameterize attempt to decode it as utf-8 ignoring errors.
  • Fix (#649): parametrized test nodes cannot be specified to run on the command line.
  • Fix (#138): better reporting for python 3.3+ chained exceptions

2.9.0 (2016-02-29)

New Features

  • New pytest.mark.skip mark, which unconditionally skips marked tests. Thanks @MichaelAquilina for the complete PR (#1040).
  • --doctest-glob may now be passed multiple times in the command-line. Thanks @jab and @nicoddemus for the PR.
  • New -rp and -rP reporting options give the summary and full output of passing tests, respectively. Thanks to @codewarrior0 for the PR.
  • pytest.mark.xfail now has a strict option, which makes XPASS tests to fail the test suite (defaulting to False). There’s also a xfail_strict ini option that can be used to configure it project-wise. Thanks @rabbbit for the request and @nicoddemus for the PR (#1355).
  • Parser.addini now supports options of type bool. Thanks @nicoddemus for the PR.
  • New ALLOW_BYTES doctest option. This strips b prefixes from byte strings in doctest output (similar to ALLOW_UNICODE). Thanks @jaraco for the request and @nicoddemus for the PR (#1287).
  • Give a hint on KeyboardInterrupt to use the --fulltrace option to show the errors. Fixes #1366. Thanks to @hpk42 for the report and @RonnyPfannschmidt for the PR.
  • Catch IndexError exceptions when getting exception source location. Fixes a pytest internal error for dynamically generated code (fixtures and tests) where source lines are fake by intention.


  • Important: py.code has been merged into the pytest repository as pytest._code. This decision was made because py.code had very few uses outside pytest and the fact that it was in a different repository made it difficult to fix bugs on its code in a timely manner. The team hopes with this to be able to better refactor out and improve that code. This change shouldn’t affect users, but it is useful to let users aware if they encounter any strange behavior.

    Keep in mind that the code for pytest._code is private and experimental, so you definitely should not import it explicitly!

    Please note that the original py.code is still available in pylib.

  • pytest_enter_pdb now optionally receives the pytest config object. Thanks @nicoddemus for the PR.

  • Removed code and documentation for Python 2.5 or lower versions, including removal of the obsolete _pytest.assertion.oldinterpret module. Thanks @nicoddemus for the PR (#1226).

  • Comparisons now always show up in full when CI or BUILD_NUMBER is found in the environment, even when -vv isn’t used. Thanks @The-Compiler for the PR.

  • --lf and --ff now support long names: --last-failed and --failed-first respectively. Thanks @MichaelAquilina for the PR.

  • Added expected exceptions to pytest.raises fail message.

  • Collection only displays progress (“collecting X items”) when in a terminal. This avoids cluttering the output when using --color=yes to obtain colors in CI integrations systems (#1397).

Bug Fixes

  • The -s and -c options should now work under xdist; Config.fromdictargs now represents its input much more faithfully. Thanks to @bukzor for the complete PR (#680).
  • Fix (#1290): support Python 3.5’s @ operator in assertion rewriting. Thanks @Shinkenjoe for report with test case and @tomviner for the PR.
  • Fix formatting utf-8 explanation messages (#1379). Thanks @biern for the PR.
  • Fix traceback style docs to describe all of the available options (auto/long/short/line/native/no), with auto being the default since v2.6. Thanks @hackebrot for the PR.
  • Fix (#1422): junit record_xml_property doesn’t allow multiple records with same name.

2.8.7 (2016-01-24)

  • fix #1338: use predictable object resolution for monkeypatch

2.8.6 (2016-01-21)

  • fix #1259: allow for double nodeids in junitxml, this was a regression failing plugins combinations like pytest-pep8 + pytest-flakes
  • Workaround for exception that occurs in pyreadline when using --pdb with standard I/O capture enabled. Thanks Erik M. Bray for the PR.
  • fix #900: Better error message in case the target of a monkeypatch call raises an ImportError.
  • fix #1292: monkeypatch calls (setattr, setenv, etc.) are now O(1). Thanks David R. MacIver for the report and Bruno Oliveira for the PR.
  • fix #1223: captured stdout and stderr are now properly displayed before entering pdb when --pdb is used instead of being thrown away. Thanks Cal Leeming for the PR.
  • fix #1305: pytest warnings emitted during pytest_terminal_summary are now properly displayed. Thanks Ionel Maries Cristian for the report and Bruno Oliveira for the PR.
  • fix #628: fixed internal UnicodeDecodeError when doctests contain unicode. Thanks Jason R. Coombs for the report and Bruno Oliveira for the PR.
  • fix #1334: Add captured stdout to jUnit XML report on setup error. Thanks Georgy Dyuldin for the PR.

2.8.5 (2015-12-11)

  • fix #1243: fixed issue where class attributes injected during collection could break pytest. PR by Alexei Kozlenok, thanks Ronny Pfannschmidt and Bruno Oliveira for the review and help.
  • fix #1074: precompute junitxml chunks instead of storing the whole tree in objects Thanks Bruno Oliveira for the report and Ronny Pfannschmidt for the PR
  • fix #1238: fix pytest.deprecated_call() receiving multiple arguments (Regression introduced in 2.8.4). Thanks Alex Gaynor for the report and Bruno Oliveira for the PR.

2.8.4 (2015-12-06)

  • fix #1190: deprecated_call() now works when the deprecated function has been already called by another test in the same module. Thanks Mikhail Chernykh for the report and Bruno Oliveira for the PR.
  • fix #1198: --pastebin option now works on Python 3. Thanks Mehdy Khoshnoody for the PR.
  • fix #1219: --pastebin now works correctly when captured output contains non-ascii characters. Thanks Bruno Oliveira for the PR.
  • fix #1204: another error when collecting with a nasty __getattr__(). Thanks Florian Bruhin for the PR.
  • fix the summary printed when no tests did run. Thanks Florian Bruhin for the PR.
  • fix #1185 - ensure exactly matches what should go to a sdist
  • a number of documentation modernizations wrt good practices. Thanks Bruno Oliveira for the PR.

2.8.3 (2015-11-18)

  • fix #1169: add __name__ attribute to testcases in TestCaseFunction to support the @unittest.skip decorator on functions and methods. Thanks Lee Kamentsky for the PR.
  • fix #1035: collecting tests if test module level obj has __getattr__(). Thanks Suor for the report and Bruno Oliveira / Tom Viner for the PR.
  • fix #331: don’t collect tests if their failure cannot be reported correctly e.g. they are a callable instance of a class.
  • fix #1133: fixed internal error when filtering tracebacks where one entry belongs to a file which is no longer available. Thanks Bruno Oliveira for the PR.
  • enhancement made to highlight in red the name of the failing tests so they stand out in the output. Thanks Gabriel Reis for the PR.
  • add more talks to the documentation
  • extend documentation on the –ignore cli option
  • use pytest-runner for setuptools integration
  • minor fixes for interaction with OS X El Capitan system integrity protection (thanks Florian)

2.8.2 (2015-10-07)

  • fix #1085: proper handling of encoding errors when passing encoded byte strings to pytest.parametrize in Python 2. Thanks Themanwithoutaplan for the report and Bruno Oliveira for the PR.
  • fix #1087: handling SystemError when passing empty byte strings to pytest.parametrize in Python 3. Thanks Paul Kehrer for the report and Bruno Oliveira for the PR.
  • fix #995: fixed internal error when filtering tracebacks where one entry was generated by an exec() statement. Thanks Daniel Hahler, Ashley C Straw, Philippe Gauthier and Pavel Savchenko for contributing and Bruno Oliveira for the PR.
  • fix #1100 and #1057: errors when using autouse fixtures and doctest modules. Thanks Sergey B Kirpichev and Vital Kudzelka for contributing and Bruno Oliveira for the PR.

2.8.1 (2015-09-29)

  • fix #1034: Add missing nodeid on pytest_logwarning call in addhook. Thanks Simon Gomizelj for the PR.
  • ‘deprecated_call’ is now only satisfied with a DeprecationWarning or PendingDeprecationWarning. Before 2.8.0, it accepted any warning, and 2.8.0 made it accept only DeprecationWarning (but not PendingDeprecationWarning). Thanks Alex Gaynor for the issue and Eric Hunsberger for the PR.
  • fix issue #1073: avoid calling __getattr__ on potential plugin objects. This fixes an incompatibility with pytest-django. Thanks Andreas Pelme, Bruno Oliveira and Ronny Pfannschmidt for contributing and Holger Krekel for the fix.
  • Fix issue #704: handle versionconflict during plugin loading more gracefully. Thanks Bruno Oliveira for the PR.
  • Fix issue #1064: “”–junitxml” regression when used with the “pytest-xdist” plugin, with test reports being assigned to the wrong tests. Thanks Daniel Grunwald for the report and Bruno Oliveira for the PR.
  • (experimental) adapt more SEMVER style versioning and change meaning of master branch in git repo: “master” branch now keeps the bugfixes, changes aimed for micro releases. “features” branch will only be released with minor or major pytest releases.
  • Fix issue #766 by removing documentation references to distutils. Thanks Russel Winder.
  • Fix issue #1030: now byte-strings are escaped to produce item node ids to make them always serializable. Thanks Andy Freeland for the report and Bruno Oliveira for the PR.
  • Python 2: if unicode parametrized values are convertible to ascii, their ascii representation is used for the node id.
  • Fix issue #411: Add __eq__ method to assertion comparison example. Thanks Ben Webb.
  • Fix issue #653: deprecated_call can be used as context manager.
  • fix issue 877: properly handle assertion explanations with non-ascii repr Thanks Mathieu Agopian for the report and Ronny Pfannschmidt for the PR.
  • fix issue 1029: transform errors when writing cache values into pytest-warnings

2.8.0 (2015-09-18)

  • new --lf and -ff options to run only the last failing tests or “failing tests first” from the last run. This functionality is provided through porting the formerly external pytest-cache plugin into pytest core. BACKWARD INCOMPAT: if you used pytest-cache’s functionality to persist data between test runs be aware that we don’t serialize sets anymore. Thanks Ronny Pfannschmidt for most of the merging work.

  • “-r” option now accepts “a” to include all possible reports, similar to passing “fEsxXw” explicitly (isse960). Thanks Abhijeet Kasurde for the PR.

  • avoid python3.5 deprecation warnings by introducing version specific inspection helpers, thanks Michael Droettboom.

  • fix issue562: now fully respected.

  • fix issue934: when string comparison fails and a diff is too large to display without passing -vv, still show a few lines of the diff. Thanks Florian Bruhin for the report and Bruno Oliveira for the PR.

  • fix issue736: Fix a bug where fixture params would be discarded when combined with parametrization markers. Thanks to Markus Unterwaditzer for the PR.

  • fix issue710: introduce ALLOW_UNICODE doctest option: when enabled, the u prefix is stripped from unicode strings in expected doctest output. This allows doctests which use unicode to run in Python 2 and 3 unchanged. Thanks Jason R. Coombs for the report and Bruno Oliveira for the PR.

