8.3.3

pytest 8.3.3 (2024-09-09)

Bug fixes

• #12446: Avoid calling @property (and other instance descriptors) during fixture discovery -- by asottile{.interpreted-text role="user"}

• #12659: Fixed the issue of not displaying assertion failure differences when using the parameter --import-mode=importlib in pytest>=8.1.

• #12667: Fixed a regression where type change in [ExceptionInfo.errisinstance]{.title-ref} caused [mypy]{.title-ref} to fail.

• #12744: Fixed typing compatibility with Python 3.9 or less -- replaced [typing.Self]{.title-ref} with [typing_extensions.Self]{.title-ref} -- by Avasam{.interpreted-text role="user"}

• #12745: Fixed an issue with backslashes being incorrectly converted in nodeid paths on Windows, ensuring consistent path handling across environments.

• #6682: Fixed bug where the verbosity levels where not being respected when printing the "msg" part of failed assertion (as in assert condition, msg).

• #9422: Fix bug where disabling the terminal plugin via -p no:terminal would cause crashes related to missing the verbose option.

  -- by GTowers1{.interpreted-text role="user"}

Improved documentation

• #12663: Clarify that the [pytest_deselected]{.title-ref} hook should be called from [pytest_collection_modifyitems]{.title-ref} hook implementations when items are deselected.
• #12678: Remove erroneous quotes from [tmp_path_retention_policy]{.title-ref} example in docs.

Miscellaneous internal changes

• #12769: Fix typos discovered by codespell and add codespell to pre-commit hooks.

8.3.2

pytest 8.3.2 (2024-07-24)

Bug fixes

• #12652: Resolve regression [conda]{.title-ref} environments where no longer being automatically detected.

  -- by RonnyPfannschmidt{.interpreted-text role="user"}

8.3.1

pytest 8.3.1 (2024-07-20)

The 8.3.0 release failed to include the change notes and docs for the release. This patch release remedies this. There are no other changes.

8.3.0

pytest 8.3.0 (2024-07-20)

New features

• #12231: Added [--xfail-tb]{.title-ref} flag, which turns on traceback output for XFAIL results.

  • If the [--xfail-tb]{.title-ref} flag is not given, tracebacks for XFAIL results are NOT shown.
  • The style of traceback for XFAIL is set with [--tb]{.title-ref}, and can be [auto|long|short|line|native|no]{.title-ref}.
  • Note: Even if you have [--xfail-tb]{.title-ref} set, you won't see them if [--tb=no]{.title-ref}.

  Some history:

  With pytest 8.0, [-rx]{.title-ref} or [-ra]{.title-ref} would not only turn on summary reports for xfail, but also report the tracebacks for xfail results. This caused issues with some projects that utilize xfail, but don't want to see all of the xfail tracebacks.

  This change detaches xfail tracebacks from [-rx]{.title-ref}, and now we turn on xfail tracebacks with [--xfail-tb]{.title-ref}. With this, the default [-rx]{.title-ref}/ [-ra]{.title-ref} behavior is identical to pre-8.0 with respect to xfail tracebacks. While this is a behavior change, it brings default behavior back to pre-8.0.0 behavior, which ultimately was considered the better course of action.

• #12281: Added support for keyword matching in marker expressions.

  Now tests can be selected by marker keyword arguments.
  Supported values are int{.interpreted-text role="class"}, (unescaped) str{.interpreted-text role="class"}, bool{.interpreted-text role="class"} & None{.interpreted-text role="data"}.

  See marker examples <marker_keyword_expression_example>{.interpreted-text role="ref"} for more information.

  -- by lovetheguitar{.interpreted-text role="user"}

• #12567: Added --no-fold-skipped command line option.

  If this option is set, then skipped tests in short summary are no longer grouped
  by reason but all tests are printed individually with their nodeid in the same
  way as other statuses.

  -- by pbrezina{.interpreted-text role="user"}

Improvements in existing functionality

• #12469: The console output now uses the "third-party plugins" terminology,
  replacing the previously established but confusing and outdated
  reference to setuptools <setuptools:index>{.interpreted-text role="std:doc"}
  -- by webknjaz{.interpreted-text role="user"}.

• #12544, #12545: Python virtual environment detection was improved by
  checking for a pyvenv.cfg{.interpreted-text role="file"} file, ensuring reliable detection on
  various platforms -- by zachsnickers{.interpreted-text role="user"}.

• #2871: Do not truncate arguments to functions in output when running with [-vvv]{.title-ref}.

• #389: The readability of assertion introspection of bound methods has been enhanced
  -- by farbodahm{.interpreted-text role="user"}, webknjaz{.interpreted-text role="user"}, obestwalter{.interpreted-text role="user"}, flub{.interpreted-text role="user"}
  and glyphack{.interpreted-text role="user"}.