  • parametrize now also generates meaningful test IDs for enum, regex and class objects (as opposed to class instances). Thanks to Florian Bruhin for the PR.

  • Add ‘warns’ to assert that warnings are thrown (like ‘raises’). Thanks to Eric Hunsberger for the PR.

  • Fix issue683: Do not apply an already applied mark. Thanks ojake for the PR.

  • Deal with capturing failures better so fewer exceptions get lost to /dev/null. Thanks David Szotten for the PR.

  • fix issue730: deprecate and warn about the –genscript option. Thanks Ronny Pfannschmidt for the report and Christian Pommranz for the PR.

  • fix issue751: multiple parametrize with ids bug if it parametrizes class with two or more test methods. Thanks Sergey Chipiga for reporting and Jan Bednarik for PR.

  • fix issue82: avoid loading conftest files from setup.cfg/pytest.ini/tox.ini files and upwards by default (–confcutdir can still be set to override this). Thanks Bruno Oliveira for the PR.

  • fix issue768: docstrings found in python modules were not setting up session fixtures. Thanks Jason R. Coombs for reporting and Bruno Oliveira for the PR.

  • added tmpdir_factory, a session-scoped fixture that can be used to create directories under the base temporary directory. Previously this object was installed as a _tmpdirhandler attribute of the config object, but now it is part of the official API and using config._tmpdirhandler is deprecated. Thanks Bruno Oliveira for the PR.

  • fix issue808: pytest’s internal assertion rewrite hook now implements the optional PEP302 get_data API so tests can access data files next to them. Thanks xmo-odoo for request and example and Bruno Oliveira for the PR.

  • rootdir and inifile are now displayed during usage errors to help users diagnose problems such as unexpected ini files which add unknown options being picked up by pytest. Thanks to Pavel Savchenko for bringing the problem to attention in #821 and Bruno Oliveira for the PR.

  • Summary bar now is colored yellow for warning situations such as: all tests either were skipped or xpass/xfailed, or no tests were run at all (this is a partial fix for issue500).

  • fix issue812: pytest now exits with status code 5 in situations where no tests were run at all, such as the directory given in the command line does not contain any tests or as result of a command line option filters all out all tests (-k for example). Thanks Eric Siegerman (issue812) and Bruno Oliveira for the PR.

  • Summary bar now is colored yellow for warning situations such as: all tests either were skipped or xpass/xfailed, or no tests were run at all (related to issue500). Thanks Eric Siegerman.

  • New testpaths ini option: list of directories to search for tests when executing pytest from the root directory. This can be used to speed up test collection when a project has well specified directories for tests, being usually more practical than configuring norecursedirs for all directories that do not contain tests. Thanks to Adrian for idea (#694) and Bruno Oliveira for the PR.

  • fix issue713: JUnit XML reports for doctest failures. Thanks Punyashloka Biswal.

  • fix issue970: internal pytest warnings now appear as “pytest-warnings” in the terminal instead of “warnings”, so it is clear for users that those warnings are from pytest and not from the builtin “warnings” module. Thanks Bruno Oliveira.

  • Include setup and teardown in junitxml test durations. Thanks Janne Vanhala.

  • fix issue735: assertion failures on debug versions of Python 3.4+

  • new option --import-mode to allow to change test module importing behaviour to append to sys.path instead of prepending. This better allows to run test modules against installed versions of a package even if the package under test has the same import root. In this example:


    the tests will run against the installed version of pkg_under_test when --import-mode=append is used whereas by default they would always pick up the local version. Thanks Holger Krekel.

  • pytester: add method TmpTestdir.delete_loaded_modules(), and call it from inline_run() to allow temporary modules to be reloaded. Thanks Eduardo Schettino.

  • internally refactor pluginmanager API and code so that there is a clear distinction between a pytest-agnostic rather simple pluginmanager and the PytestPluginManager which adds a lot of behaviour, among it handling of the local conftest files. In terms of documented methods this is a backward compatible change but it might still break 3rd party plugins which relied on details like especially the pluginmanager.add_shutdown() API. Thanks Holger Krekel.

  • pluginmanagement: introduce pytest.hookimpl and pytest.hookspec decorators for setting impl/spec specific parameters. This substitutes the previous now deprecated use of pytest.mark which is meant to contain markers for test functions only.

  • write/refine docs for “writing plugins” which now have their own page and are separate from the “using/installing plugins`` page.

  • fix issue732: properly unregister plugins from any hook calling sites allowing to have temporary plugins during test execution.

  • deprecate and warn about __multicall__ argument in hook implementations. Use the hookwrapper mechanism instead already introduced with pytest-2.7.

  • speed up pytest’s own test suite considerably by using inprocess tests by default (testrun can be modified with –runpytest=subprocess to create subprocesses in many places instead). The main APIs to run pytest in a test is “runpytest()” or “runpytest_subprocess” and “runpytest_inprocess” if you need a particular way of running the test. In all cases you get back a RunResult but the inprocess one will also have a “reprec” attribute with the recorded events/reports.

  • fix monkeypatch.setattr(“x.y”, raising=False) to actually not raise if “y” is not a pre-existing attribute. Thanks Florian Bruhin.

  • fix issue741: make running output from copy/pasteable Thanks Bruno Oliveira.

  • add a new --noconftest argument which ignores all files.

  • add file and line attributes to JUnit-XML output.

  • fix issue890: changed extension of all documentation files from txt to rst. Thanks to Abhijeet for the PR.

  • fix issue714: add ability to apply indirect=True parameter on particular argnames. Thanks Elizaveta239.

  • fix issue890: changed extension of all documentation files from txt to rst. Thanks to Abhijeet for the PR.

  • fix issue957: “# doctest: SKIP” option will now register doctests as SKIPPED rather than PASSED. Thanks Thomas Grainger for the report and Bruno Oliveira for the PR.

  • issue951: add new record_xml_property fixture, that supports logging additional information on xml output. Thanks David Diaz for the PR.

  • issue949: paths after normal options (for example -s, -v, etc) are now properly used to discover rootdir and ini files. Thanks Peter Lauri for the report and Bruno Oliveira for the PR.

2.7.3 (2015-09-15)

  • Allow ‘dev’, ‘rc’, or other non-integer version strings in importorskip. Thanks to Eric Hunsberger for the PR.
  • fix issue856: consider –color parameter in all outputs (for example –fixtures). Thanks Barney Gale for the report and Bruno Oliveira for the PR.
  • fix issue855: passing str objects as plugins argument to pytest.main is now interpreted as a module name to be imported and registered as a plugin, instead of silently having no effect. Thanks xmo-odoo for the report and Bruno Oliveira for the PR.
  • fix issue744: fix for ast.Call changes in Python 3.5+. Thanks Guido van Rossum, Matthias Bussonnier, Stefan Zimmermann and Thomas Kluyver.
  • fix issue842: applying markers in classes no longer propagate this markers to superclasses which also have markers. Thanks xmo-odoo for the report and Bruno Oliveira for the PR.
  • preserve warning functions after call to pytest.deprecated_call. Thanks Pieter Mulder for PR.
  • fix issue854: autouse yield_fixtures defined as class members of unittest.TestCase subclasses now work as expected. Thannks xmo-odoo for the report and Bruno Oliveira for the PR.
  • fix issue833: –fixtures now shows all fixtures of collected test files, instead of just the fixtures declared on the first one. Thanks Florian Bruhin for reporting and Bruno Oliveira for the PR.
  • fix issue863: skipped tests now report the correct reason when a skip/xfail condition is met when using multiple markers. Thanks Raphael Pierzina for reporting and Bruno Oliveira for the PR.
  • optimized tmpdir fixture initialization, which should make test sessions faster (specially when using pytest-xdist). The only visible effect is that now pytest uses a subdirectory in the $TEMP directory for all directories created by this fixture (defaults to $TEMP/pytest-$USER). Thanks Bruno Oliveira for the PR.

2.7.2 (2015-06-23)

  • fix issue767: pytest.raises value attribute does not contain the exception instance on Python 2.6. Thanks Eric Siegerman for providing the test case and Bruno Oliveira for PR.
  • Automatically create directory for junitxml and results log. Thanks Aron Curzon.
  • fix issue713: JUnit XML reports for doctest failures. Thanks Punyashloka Biswal.
  • fix issue735: assertion failures on debug versions of Python 3.4+ Thanks Benjamin Peterson.
  • fix issue114: skipif marker reports to internal skipping plugin; Thanks Floris Bruynooghe for reporting and Bruno Oliveira for the PR.
  • fix issue748: unittest.SkipTest reports to internal pytest unittest plugin. Thanks Thomas De Schampheleire for reporting and Bruno Oliveira for the PR.
  • fix issue718: failed to create representation of sets containing unsortable elements in python 2. Thanks Edison Gustavo Muenz.
  • fix issue756, fix issue752 (and similar issues): depend on py-1.4.29 which has a refined algorithm for traceback generation.

2.7.1 (2015-05-19)

  • fix issue731: do not get confused by the braces which may be present and unbalanced in an object’s repr while collapsing False explanations. Thanks Carl Meyer for the report and test case.
  • fix issue553: properly handling inspect.getsourcelines failures in FixtureLookupError which would lead to an internal error, obfuscating the original problem. Thanks talljosh for initial diagnose/patch and Bruno Oliveira for final patch.
  • fix issue660: properly report scope-mismatch-access errors independently from ordering of fixture arguments. Also avoid the pytest internal traceback which does not provide information to the user. Thanks Holger Krekel.
  • streamlined and documented release process. Also all versions (in and documentation generation) are now read from _pytest/ Thanks Holger Krekel.
  • fixed docs to remove the notion that yield-fixtures are experimental. They are here to stay :) Thanks Bruno Oliveira.
  • Support building wheels by using environment markers for the requirements. Thanks Ionel Maries Cristian.
  • fixed regression to 2.6.4 which surfaced e.g. in lost stdout capture printing when tests raised SystemExit. Thanks Holger Krekel.
  • reintroduced _pytest fixture of the pytester plugin which is used at least by pytest-xdist.

2.7.0 (2015-03-26)

  • fix issue435: make reload() work when assert rewriting is active. Thanks Daniel Hahler.
  • fix issue616: files and their contained fixutres are now properly considered for visibility, independently from the exact current working directory and test arguments that are used. Many thanks to Eric Siegerman and his PR235 which contains systematic tests for conftest visibility and now passes. This change also introduces the concept of a rootdir which is printed as a new pytest header and documented in the pytest customize web page.
  • change reporting of “diverted” tests, i.e. tests that are collected in one file but actually come from another (e.g. when tests in a test class come from a base class in a different file). We now show the nodeid and indicate via a postfix the other file.
  • add ability to set command line options by environment variable PYTEST_ADDOPTS.
  • added documentation on the new pytest-dev teams on bitbucket and github. See . Thanks to Anatoly for pushing and initial work on this.
  • fix issue650: new option --docttest-ignore-import-errors which will turn import errors in doctests into skips. Thanks Charles Cloud for the complete PR.
  • fix issue655: work around different ways that cause python2/3 to leak sys.exc_info into fixtures/tests causing failures in 3rd party code
  • fix issue615: assertion rewriting did not correctly escape % signs when formatting boolean operations, which tripped over mixing booleans with modulo operators. Thanks to Tom Viner for the report, triaging and fix.
  • implement issue351: add ability to specify parametrize ids as a callable to generate custom test ids. Thanks Brianna Laugher for the idea and implementation.
  • introduce and document new hookwrapper mechanism useful for plugins which want to wrap the execution of certain hooks for their purposes. This supersedes the undocumented __multicall__ protocol which pytest itself and some external plugins use. Note that pytest-2.8 is scheduled to drop supporting the old __multicall__ and only support the hookwrapper protocol.
  • majorly speed up invocation of plugin hooks
  • use hookwrapper mechanism in builtin pytest plugins.
  • add a doctest ini option for doctest flags, thanks Holger Peters.
  • add note to docs that if you want to mark a parameter and the parameter is a callable, you also need to pass in a reason to disambiguate it from the “decorator” case. Thanks Tom Viner.
  • “python_classes” and “python_functions” options now support glob-patterns for test discovery, as discussed in issue600. Thanks Ldiary Translations.
  • allow to override parametrized fixtures with non-parametrized ones and vice versa (bubenkoff).
  • fix issue463: raise specific error for ‘parameterize’ misspelling (pfctdayelise).
  • On failure, the sys.last_value, sys.last_type and sys.last_traceback are set, so that a user can inspect the error via postmortem debugging (almarklein).

2.6.4 (2014-10-24)

  • Improve assertion failure reporting on iterables, by using ndiff and pprint.
  • removed outdated japanese docs from source tree.
  • docs for “pytest_addhooks” hook. Thanks Bruno Oliveira.
  • updated plugin index docs. Thanks Bruno Oliveira.
  • fix issue557: with “-k” we only allow the old style “-” for negation at the beginning of strings and even that is deprecated. Use “not” instead. This should allow to pick parametrized tests where “-” appeared in the parameter.
  • fix issue604: Escape % character in the assertion message.
  • fix issue620: add explanation in the –genscript target about what the binary blob means. Thanks Dinu Gherman.
  • fix issue614: fixed pastebin support.
  • fix issue620: add explanation in the –genscript target about what the binary blob means. Thanks Dinu Gherman.
  • fix issue614: fixed pastebin support.

2.6.3 (2014-09-24)

  • fix issue575: xunit-xml was reporting collection errors as failures instead of errors, thanks Oleg Sinyavskiy.
  • fix issue582: fix setuptools example, thanks Laszlo Papp and Ronny Pfannschmidt.
  • Fix infinite recursion bug when pickling capture.EncodedFile, thanks Uwe Schmitt.
  • fix issue589: fix bad interaction with numpy and others when showing exceptions. Check for precise “maximum recursion depth exceed” exception instead of presuming any RuntimeError is that one (implemented in py dep). Thanks Charles Cloud for analysing the issue.
  • fix conftest related fixture visibility issue: when running with a CWD outside of a test package pytest would get fixture discovery wrong. Thanks to Wolfgang Schnerring for figuring out a reproducible example.
  • Introduce pytest_enter_pdb hook (needed e.g. by pytest_timeout to cancel the timeout when interactively entering pdb). Thanks Wolfgang Schnerring.
  • check xfail/skip also with non-python function test items. Thanks Floris Bruynooghe.

2.6.2 (2014-09-05)

  • Added function pytest.freeze_includes(), which makes it easy to embed pytest into executables using tools like cx_freeze. See docs for examples and rationale. Thanks Bruno Oliveira.
  • Improve assertion rewriting cache invalidation precision.
  • fixed issue561: adapt autouse fixture example for python3.
  • fixed issue453: assertion rewriting issue with __repr__ containing “n{“, “n}” and “n~”.
  • fix issue560: correctly display code if an “else:” or “finally:” is followed by statements on the same line.
  • Fix example in monkeypatch documentation, thanks t-8ch.
  • fix issue572: correct tmpdir doc example for python3.
  • Do not mark as universal wheel because Python 2.6 is different from other builds due to the extra argparse dependency. Fixes issue566. Thanks sontek.
  • Implement issue549: user-provided assertion messages now no longer replace the py.test introspection message but are shown in addition to them.

2.6.1 (2014-08-07)

  • No longer show line numbers in the –verbose output, the output is now purely the nodeid. The line number is still shown in failure reports. Thanks Floris Bruynooghe.
  • fix issue437 where assertion rewriting could cause pytest-xdist slaves to collect different tests. Thanks Bruno Oliveira.
  • fix issue555: add “errors” attribute to capture-streams to satisfy some distutils and possibly other code accessing sys.stdout.errors.
  • fix issue547 capsys/capfd also work when output capturing (“-s”) is disabled.
  • address issue170: allow pytest.mark.xfail(…) to specify expected exceptions via an optional “raises=EXC” argument where EXC can be a single exception or a tuple of exception classes. Thanks David Mohr for the complete PR.
  • fix integration of pytest with unittest.mock.patch decorator when it uses the “new” argument. Thanks Nicolas Delaby for test and PR.
  • fix issue with detecting conftest files if the arguments contain “::” node id specifications (copy pasted from “-v” output)
  • fix issue544 by only removing “@NUM” at the end of “::” separated parts and if the part has a “.py” extension
  • don’t use py.std import helper, rather import things directly. Thanks Bruno Oliveira.


  • Cache exceptions from fixtures according to their scope (issue 467).
  • fix issue537: Avoid importing old assertion reinterpretation code by default.
  • fix issue364: shorten and enhance tracebacks representation by default. The new “–tb=auto” option (default) will only display long tracebacks for the first and last entry. You can get the old behaviour of printing all entries as long entries with “–tb=long”. Also short entries by default are now printed very similarly to “–tb=native” ones.
  • fix issue514: teach assertion reinterpretation about private class attributes
  • change -v output to include full node IDs of tests. Users can copy a node ID from a test run, including line number, and use it as a positional argument in order to run only a single test.
  • fix issue 475: fail early and comprehensible if calling pytest.raises with wrong exception type.
  • fix issue516: tell in getting-started about current dependencies.
  • cleanup a bit and specify supported versions. Thanks Jurko Gospodnetic for the PR.
  • change XPASS colour to yellow rather then red when tests are run with -v.
  • fix issue473: work around mock putting an unbound method into a class dict when double-patching.
  • fix issue498: if a fixture finalizer fails, make sure that the fixture is still invalidated.
  • fix issue453: the result of the pytest_assertrepr_compare hook now gets it’s newlines escaped so that format_exception does not blow up.
  • internal new warning system: pytest will now produce warnings when it detects oddities in your test collection or execution. Warnings are ultimately sent to a new pytest_logwarning hook which is currently only implemented by the terminal plugin which displays warnings in the summary line and shows more details when -rw (report on warnings) is specified.
  • change skips into warnings for test classes with an __init__ and callables in test modules which look like a test but are not functions.
  • fix issue436: improved finding of initial conftest files from command line arguments by using the result of parse_known_args rather than the previous flaky heuristics. Thanks Marc Abramowitz for tests and initial fixing approaches in this area.
  • fix issue #479: properly handle nose/unittest(2) SkipTest exceptions during collection/loading of test modules. Thanks to Marc Schlaich for the complete PR.
  • fix issue490: include pytest_load_initial_conftests in documentation and improve docstring.
  • fix issue472: clarify that pytest.config.getvalue() cannot work if it’s triggered ahead of command line parsing.
  • merge PR123: improved integration with mock.patch decorator on tests.
  • fix issue412: messing with stdout/stderr FD-level streams is now captured without crashes.
  • fix issue483: trial/py33 works now properly. Thanks Daniel Grana for PR.
  • improve example for pytest integration with “python test” which now has a generic “-a” or “–pytest-args” option where you can pass additional options as a quoted string. Thanks Trevor Bekolay.
  • simplified internal capturing mechanism and made it more robust against tests or setups changing FD1/FD2, also better integrated now with pytest.pdb() in single tests.
  • improvements to pytest’s own test-suite leakage detection, courtesy of PRs from Marc Abramowitz
  • fix issue492: avoid leak in test_writeorg. Thanks Marc Abramowitz.
  • fix issue493: don’t run tests in doc directory with python test (use tox -e doctesting for that)
  • fix issue486: better reporting and handling of early conftest loading failures
  • some cleanup and simplification of internal conftest handling.
  • work a bit harder to break reference cycles when catching exceptions. Thanks Jurko Gospodnetic.
  • fix issue443: fix skip examples to use proper comparison. Thanks Alex Groenholm.
  • support nose-style __test__ attribute on modules, classes and functions, including unittest-style Classes. If set to False, the test will not be collected.
  • fix issue512: show “<notset>” for arguments which might not be set in monkeypatch plugin. Improves output in documentation.

2.5.2 (2014-01-29)

  • fix issue409 – better interoperate with cx_freeze by not trying to import from which causes problems for py27/cx_freeze. Thanks Wolfgang L. for reporting and tracking it down.
  • fixed docs and code to use “pytest” instead of “py.test” almost everywhere. Thanks Jurko Gospodnetic for the complete PR.
  • fix issue425: mention at end of “py.test -h” that –markers and –fixtures work according to specified test path (or current dir)
  • fix issue413: exceptions with unicode attributes are now printed correctly also on python2 and with pytest-xdist runs. (the fix requires py-1.4.20)
  • copy, cleanup and integrate capture from pylib 1.4.20.dev2 (rev 13d9af95547e)
  • address issue416: clarify docs as to loading semantics
  • fix issue429: comparing byte strings with non-ascii chars in assert expressions now work better. Thanks Floris Bruynooghe.
  • make capfd/capsys.capture private, its unused and shouldn’t be exposed

2.5.1 (2013-12-17)

  • merge new documentation styling PR from Tobias Bieniek.
  • fix issue403: allow parametrize of multiple same-name functions within a collection node. Thanks Andreas Kloeckner and Alex Gaynor for reporting and analysis.
  • Allow parameterized fixtures to specify the ID of the parameters by adding an ids argument to pytest.fixture() and pytest.yield_fixture(). Thanks Floris Bruynooghe.
  • fix issue404 by always using the binary xml escape in the junitxml plugin. Thanks Ronny Pfannschmidt.
  • fix issue407: fix addoption docstring to point to argparse instead of optparse. Thanks Daniel D. Wright.

2.5.0 (2013-12-12)

  • dropped python2.5 from automated release testing of pytest itself which means it’s probably going to break soon (but still works with this release we believe).

  • simplified and fixed implementation for calling finalizers when parametrized fixtures or function arguments are involved. finalization is now performed lazily at setup time instead of in the “teardown phase”. While this might sound odd at first, it helps to ensure that we are correctly handling setup/teardown even in complex code. User-level code should not be affected unless it’s implementing the pytest_runtest_teardown hook and expecting certain fixture instances are torn down within (very unlikely and would have been unreliable anyway).

  • PR90: add –color=yes|no|auto option to force terminal coloring mode (“auto” is default). Thanks Marc Abramowitz.

  • fix issue319 - correctly show unicode in assertion errors. Many thanks to Floris Bruynooghe for the complete PR. Also means we depend on py>=1.4.19 now.

  • fix issue396 - correctly sort and finalize class-scoped parametrized tests independently from number of methods on the class.

  • refix issue323 in a better way – parametrization should now never cause Runtime Recursion errors because the underlying algorithm for re-ordering tests per-scope/per-fixture is not recursive anymore (it was tail-call recursive before which could lead to problems for more than >966 non-function scoped parameters).

  • fix issue290 - there is preliminary support now for parametrizing with repeated same values (sometimes useful to test if calling a second time works as with the first time).

  • close issue240 - document precisely how pytest module importing works, discuss the two common test directory layouts, and how it interacts with PEP420-namespace packages.

  • fix issue246 fix finalizer order to be LIFO on independent fixtures depending on a parametrized higher-than-function scoped fixture. (was quite some effort so please bear with the complexity of this sentence :) Thanks Ralph Schmitt for the precise failure example.

  • fix issue244 by implementing special index for parameters to only use indices for paramentrized test ids

  • fix issue287 by running all finalizers but saving the exception from the first failing finalizer and re-raising it so teardown will still have failed. We reraise the first failing exception because it might be the cause for other finalizers to fail.

  • fix ordering when mock.patch or other standard decorator-wrappings are used with test methods. This fixues issue346 and should help with random “xdist” collection failures. Thanks to Ronny Pfannschmidt and Donald Stufft for helping to isolate it.

  • fix issue357 - special case “-k” expressions to allow for filtering with simple strings that are not valid python expressions. Examples: “-k 1.3” matches all tests parametrized with 1.3. “-k None” filters all tests that have “None” in their name and conversely “-k ‘not None’”. Previously these examples would raise syntax errors.

  • fix issue384 by removing the trial support code since the unittest compat enhancements allow trial to handle it on its own

  • don’t hide an ImportError when importing a plugin produces one. fixes issue375.

  • fix issue275 - allow usefixtures and autouse fixtures for running doctest text files.

  • fix issue380 by making –resultlog only rely on longrepr instead of the “reprcrash” attribute which only exists sometimes.

  • address issue122: allow @pytest.fixture(params=iterator) by exploding into a list early on.

  • fix pexpect-3.0 compatibility for pytest’s own tests. (fixes issue386)

  • allow nested parametrize-value markers, thanks James Lan for the PR.

  • fix unicode handling with new monkeypatch.setattr(import_path, value) API. Thanks Rob Dennis. Fixes issue371.

  • fix unicode handling with junitxml, fixes issue368.

  • In assertion rewriting mode on Python 2, fix the detection of coding cookies. See issue #330.

  • make “–runxfail” turn imperative pytest.xfail calls into no ops (it already did neutralize pytest.mark.xfail markers)

  • refine pytest / pkg_resources interactions: The AssertionRewritingHook PEP302 compliant loader now registers itself with setuptools/pkg_resources properly so that the pkg_resources.resource_stream method works properly. Fixes issue366. Thanks for the investigations and full PR to Jason R. Coombs.

  • pytestconfig fixture is now session-scoped as it is the same object during the whole test run. Fixes issue370.

  • avoid one surprising case of marker malfunction/confusion:

    @pytest.mark.some(lambda arg: ...)
    def test_function():

    would not work correctly because pytest assumes @pytest.mark.some gets a function to be decorated already. We now at least detect if this arg is a lambda and thus the example will work. Thanks Alex Gaynor for bringing it up.

  • xfail a test on pypy that checks wrong encoding/ascii (pypy does not error out). fixes issue385.

  • internally make varnames() deal with classes’s __init__, although it’s not needed by pytest itself atm. Also fix caching. Fixes issue376.

  • fix issue221 - handle importing of namespace-package with no properly.

  • refactor internal FixtureRequest handling to avoid monkeypatching. One of the positive user-facing effects is that the “request” object can now be used in closures.

  • fixed version comparison in pytest.importskip(modname, minverstring)

  • fix issue377 by clarifying in the nose-compat docs that pytest does not duplicate the unittest-API into the “plain” namespace.

  • fix verbose reporting for @mock’d test functions

2.4.2 (2013-10-04)

  • on Windows require colorama and a newer py lib so that now uses colorama instead of its own ctypes hacks. (fixes issue365) thanks Paul Moore for bringing it up.
  • fix “-k” matching of tests where “repr” and “attr” and other names would cause wrong matches because of an internal implementation quirk (don’t ask) which is now properly implemented. fixes issue345.
  • avoid tmpdir fixture to create too long filenames especially when parametrization is used (issue354)
  • fix pytest-pep8 and pytest-flakes / pytest interactions (collection names in mark plugin was assuming an item always has a function which is not true for those plugins etc.) Thanks Andi Zeidler.
  • introduce node.get_marker/node.add_marker API for plugins like pytest-pep8 and pytest-flakes to avoid the messy details of the node.keywords pseudo-dicts. Adapted docs.
  • remove attempt to “dup” stdout at startup as it’s icky. the normal capturing should catch enough possibilities of tests messing up standard FDs.
  • add pluginmanager.do_configure(config) as a link to config.do_configure() for plugin-compatibility

2.4.1 (2013-10-02)

  • When using parser.addoption() unicode arguments to the “type” keyword should also be converted to the respective types. thanks Floris Bruynooghe, @dnozay. (fixes issue360 and issue362)
  • fix dotted filename completion when using argcomplete thanks Anthon van der Neuth. (fixes issue361)
  • fix regression when a 1-tuple (“arg”,) is used for specifying parametrization (the values of the parametrization were passed nested in a tuple). Thanks Donald Stufft.
  • merge doc typo fixes, thanks Andy Dirnberger


known incompatibilities:

  • if calling –genscript from python2.7 or above, you only get a standalone script which works on python2.7 or above. Use Python2.6 to also get a python2.5 compatible version.
  • all xunit-style teardown methods (nose-style, pytest-style, unittest-style) will not be called if the corresponding setup method failed, see issue322 below.
  • the pytest_plugin_unregister hook wasn’t ever properly called and there is no known implementation of the hook - so it got removed.
  • pytest.fixture-decorated functions cannot be generators (i.e. use yield) anymore. This change might be reversed in 2.4.1 if it causes unforeseen real-life issues. However, you can always write and return an inner function/generator and change the fixture consumer to iterate over the returned generator. This change was done in lieu of the new pytest.yield_fixture decorator, see below.

new features:

  • experimentally introduce a new pytest.yield_fixture decorator which accepts exactly the same parameters as pytest.fixture but mandates a yield statement instead of a return statement from fixture functions. This allows direct integration with “with-style” context managers in fixture functions and generally avoids registering of finalization callbacks in favour of treating the “after-yield” as teardown code. Thanks Andreas Pelme, Vladimir Keleshev, Floris Bruynooghe, Ronny Pfannschmidt and many others for discussions.

  • allow boolean expression directly with skipif/xfail if a “reason” is also specified. Rework skipping documentation to recommend “condition as booleans” because it prevents surprises when importing markers between modules. Specifying conditions as strings will remain fully supported.

  • reporting: color the last line red or green depending if failures/errors occurred or everything passed. thanks Christian Theunert.

  • make “import pdb ; pdb.set_trace()” work natively wrt capturing (no “-s” needed anymore), making pytest.set_trace() a mere shortcut.

  • fix issue181: –pdb now also works on collect errors (and on internal errors) . This was implemented by a slight internal refactoring and the introduction of a new hook pytest_exception_interact hook (see next item).

  • fix issue341: introduce new experimental hook for IDEs/terminals to intercept debugging: pytest_exception_interact(node, call, report).

  • new monkeypatch.setattr() variant to provide a shorter invocation for patching out classes/functions from modules:

    monkeypatch.setattr(“requests.get”, myfunc)

    will replace the “get” function of the “requests” module with myfunc.

  • fix issue322: tearDownClass is not run if setUpClass failed. Thanks Mathieu Agopian for the initial fix. Also make all of pytest/nose finalizer mimic the same generic behaviour: if a setupX exists and fails, don’t run teardownX. This internally introduces a new method “node.addfinalizer()” helper which can only be called during the setup phase of a node.

  • simplify pytest.mark.parametrize() signature: allow to pass a CSV-separated string to specify argnames. For example: pytest.mark.parametrize("input,expected",  [(1,2), (2,3)]) works as well as the previous: pytest.mark.parametrize(("input", "expected"), ...).

  • add support for setUpModule/tearDownModule detection, thanks Brian Okken.

  • integrate tab-completion on options through use of “argcomplete”. Thanks Anthon van der Neut for the PR.

  • change option names to be hyphen-separated long options but keep the old spelling backward compatible. py.test -h will only show the hyphenated version, for example “–collect-only” but “–collectonly” will remain valid as well (for backward-compat reasons). Many thanks to Anthon van der Neut for the implementation and to Hynek Schlawack for pushing us.

  • fix issue 308 - allow to mark/xfail/skip individual parameter sets when parametrizing. Thanks Brianna Laugher.

  • call new experimental pytest_load_initial_conftests hook to allow 3rd party plugins to do something before a conftest is loaded.

Bug fixes:

  • fix issue358 - capturing options are now parsed more properly by using a new parser.parse_known_args method.
  • pytest now uses argparse instead of optparse (thanks Anthon) which means that “argparse” is added as a dependency if installing into python2.6 environments or below.
  • fix issue333: fix a case of bad unittest/pytest hook interaction.
  • PR27: correctly handle nose.SkipTest during collection. Thanks Antonio Cuni, Ronny Pfannschmidt.
  • fix issue355: junitxml puts name=”pytest” attribute to testsuite tag.
  • fix issue336: autouse fixture in plugins should work again.
  • fix issue279: improve object comparisons on assertion failure for standard datatypes and recognise Thanks to Brianna Laugher and Mathieu Agopian.
  • fix issue317: assertion rewriter support for the is_package method
  • fix issue335: document py.code.ExceptionInfo() object returned from pytest.raises(), thanks Mathieu Agopian.
  • remove implicit distribute_setup support from
  • fix issue305: ignore any problems when writing pyc files.
  • SO-17664702: call fixture finalizers even if the fixture function partially failed (finalizers would not always be called before)
  • fix issue320 - fix class scope for fixtures when mixed with module-level functions. Thanks Anatloy Bubenkoff.
  • you can specify “-q” or “-qq” to get different levels of “quieter” reporting (thanks Katarzyna Jachim)
  • fix issue300 - Fix order of conftest loading when starting py.test in a subdirectory.
  • fix issue323 - sorting of many module-scoped arg parametrizations
  • make sessionfinish hooks execute with the same cwd-context as at session start (helps fix plugin behaviour which write output files with relative path such as pytest-cov)
  • fix issue316 - properly reference collection hooks in docs
  • fix issue 306 - cleanup of -k/-m options to only match markers/test names/keywords respectively. Thanks Wouter van Ackooy.
  • improved doctest counting for doctests in python modules – files without any doctest items will not show up anymore and doctest examples are counted as separate test items. thanks Danilo Bellini.
  • fix issue245 by depending on the released py-1.4.14 which fixes to work with files with no mode. Thanks Jason R. Coombs.
  • fix junitxml generation when test output contains control characters, addressing issue267, thanks Jaap Broekhuizen
  • fix issue338: honor –tb style for setup/teardown errors as well. Thanks Maho.
  • fix issue307 - use yaml.safe_load in example, thanks Mark Eichin.
  • better parametrize error messages, thanks Brianna Laugher
  • pytest_terminal_summary(terminalreporter) hooks can now use “.section(title)” and “.line(msg)” methods to print extra information at the end of a test run.

2.3.5 (2013-04-30)

  • fix issue169: respect –tb=style with setup/teardown errors as well.
  • never consider a fixture function for test function collection
  • allow re-running of test items / helps to fix pytest-reruntests plugin and also help to keep less fixture/resource references alive
  • put captured stdout/stderr into junitxml output even for passing tests (thanks Adam Goucher)
  • Issue 265 - integrate nose setup/teardown with setupstate so it doesn’t try to teardown if it did not setup
  • issue 271 - don’t write junitxml on slave nodes
  • Issue 274 - don’t try to show full doctest example when doctest does not know the example location
  • issue 280 - disable assertion rewriting on buggy CPython 2.6.0
  • inject “getfixture()” helper to retrieve fixtures from doctests, thanks Andreas Zeidler
  • issue 259 - when assertion rewriting, be consistent with the default source encoding of ASCII on Python 2
  • issue 251 - report a skip instead of ignoring classes with init
  • issue250 unicode/str mixes in parametrization names and values now works
  • issue257, assertion-triggered compilation of source ending in a comment line doesn’t blow up in python2.5 (fixed through py>=1.4.13.dev6)
  • fix –genscript option to generate standalone scripts that also work with python3.3 (importer ordering)
  • issue171 - in assertion rewriting, show the repr of some global variables
  • fix option help for “-k”
  • move long description of distribution into README.rst
  • improve docstring for metafunc.parametrize()
  • fix bug where using capsys with pytest.set_trace() in a test function would break when looking at capsys.readouterr()
  • allow to specify prefixes starting with “_” when customizing python_functions test discovery. (thanks Graham Horler)
  • improve PYTEST_DEBUG tracing output by putting extra data on a new lines with additional indent
  • ensure OutcomeExceptions like skip/fail have initialized exception attributes
  • issue 260 - don’t use nose special setup on plain unittest cases
  • fix issue134 - print the collect errors that prevent running specified test items
  • fix issue266 - accept unicode in MarkEvaluator expressions

2.3.4 (2012-11-20)

  • yielded test functions will now have autouse-fixtures active but cannot accept fixtures as funcargs - it’s anyway recommended to rather use the post-2.0 parametrize features instead of yield, see:
  • fix autouse-issue where autouse-fixtures would not be discovered if defined in an a/ file and tests in a/tests/
  • fix issue226 - LIFO ordering for fixture teardowns
  • fix issue224 - invocations with >256 char arguments now work
  • fix issue91 - add/discuss package/directory level setups in example
  • allow to dynamically define markers via item.keywords[…]=assignment integrating with “-m” option
  • make “-k” accept an expressions the same as with “-m” so that one can write: -k “name1 or name2” etc. This is a slight incompatibility if you used special syntax like “TestClass.test_method” which you now need to write as -k “TestClass and test_method” to match a certain method in a certain test class.

2.3.3 (2012-11-06)

  • fix issue214 - parse modules that contain special objects like e. g. flask’s request object which blows up on getattr access if no request is active. thanks Thomas Waldmann.
  • fix issue213 - allow to parametrize with values like numpy arrays that do not support an __eq__ operator
  • fix issue215 - split into multiple files
  • fix issue148 - @unittest.skip on classes is now recognized and avoids calling setUpClass/tearDownClass, thanks Pavel Repin
  • fix issue209 - reintroduce python2.4 support by depending on newer pylib which re-introduced statement-finding for pre-AST interpreters
  • nose support: only call setup if it’s a callable, thanks Andrew Taumoefolau
  • fix issue219 - add py2.4-3.3 classifiers to TROVE list
  • in tracebacks ,* arg values are now shown next to normal arguments (thanks Manuel Jacob)
  • fix issue217 - support mock.patch with pytest’s fixtures - note that you need either mock-1.0.1 or the python3.3 builtin unittest.mock.
  • fix issue127 - improve documentation for pytest_addoption() and add a config.getoption(name) helper function for consistency.

2.3.2 (2012-10-25)

  • fix issue208 and fix issue29 use new py version to avoid long pauses when printing tracebacks in long modules
  • fix issue205 - conftests in subdirs customizing pytest_pycollect_makemodule and pytest_pycollect_makeitem now work properly
  • fix teardown-ordering for parametrized setups
  • fix issue127 - better documentation for pytest_addoption and related objects.
  • fix unittest behaviour: TestCase.runtest only called if there are test methods defined
  • improve trial support: don’t collect its empty unittest.TestCase.runTest() method
  • “python test” now works with pytest itself
  • fix/improve internal/packaging related bits:
    • exception message check of now passes on python33 as well
    • issue206 - fix to work when a global PYTHONDONTWRITEBYTECODE=1 is present
    • add tox.ini to pytest distribution so that ignore-dirs and others config bits are properly distributed for maintainers who run pytest-own tests

2.3.1 (2012-10-20)

  • fix issue202 - fix regression: using “self” from fixture functions now works as expected (it’s the same “self” instance that a test method which uses the fixture sees)
  • skip pexpect using tests ( mostly) on freebsd* systems due to pexpect not supporting it properly (hanging)
  • link to web pages from –markers output which provides help for pytest.mark.* usage.

2.3.0 (2012-10-19)

  • fix issue202 - better automatic names for parametrized test functions
  • fix issue139 - introduce @pytest.fixture which allows direct scoping and parametrization of funcarg factories.
  • fix issue198 - conftest fixtures were not found on windows32 in some circumstances with nested directory structures due to path manipulation issues
  • fix issue193 skip test functions with were parametrized with empty parameter sets
  • fix python3.3 compat, mostly reporting bits that previously depended on dict ordering
  • introduce re-ordering of tests by resource and parametrization setup which takes precedence to the usual file-ordering
  • fix issue185 monkeypatching time.time does not cause pytest to fail
  • fix issue172 duplicate call of pytest.fixture decoratored setup_module functions
  • fix junitxml=path construction so that if tests change the current working directory and the path is a relative path it is constructed correctly from the original current working dir.
  • fix “python test” example to cause a proper “errno” return
  • fix issue165 - fix broken doc links and mention stackoverflow for FAQ
  • catch unicode-issues when writing failure representations to terminal to prevent the whole session from crashing
  • fix xfail/skip confusion: a skip-mark or an imperative pytest.skip will now take precedence before xfail-markers because we can’t determine xfail/xpass status in case of a skip. see also:
  • always report installed 3rd party plugins in the header of a test run
  • fix issue160: a failing setup of an xfail-marked tests should be reported as xfail (not xpass)
  • fix issue128: show captured output when capsys/capfd are used
  • fix issue179: properly show the dependency chain of factories
  • pluginmanager.register(…) now raises ValueError if the plugin has been already registered or the name is taken
  • fix issue159: improve especially with respect to the “magic” history, also mention pytest-django, trial and unittest integration.
  • make request.keywords and node.keywords writable. All descendant collection nodes will see keyword values. Keywords are dictionaries containing markers and other info.
  • fix issue 178: xml binary escapes are now wrapped in py.xml.raw
  • fix issue 176: correctly catch the builtin AssertionError even when we replaced AssertionError with a subclass on the python level
  • factory discovery no longer fails with magic global callables that provide no sane __code__ object ( for example)
  • fix issue 182: testdir.inprocess_run now considers passed plugins
  • fix issue 188: ensure sys.exc_info is clear on python2
    before calling into a test
  • fix issue 191: add unittest TestCase runTest method support
  • fix issue 156: monkeypatch correctly handles class level descriptors
  • reporting refinements:
    • pytest_report_header now receives a “startdir” so that you can use startdir.bestrelpath(yourpath) to show nice relative path
    • allow plugins to implement both pytest_report_header and pytest_sessionstart (sessionstart is invoked first).
    • don’t show deselected reason line if there is none
    • py.test -vv will show all of assert comparisons instead of truncating

2.2.4 (2012-05-22)

  • fix error message for rewritten assertions involving the % operator
  • fix issue 126: correctly match all invalid xml characters for junitxml binary escape
  • fix issue with unittest: now @unittest.expectedFailure markers should be processed correctly (you can also use @pytest.mark markers)
  • document integration with the extended distribute/setuptools test commands
  • fix issue 140: properly get the real functions of bound classmethods for setup/teardown_class
  • fix issue #141: switch from the deceased to
  • fix issue #143: call unconfigure/sessionfinish always when configure/sessionstart where called
  • fix issue #144: better mangle test ids to junitxml classnames
  • upgrade to 0.6.27

2.2.3 (2012-02-05)

  • fix uploaded package to only include necessary files

2.2.2 (2012-02-05)

  • fix issue101: wrong args to unittest.TestCase test function now produce better output
  • fix issue102: report more useful errors and hints for when a test directory was renamed and some pyc/__pycache__ remain
  • fix issue106: allow parametrize to be applied multiple times e.g. from module, class and at function level.
  • fix issue107: actually perform session scope finalization
  • don’t check in parametrize if indirect parameters are funcarg names
  • add chdir method to monkeypatch funcarg
  • fix crash resulting from calling monkeypatch undo a second time
  • fix issue115: make –collectonly robust against early failure (missing files/directories)
  • “-qq –collectonly” now shows only files and the number of tests in them
  • “-q –collectonly” now shows test ids
  • allow adding of attributes to test reports such that it also works with distributed testing (no upgrade of pytest-xdist needed)

2.2.1 (2011-12-16)

  • fix issue99 (in pytest and py) internallerrors with resultlog now produce better output - fixed by normalizing pytest_internalerror input arguments.
  • fix issue97 / traceback issues (in pytest and py) improve traceback output in conjunction with jinja2 and cython which hack tracebacks
  • fix issue93 (in pytest and pytest-xdist) avoid “delayed teardowns”: the final test in a test node will now run its teardown directly instead of waiting for the end of the session. Thanks Dave Hunt for the good reporting and feedback. The pytest_runtest_protocol as well as the pytest_runtest_teardown hooks now have “nextitem” available which will be None indicating the end of the test run.
  • fix collection crash due to unknown-source collected items, thanks to Ralf Schmitt (fixed by depending on a more recent pylib)

2.2.0 (2011-11-18)

  • fix issue90: introduce eager tearing down of test items so that teardown function are called earlier.
  • add an all-powerful metafunc.parametrize function which allows to parametrize test function arguments in multiple steps and therefore from independent plugins and places.
  • add a @pytest.mark.parametrize helper which allows to easily call a test function with different argument values
  • Add examples to the “parametrize” example page, including a quick port of Test scenarios and the new parametrize function and decorator.
  • introduce registration for “pytest.mark.*” helpers via ini-files or through plugin hooks. Also introduce a “–strict” option which will treat unregistered markers as errors allowing to avoid typos and maintain a well described set of markers for your test suite. See exaples at and its links.
  • issue50: introduce “-m marker” option to select tests based on markers (this is a stricter and more predictable version of ‘-k’ in that “-m” only matches complete markers and has more obvious rules for and/or semantics.
  • new feature to help optimizing the speed of your tests: –durations=N option for displaying N slowest test calls and setup/teardown methods.
  • fix issue87: –pastebin now works with python3
  • fix issue89: –pdb with unexpected exceptions in doctest work more sensibly
  • fix and cleanup pytest’s own test suite to not leak FDs
  • fix issue83: link to generated funcarg list
  • fix issue74: pyarg module names are now checked against imp.find_module false positives
  • fix compatibility with twisted/trial-11.1.0 use cases
  • simplify Node.listchain
  • simplify junitxml output code by relying on py.xml
  • add support for skip properties on unittest classes and functions

2.1.3 (2011-10-18)

  • fix issue79: assertion rewriting failed on some comparisons in boolops
  • correctly handle zero length arguments (a la pytest ‘’)
  • fix issue67 / junitxml now contains correct test durations, thanks ronny
  • fix issue75 / skipping test failure on jython
  • fix issue77 / Allow assertrepr_compare hook to apply to a subset of tests

2.1.2 (2011-09-24)

  • fix assertion rewriting on files with windows newlines on some Python versions
  • refine test discovery by package/module name (–pyargs), thanks Florian Mayer
  • fix issue69 / assertion rewriting fixed on some boolean operations
  • fix issue68 / packages now work with assertion rewriting
  • fix issue66: use different assertion rewriting caches when the -O option is passed
  • don’t try assertion rewriting on Jython, use reinterp


  • fix issue64 / pytest.set_trace now works within pytest_generate_tests hooks
  • fix issue60 / fix error conditions involving the creation of __pycache__
  • fix issue63 / assertion rewriting on inserts involving strings containing ‘%’
  • fix assertion rewriting on calls with a ** arg
  • don’t cache rewritten modules if bytecode generation is disabled
  • fix assertion rewriting in read-only directories
  • fix issue59: provide system-out/err tags for junitxml output
  • fix issue61: assertion rewriting on boolean operations with 3 or more operands
  • you can now build a man page with “cd doc ; make man”

2.1.0 (2011-07-09)

  • fix issue53 call nosestyle setup functions with correct ordering
  • fix issue58 and issue59: new assertion code fixes
  • merge Benjamin’s assertionrewrite branch: now assertions for test modules on python 2.6 and above are done by rewriting the AST and saving the pyc file before the test module is imported. see doc/assert.txt for more info.
  • fix issue43: improve doctests with better traceback reporting on unexpected exceptions
  • fix issue47: timing output in junitxml for test cases is now correct
  • fix issue48: typo in MarkInfo repr leading to exception
  • fix issue49: avoid confusing error when initizaliation partially fails
  • fix issue44: env/username expansion for junitxml file path
  • show releaselevel information in test runs for pypy
  • reworked doc pages for better navigation and PDF generation
  • report KeyboardInterrupt even if interrupted during session startup
  • fix issue 35 - provide PDF doc version and download link from index page

2.0.3 (2011-05-11)

  • fix issue38: nicer tracebacks on calls to hooks, particularly early configure/sessionstart ones
  • fix missing skip reason/meta information in junitxml files, reported via
  • fix issue34: avoid collection failure with “test” prefixed classes deriving from object.
  • don’t require zlib (and other libs) for genscript plugin without –genscript actually being used.
  • speed up skips (by not doing a full traceback representation internally)
  • fix issue37: avoid invalid characters in junitxml’s output

2.0.2 (2011-03-09)

  • tackle issue32 - speed up test runs of very quick test functions by reducing the relative overhead

  • fix issue30 - extended xfail/skipif handling and improved reporting. If you have a syntax error in your skip/xfail expressions you now get nice error reports.

    Also you can now access module globals from xfail/skipif expressions so that this for example works now:

    import pytest
    import mymodule
    @pytest.mark.skipif("mymodule.__version__[0] == "1")
    def test_function():

    This will not run the test function if the module’s version string does not start with a “1”. Note that specifying a string instead of a boolean expressions allows py.test to report meaningful information when summarizing a test run as to what conditions lead to skipping (or xfail-ing) tests.

  • fix issue28 - setup_method and pytest_generate_tests work together The setup_method fixture method now gets called also for test function invocations generated from the pytest_generate_tests hook.

  • fix issue27 - collectonly and keyword-selection (-k) now work together Also, if you do “py.test –collectonly -q” you now get a flat list of test ids that you can use to paste to the py.test commandline in order to execute a particular test.

  • fix issue25 avoid reported problems with –pdb and python3.2/encodings output

  • fix issue23 - tmpdir argument now works on Python3.2 and WindowsXP Starting with Python3.2 os.symlink may be supported. By requiring a newer py lib version the py.path.local() implementation acknowledges this.

  • fixed typos in the docs (thanks Victor Garcia, Brianna Laugher) and particular thanks to Laura Creighton who also reviewed parts of the documentation.

  • fix slightly wrong output of verbose progress reporting for classes (thanks Amaury)

  • more precise (avoiding of) deprecation warnings for node.Class|Function accesses

  • avoid std unittest assertion helper code in tracebacks (thanks Ronny)

2.0.1 (2011-02-07)

  • refine and unify initial capturing so that it works nicely even if the logging module is used on an early-loaded file or plugin.
  • allow to omit “()” in test ids to allow for uniform test ids as produced by Alfredo’s nice pytest.vim plugin.
  • fix issue12 - show plugin versions with “–version” and “–traceconfig” and also document how to add extra information to reporting test header
  • fix issue17 (import-* reporting issue on python3) by requiring py>1.4.0 (1.4.1 is going to include it)
  • fix issue10 (numpy arrays truth checking) by refining assertion interpretation in py lib
  • fix issue15: make nose compatibility tests compatible with python3 (now that nose-1.0 supports python3)
  • remove somewhat surprising “same-conftest” detection because it ignores when they appear in several subdirs.
  • improve assertions (“not in”), thanks Floris Bruynooghe
  • improve behaviour/warnings when running on top of “python -OO” (assertions and docstrings are turned off, leading to potential false positives)
  • introduce a pytest_cmdline_processargs(args) hook to allow dynamic computation of command line arguments. This fixes a regression because py.test prior to 2.0 allowed to set command line options from files which so far pytest-2.0 only allowed from ini-files now.
  • fix issue7: assert failures in doctest modules. unexpected failures in doctests will not generally show nicer, i.e. within the doctest failing context.
  • fix issue9: setup/teardown functions for an xfail-marked test will report as xfail if they fail but report as normally passing (not xpassing) if they succeed. This only is true for “direct” setup/teardown invocations because teardown_class/ teardown_module cannot closely relate to a single test.
  • fix issue14: no logging errors at process exit
  • refinements to “collecting” output on non-ttys
  • refine internal plugin registration and –traceconfig output
  • introduce a mechanism to prevent/unregister plugins from the command line, see
  • activate resultlog plugin by default
  • fix regression wrt yielded tests which due to the collection-before-running semantics were not setup as with pytest 1.3.4. Note, however, that the recommended and much cleaner way to do test parametraization remains the “pytest_generate_tests” mechanism, see the docs.

2.0.0 (2010-11-25)

  • pytest-2.0 is now its own package and depends on pylib-2.0
  • new ability: python -m pytest / python -m pytest.main ability
  • new python invocation: pytest.main(args, plugins) to load some custom plugins early.
  • try harder to run unittest test suites in a more compatible manner by deferring setup/teardown semantics to the unittest package. also work harder to run twisted/trial and Django tests which should now basically work by default.
  • introduce a new way to set config options via ini-style files, by default setup.cfg and tox.ini files are searched. The old ways (certain environment variables, dynamic reading is removed).
  • add a new “-q” option which decreases verbosity and prints a more nose/unittest-style “dot” output.
  • fix issue135 - marks now work with unittest test cases as well
  • fix issue126 - introduce py.test.set_trace() to trace execution via PDB during the running of tests even if capturing is ongoing.
  • fix issue123 - new “python -m py.test” invocation for py.test (requires Python 2.5 or above)
  • fix issue124 - make reporting more resilient against tests opening files on filedescriptor 1 (stdout).
  • fix issue109 - sibling files will not be loaded. (and Directory collectors cannot be customized anymore from a Directory’s - this needs to happen at least one level up).
  • introduce (customizable) assertion failure representations and enhance output on assertion failures for comparisons and other cases (Floris Bruynooghe)
  • nose-plugin: pass through type-signature failures in setup/teardown functions instead of not calling them (Ed Singleton)
  • remove py.test.collect.Directory (follows from a major refactoring and simplification of the collection process)
  • majorly reduce py.test core code, shift function/python testing to own plugin
  • fix issue88 (finding custom test nodes from command line arg)
  • refine ‘tmpdir’ creation, will now create basenames better associated with test names (thanks Ronny)
  • “xpass” (unexpected pass) tests don’t cause exitcode!=0
  • fix issue131 / issue60 - importing doctests in __init__ files used as namespace packages
  • fix issue93 stdout/stderr is captured while importing
  • fix bug: unittest collected functions now also can have “pytestmark” applied at class/module level
  • add ability to use “class” level for cached_setup helper
  • fix strangeness: mark.* objects are now immutable, create new instances

1.3.4 (2010-09-14)

  • fix issue111: improve install documentation for windows
  • fix issue119: fix custom collectability of as a module
  • fix issue116: –doctestmodules work with files as well
  • fix issue115: unify internal exception passthrough/catching/GeneratorExit
  • fix issue118: new –tb=native for presenting cpython-standard exceptions

1.3.3 (2010-07-30)

  • fix issue113: assertion representation problem with triple-quoted strings (and possibly other cases)
  • make conftest loading detect that a conftest file with the same content was already loaded, avoids surprises in nested directory structures which can be produced e.g. by Hudson. It probably removes the need to use –confcutdir in most cases.
  • fix terminal coloring for win32 (thanks Michael Foord for reporting)
  • fix weirdness: make terminal width detection work on stdout instead of stdin (thanks Armin Ronacher for reporting)
  • remove trailing whitespace in all py/text distribution files

1.3.2 (2010-07-08)

New features

  • fix issue103: introduce py.test.raises as context manager, examples:

    with py.test.raises(ZeroDivisionError):
        x = 0
        1 / x
    with py.test.raises(RuntimeError) as excinfo:
    # you may do extra checks on excinfo.value|type|traceback here

    (thanks Ronny Pfannschmidt)

  • Funcarg factories can now dynamically apply a marker to a test invocation. This is for example useful if a factory provides parameters to a test which are expected-to-fail:

    def pytest_funcarg__arg(request):
        request.applymarker(py.test.mark.xfail(reason="flaky config"))
    def test_function(arg):
  • improved error reporting on collection and import errors. This makes use of a more general mechanism, namely that for custom test item/collect nodes node.repr_failure(excinfo) is now uniformly called so that you can override it to return a string error representation of your choice which is going to be reported as a (red) string.

  • introduce ‘–junitprefix=STR’ option to prepend a prefix to all reports in the junitxml file.

Bug fixes

  • make tests and the pytest_recwarn plugin in particular fully compatible to Python2.7 (if you use the recwarn funcarg warnings will be enabled so that you can properly check for their existence in a cross-python manner).
  • refine –pdb: ignore xfailed tests, unify its TB-reporting and don’t display failures again at the end.
  • fix assertion interpretation with the ** operator (thanks Benjamin Peterson)
  • fix issue105 assignment on the same line as a failing assertion (thanks Benjamin Peterson)
  • fix issue104 proper escaping for test names in junitxml plugin (thanks anonymous)
  • fix issue57 -f|–looponfail to work with xpassing tests (thanks Ronny)
  • fix issue92 collectonly reporter and –pastebin (thanks Benjamin Peterson)
  • fix py.code.compile(source) to generate unique filenames
  • fix assertion re-interp problems on PyPy, by defering code compilation to the (overridable) Frame.eval class. (thanks Amaury Forgeot)
  • fix py.path.local.pyimport() to work with directories
  • streamline py.path.local.mkdtemp implementation and usage
  • don’t print empty lines when showing junitxml-filename
  • add optional boolean ignore_errors parameter to py.path.local.remove
  • fix terminal writing on win32/python2.4
  • py.process.cmdexec() now tries harder to return properly encoded unicode objects on all python versions
  • install plain py.test/py.which scripts also for Jython, this helps to get canonical script paths in virtualenv situations
  • make path.bestrelpath(path) return “.”, note that when calling X.bestrelpath the assumption is that X is a directory.
  • make initial conftest discovery ignore “–” prefixed arguments
  • fix resultlog plugin when used in a multicpu/multihost xdist situation (thanks Jakub Gustak)
  • perform distributed testing related reporting in the xdist-plugin rather than having dist-related code in the generic py.test distribution
  • fix homedir detection on Windows
  • ship version 0.6.13

1.3.1 (2010-05-25)

New features

  • issue91: introduce new py.test.xfail(reason) helper to imperatively mark a test as expected to fail. Can be used from within setup and test functions. This is useful especially for parametrized tests when certain configurations are expected-to-fail. In this case the declarative approach with the @py.test.mark.xfail cannot be used as it would mark all configurations as xfail.

  • issue102: introduce new –maxfail=NUM option to stop test runs after NUM failures. This is a generalization of the ‘-x’ or ‘–exitfirst’ option which is now equivalent to ‘–maxfail=1’. Both ‘-x’ and ‘–maxfail’ will now also print a line near the end indicating the Interruption.

  • issue89: allow py.test.mark decorators to be used on classes (class decorators were introduced with python2.6) and also allow to have multiple markers applied at class/module level by specifying a list.

  • improve and refine letter reporting in the progress bar: . pass f failed test s skipped tests (reminder: use for dependency/platform mismatch only) x xfailed test (test that was expected to fail) X xpassed test (test that was expected to fail but passed)

    You can use any combination of ‘fsxX’ with the ‘-r’ extended reporting option. The xfail/xpass results will show up as skipped tests in the junitxml output - which also fixes issue99.

  • make py.test.cmdline.main() return the exitstatus instead of raising SystemExit and also allow it to be called multiple times. This of course requires that your application and tests are properly teared down and don’t have global state.

Bug Fixes

  • improved traceback presentation: - improved and unified reporting for “–tb=short” option - Errors during test module imports are much shorter, (using –tb=short style) - raises shows shorter more relevant tracebacks - –fulltrace now more systematically makes traces longer / inhibits cutting
  • improve support for raises and other dynamically compiled code by manipulating python’s linecache.cache instead of the previous rather hacky way of creating custom code objects. This makes it seemlessly work on Jython and PyPy where it previously didn’t.
  • fix issue96: make capturing more resilient against Control-C interruptions (involved somewhat substantial refactoring to the underlying capturing functionality to avoid race conditions).
  • fix chaining of conditional skipif/xfail decorators - so it works now as expected to use multiple @py.test.mark.skipif(condition) decorators, including specific reporting which of the conditions lead to skipping.
  • fix issue95: late-import zlib so that it’s not required for general py.test startup.
  • fix issue94: make reporting more robust against bogus source code (and internally be more careful when presenting unexpected byte sequences)

1.3.0 (2010-05-05)

  • deprecate –report option in favour of a new shorter and easier to remember -r option: it takes a string argument consisting of any combination of ‘xfsX’ characters. They relate to the single chars you see during the dotted progress printing and will print an extra line per test at the end of the test run. This extra line indicates the exact position or test ID that you directly paste to the py.test cmdline in order to re-run a particular test.

  • allow external plugins to register new hooks via the new pytest_addhooks(pluginmanager) hook. The new release of the pytest-xdist plugin for distributed and looponfailing testing requires this feature.

  • add a new pytest_ignore_collect(path, config) hook to allow projects and plugins to define exclusion behaviour for their directory structure - for example you may define in a this method:

    def pytest_ignore_collect(path):
        return path.check(link=1)

    to prevent even a collection try of any tests in symlinked dirs.

  • new pytest_pycollect_makemodule(path, parent) hook for allowing customization of the Module collection object for a matching test module.

  • extend and refine xfail mechanism: @py.test.mark.xfail(run=False) do not run the decorated test @py.test.mark.xfail(reason="...") prints the reason string in xfail summaries specifying --runxfail on command line virtually ignores xfail markers

  • expose (previously internal) commonly useful methods: -> return terminal width…) -> print colored/bold text on linux/win32 -> return limited representation string

  • expose test outcome related exceptions as py.test.skip.Exception, py.test.raises.Exception etc., useful mostly for plugins doing special outcome interpretation/tweaking

  • (issue85) fix junitxml plugin to handle tests with non-ascii output

  • fix/refine python3 compatibility (thanks Benjamin Peterson)

  • fixes for making the jython/win32 combination work, note however: jython2.5.1/win32 does not provide a command line launcher, see . See pylib install documentation for how to work around.

  • fixes for handling of unicode exception values and unprintable objects

  • (issue87) fix unboundlocal error in assertionold code

  • (issue86) improve documentation for looponfailing

  • refine IO capturing: stdin-redirect pseudo-file now has a NOP close() method

  • ship version 0.6.10

  • added links to the new capturelog and coverage plugins

1.2.0 (2010-01-18)

  • refined usage and options for “py.cleanup”:

    py.cleanup     # remove "*.pyc" and "*$py.class" (jython) files
    py.cleanup -e .swp -e .cache # also remove files with these extensions
    py.cleanup -s  # remove "build" and "dist" directory next to files
    py.cleanup -d  # also remove empty directories
    py.cleanup -a  # synonym for "-s -d -e 'pip-log.txt'"
    py.cleanup -n  # dry run, only show what would be removed
  • add a new option “py.test –funcargs” which shows available funcargs and their help strings (docstrings on their respective factory function) for a given test path

  • display a short and concise traceback if a funcarg lookup fails

  • early-load “” files in non-dot first-level sub directories. allows to conveniently keep and access test-related options in a test subdir and still add command line options.

  • fix issue67: new super-short traceback-printing option: “–tb=line” will print a single line for each failing (python) test indicating its filename, lineno and the failure value

  • fix issue78: always call python-level teardown functions even if the according setup failed. This includes refinements for calling setup_module/class functions which will now only be called once instead of the previous behaviour where they’d be called multiple times if they raise an exception (including a Skipped exception). Any exception will be re-corded and associated with all tests in the according module/class scope.

  • fix issue63: assume <40 columns to be a bogus terminal width, default to 80

  • fix pdb debugging to be in the correct frame on raises-related errors

  • update to fix an issue where recursive imports might unnecessarily break importing

  • fix plugin links

1.1.1 (2009-11-24)

  • moved dist/looponfailing from py.test core into a new separately released pytest-xdist plugin.
  • new junitxml plugin: –junitxml=path will generate a junit style xml file which is processable e.g. by the Hudson CI system.
  • new option: –genscript=path will generate a standalone py.test script which will not need any libraries installed. thanks to Ralf Schmitt.
  • new option: –ignore will prevent specified path from collection. Can be specified multiple times.
  • new option: –confcutdir=dir will make py.test only consider conftest files that are relative to the specified dir.
  • new funcarg: “pytestconfig” is the pytest config object for access to command line args and can now be easily used in a test.
  • install py.test and py.which with a -$VERSION suffix to disambiguate between Python3, python2.X, Jython and PyPy installed versions.
  • new “pytestconfig” funcarg allows access to test config object
  • new “pytest_report_header” hook can return additional lines to be displayed at the header of a test run.
  • (experimental) allow “py.test path::name1::name2::…” for pointing to a test within a test collection directly. This might eventually evolve as a full substitute to “-k” specifications.
  • streamlined plugin loading: order is now as documented in customize.html: setuptools, ENV, commandline, conftest. also setuptools entry point names are turned to canonical namees (“pytest_*”)
  • automatically skip tests that need ‘capfd’ but have no os.dup
  • allow pytest_generate_tests to be defined in classes as well
  • deprecate usage of ‘disabled’ attribute in favour of pytestmark
  • deprecate definition of Directory, Module, Class and Function nodes in files. Use pytest collect hooks instead.
  • collection/item node specific runtest/collect hooks are only called exactly on matching files, i.e. ones which are exactly below the filesystem path of an item
  • change: the first pytest_collect_directory hook to return something will now prevent further hooks to be called.
  • change: figleaf plugin now requires –figleaf to run. Also change its long command line options to be a bit shorter (see py.test -h).
  • change: pytest doctest plugin is now enabled by default and has a new option –doctest-glob to set a pattern for file matches.
  • change: remove internal py._* helper vars, only keep py._pydir
  • robustify capturing to survive if custom pytest_runtest_setup code failed and prevented the capturing setup code from running.
  • make py.test.* helpers provided by default plugins visible early - works transparently both for pydoc and for interactive sessions which will regularly see e.g. py.test.mark and py.test.importorskip.
  • simplify internal plugin manager machinery
  • simplify internal collection tree by introducing a RootCollector node
  • fix assert reinterpreation that sees a call containing “keyword=…”
  • fix issue66: invoke pytest_sessionstart and pytest_sessionfinish hooks on slaves during dist-testing, report module/session teardown hooks correctly.
  • fix issue65: properly handle dist-testing if no execnet/py lib installed remotely.
  • skip some install-tests if no execnet is available
  • fix docs, fix internal bin/ script generation

1.1.0 (2009-11-05)

  • introduce automatic plugin registration via ‘pytest11’ entrypoints via setuptools’ pkg_resources.iter_entry_points
  • fix py.test dist-testing to work with execnet >= 1.0.0b4
  • re-introduce py.test.cmdline.main() for better backward compatibility
  • svn paths: fix a bug with path.check(versioned=True) for svn paths, allow ‘%’ in svn paths, make svnwc.update() default to interactive mode like in 1.0.x and add svnwc.update(interactive=False) to inhibit interaction.
  • refine distributed tarball to contain test and no pyc files
  • try harder to have deprecation warnings for py.compat.* accesses report a correct location


  • adjust and improve docs
  • remove tool and internal namespace - it was never really advertised and can still be used with the old release if needed. If there is interest it could be revived into its own tool i guess.
  • fix issue48 and issue59: raise an Error if the module from an imported test file does not seem to come from the filepath - avoids “same-name” confusion that has been reported repeatedly
  • merged Ronny’s nose-compatibility hacks: now nose-style setup_module() and setup() functions are supported
  • introduce generalized py.test.mark function marking
  • reshuffle / refine command line grouping
  • deprecate parser.addgroup in favour of getgroup which creates option group
  • add –report command line option that allows to control showing of skipped/xfailed sections
  • generalized skipping: a new way to mark python functions with skipif or xfail at function, class and modules level based on platform or sys-module attributes.
  • extend py.test.mark decorator to allow for positional args
  • introduce and test “py.cleanup -d” to remove empty directories
  • fix issue #59 - robustify unittest test collection
  • make bpython/help interaction work by adding an __all__ attribute to ApiModule, cleanup initpkg
  • use MIT license for pylib, add some contributors
  • remove py.execnet code and substitute all usages with ‘execnet’ proper
  • fix issue50 - cached_setup now caches more to expectations for test functions with multiple arguments.
  • merge Jarko’s fixes, issue #45 and #46
  • add the ability to specify a path for py.lookup to search in
  • fix a funcarg cached_setup bug probably only occurring in distributed testing and “module” scope with teardown.
  • many fixes and changes for making the code base python3 compatible, many thanks to Benjamin Peterson for helping with this.
  • consolidate builtins implementation to be compatible with >=2.3, add helpers to ease keeping 2 and 3k compatible code
  • deprecate py.compat.doctest|subprocess|textwrap|optparse
  • deprecate py.magic.autopath, remove py/magic directory
  • move pytest assertion handling to py/code and a pytest_assertion plugin, add “–no-assert” option, deprecate py.magic namespaces in favour of (less) py.code ones.
  • consolidate and cleanup py/code classes and files
  • cleanup py/misc, move tests to bin-for-dist
  • introduce delattr/delitem/delenv methods to py.test’s monkeypatch funcarg
  • consolidate py.log implementation, remove old approach.
  • introduce and for distinguishing between text/unicode and byte-streams (uses underlying standard lib io.* if available)
  • make py.unittest_convert helper script available which converts “” style files into the simpler assert/direct-test-classes py.test/nosetests style. The script was written by Laura Creighton.
  • simplified internal localpath implementation

1.0.2 (2009-08-27)

  • fixing packaging issues, triggered by fedora redhat packaging, also added doc, examples and contrib dirs to the tarball.
  • added a documentation link to the new django plugin.

1.0.1 (2009-08-19)

  • added a ‘pytest_nose’ plugin which handles nose.SkipTest, nose-style function/method/generator setup/teardown and tries to report functions correctly.
  • capturing of unicode writes or encoded strings to sys.stdout/err work better, also terminalwriting was adapted and somewhat unified between windows and linux.
  • improved documentation layout and content a lot
  • added a “–help-config” option to show / ENV-var names for all longopt cmdline options, and some special variables. renamed ‘conf_capture’ conftest setting to ‘option_capture’ accordingly.
  • fix issue #27: better reporting on non-collectable items given on commandline (e.g. pyc files)
  • fix issue #33: added –version flag (thanks Benjamin Peterson)
  • fix issue #32: adding support for “incomplete” paths to wcpath.status()
  • “Test” prefixed classes are not collected by default anymore if they have an __init__ method
  • monkeypatch setenv() now accepts a “prepend” parameter
  • improved reporting of collection error tracebacks
  • simplified multicall mechanism and plugin architecture, renamed some internal methods and argnames

1.0.0 (2009-08-04)

  • more terse reporting try to show filesystem path relatively to current dir
  • improve xfail output a bit

1.0.0b9 (2009-07-31)

  • cleanly handle and report final teardown of test setup
  • fix svn-1.6 compat issue with py.path.svnwc().versioned() (thanks Wouter Vanden Hove)
  • setup/teardown or collection problems now show as ERRORs or with big “E“‘s in the progress lines. they are reported and counted separately.
  • dist-testing: properly handle test items that get locally collected but cannot be collected on the remote side - often due to platform/dependency reasons
  • simplified py.test.mark API - see keyword plugin documentation
  • integrate better with logging: capturing now by default captures test functions and their immediate setup/teardown in a single stream
  • capsys and capfd funcargs now have a readouterr() and a close() method (underlyingly objects are used which grew a readouterr() method as well to return snapshots of captured out/err)
  • make assert-reinterpretation work better with comparisons not returning bools (reported with numpy from thanks maciej fijalkowski)
  • reworked per-test output capturing into the plugin and thus removed capturing code from config object
  • item.repr_failure(excinfo) instead of item.repr_failure(excinfo, outerr)

1.0.0b8 (2009-07-22)

  • pytest_unittest-plugin is now enabled by default
  • introduced pytest_keyboardinterrupt hook and refined pytest_sessionfinish hooked, added tests.
  • workaround a buggy logging module interaction (“closing already closed files”). Thanks to Sridhar Ratnakumar for triggering.
  • if plugins use “py.test.importorskip” for importing a dependency only a warning will be issued instead of exiting the testing process.
  • many improvements to docs: - refined funcargs doc , use the term “factory” instead of “provider” - added a new talk/tutorial doc page - better download page - better plugin docstrings - added new plugins page and automatic doc generation script
  • fixed teardown problem related to partially failing funcarg setups (thanks MrTopf for reporting), “pytest_runtest_teardown” is now always invoked even if the “pytest_runtest_setup” failed.
  • tweaked doctest output for docstrings in py modules, thanks Radomir.


  • renamed py.test.xfail back to py.test.mark.xfail to avoid two ways to decorate for xfail
  • re-added py.test.mark decorator for setting keywords on functions (it was actually documented so removing it was not nice)
  • remove scope-argument from request.addfinalizer() because request.cached_setup has the scope arg. TOOWTDI.
  • perform setup finalization before reporting failures
  • apply modified patches from Andreas Kloeckner to allow test functions to have no func_code (#22) and to make “-k” and function keywords work (#20)
  • apply patch from Daniel Peolzleithner (issue #23)
  • resolve issue #18, multiprocessing.Manager() and redirection clash
  • make __name__ == “__channelexec__” for remote_exec code

1.0.0b3 (2009-06-19)

  • plugin classes are removed: one now defines hooks directly in or global pytest_*.py files.
  • added new pytest_namespace(config) hook that allows to inject helpers directly to the py.test.* namespace.
  • documented and refined many hooks
  • added new style of generative tests via pytest_generate_tests hook that integrates well with function arguments.


  • introduced new “funcarg” setup method, see doc/test/funcarg.txt
  • introduced plugin architecture and many new py.test plugins, see doc/test/plugins.txt
  • teardown_method is now guaranteed to get called after a test method has run.
  • new method: py.test.importorskip(mod,minversion) will either import or call py.test.skip()
  • completely revised internal py.test architecture
  • new py.process.ForkedFunc object allowing to fork execution of a function to a sub process and getting a result back.

XXX lots of things missing here XXX


  • refined installation and metadata, created new, now based on setuptools/ez_setup (thanks to Ralf Schmitt for his support).
  • improved the way of making py.* scripts available in windows environments, they are now added to the Scripts directory as “.cmd” files.
  • py.path.svnwc.status() now is more complete and uses xml output from the ‘svn’ command if available (Guido Wesdorp)
  • fix for py.path.svn* to work with svn 1.5 (Chris Lamb)
  • fix path.relto(otherpath) method on windows to use normcase for checking if a path is relative.
  • py.test’s traceback is better parseable from editors (follows the filenames:LINENO: MSG convention) (thanks to Osmo Salomaa)
  • fix to javascript-generation, “py.test –runbrowser” should work more reliably now
  • removed previously accidentally added py.test.broken and py.test.notimplemented helpers.
  • there now is a py.__version__ attribute


This is a fairly complete list of v0.9.1, which can serve as a reference for developers.

  • allowing + signs in py.path.svn urls [39106]
  • fixed support for Failed exceptions without excinfo in py.test [39340]
  • added support for killing processes for Windows (as well as platforms that support os.kill) in py.misc.killproc [39655]
  • added setup/teardown for generative tests to py.test [40702]
  • added detection of FAILED TO LOAD MODULE to py.test [40703, 40738, 40739]
  • fixed problem with calling .remove() on wcpaths of non-versioned files in py.path [44248]
  • fixed some import and inheritance issues in py.test [41480, 44648, 44655]
  • fail to run greenlet tests when pypy is available, but without stackless [45294]
  • small fixes in rsession tests [45295]
  • fixed issue with 2.5 type representations in py.test [45483, 45484]
  • made that internal reporting issues displaying is done atomically in py.test [45518]
  • made that non-existing files are ignored by the py.lookup script [45519]
  • improved exception name creation in py.test [45535]
  • made that less threads are used in execnet [merge in 45539]
  • removed lock required for atomic reporting issue displaying in py.test [45545]
  • removed globals from execnet [45541, 45547]
  • refactored cleanup mechanics, made that setDaemon is set to 1 to make atexit get called in 2.5 (py.execnet) [45548]
  • fixed bug in joining threads in py.execnet’s servemain [45549]
  • refactored py.test.rsession tests to not rely on exact output format anymore [45646]
  • using repr() on test outcome [45647]
  • added ‘Reason’ classes for py.test.skip() [45648, 45649]
  • killed some unnecessary sanity check in py.test.collect [45655]
  • avoid using os.tmpfile() in because on Windows it’s only usable by Administrators [45901]
  • added support for locking and non-recursive commits to py.path.svnwc [45994]
  • locking files in py.execnet to prevent CPython from segfaulting [46010]
  • added export() method to py.path.svnurl
  • fixed -d -x in py.test [47277]
  • fixed argument concatenation problem in py.path.svnwc [49423]
  • restore py.test behaviour that it exits with code 1 when there are failures [49974]
  • don’t fail on html files that don’t have an accompanying .txt file [50606]
  • fixed ‘ < input’ [50645]
  • small fix for code indentation in py.code.source [50755]
  • fix documentation building [51285]
  • improved checks for source representation of code blocks in py.test [51292]
  • added support for passing authentication to py.path.svn* objects [52000, 52001]
  • removed sorted() call for py.apigen tests in favour of [].sort() to support Python 2.3 [52481]