  Earlier, it was like:

  =================================== FAILURES ===================================
  _____________________________________ test _____________________________________
  
      def test():
  >       assert Help().fun() == 2
  E       assert 1 == 2
  E        +  where 1 = <bound method Help.fun of <example.Help instance at 0x256a830>>()
  E        +    where <bound method Help.fun of <example.Help instance at 0x256a830>> = <example.Help instance at 0x256a830>.fun
  E        +      where <example.Help instance at 0x256a830> = Help()
  
  example.py:7: AssertionError
  =========================== 1 failed in 0.03 seconds ===========================

  And now it's like:

  =================================== FAILURES ===================================
  _____________________________________ test _____________________________________
  
      def test():
  >       assert Help().fun() == 2
  E       assert 1 == 2
  E        +  where 1 = fun()
  E        +    where fun = <test_local.Help object at 0x1074be230>.fun
  E        +      where <test_local.Help object at 0x1074be230> = Help()
  
  test_local.py:13: AssertionError
  =========================== 1 failed in 0.03 seconds ===========================

• #7662: Added timezone information to the testsuite timestamp in the JUnit XML report.

Bug fixes

• #11706: Fixed reporting of teardown errors in higher-scoped fixtures when using [--maxfail]{.title-ref} or [--stepwise]{.title-ref}.

  Originally added in pytest 8.0.0, but reverted in 8.0.2 due to a regression in pytest-xdist.
  This regression was fixed in pytest-xdist 3.6.1.

• #11797: pytest.approx{.interpreted-text role="func"} now correctly handles Sequence <collections.abc.Sequence>{.interpreted-text role="class"}-like objects.

• #12204, #12264: Fixed a regression in pytest 8.0 where tracebacks get longer and longer when multiple
  tests fail due to a shared higher-scope fixture which raised -- by bluetech{.interpreted-text role="user"}.

  Also fixed a similar regression in pytest 5.4 for collectors which raise during setup.

  The fix necessitated internal changes which may affect some plugins:

  • FixtureDef.cached_result[2] is now a tuple (exc, tb)
    instead of exc.
  • SetupState.stack failures are now a tuple (exc, tb)
    instead of exc.

• #12275: Fixed collection error upon encountering an abstract <abc>{.interpreted-text role="mod"} class, including abstract [unittest.TestCase]{.title-ref} subclasses.

• #12328: Fixed a regression in pytest 8.0.0 where package-scoped parameterized items were not correctly reordered to minimize setups/teardowns in some cases.

• #12424: Fixed crash with [assert testcase is not None]{.title-ref} assertion failure when re-running unittest tests using plugins like pytest-rerunfailures. Regressed in 8.2.2.

• #12472: Fixed a crash when returning category "error" or "failed" with a custom test status from pytest_report_teststatus{.interpreted-text role="hook"} hook -- pbrezina{.interpreted-text role="user"}.

• #12505: Improved handling of invalid regex patterns in pytest.raises(match=r'...') <pytest.raises>{.interpreted-text role="func"} by providing a clear error message.

• #12580: Fixed a crash when using the cache class on Windows and the cache directory was created concurrently.

• #6962: Parametrization parameters are now compared using [==]{.title-ref} instead of [is]{.title-ref} ([is]{.title-ref} is still used as a fallback if the parameter does not support [==]{.title-ref}).
  This fixes use of parameters such as lists, which have a different [id]{.title-ref} but compare equal, causing fixtures to be re-computed instead of being cached.

• #7166: Fixed progress percentages (the [ 87%] at the edge of the screen) sometimes not aligning correctly when running with pytest-xdist -n.

Improved documentation

• #12153: Documented using PYTEST_VERSION{.interpreted-text role="envvar"} to detect if code is running from within a pytest run.

• #12469: The external plugin mentions in the documentation now avoid mentioning
  setuptools entry-points <setuptools:index>{.interpreted-text role="std:doc"} as the concept is
  much more generic nowadays. Instead, the terminology of "external",
  "installed", or "third-party" plugins (or packages) replaces that.

  -- by webknjaz{.interpreted-text role="user"}

• #12577: [CI]{.title-ref} and [BUILD_NUMBER]{.title-ref} environment variables role is discribed in
  the reference doc. They now also appear when doing [pytest -h]{.title-ref}
  -- by MarcBresson{.interpreted-text role="user"}.

Contributor-facing changes

• #12467: Migrated all internal type-annotations to the python3.10+ style by using the [annotations]{.title-ref} future import.

  -- by RonnyPfannschmidt{.interpreted-text role="user"}

• #11771, #12557: The PyPy runtime version has been updated to 3.9 from 3.8 that introduced
  a flaky bug at the garbage collector which was not expected to fix there
  as the 3.8 is EoL.

  -- by x612skm{.interpreted-text role="user"}

• #12493: The change log draft preview integration has been refactored to use a
  thi...

8.2.2

pytest 8.2.2 (2024-06-04)

Bug Fixes

• #12355: Fix possible catastrophic performance slowdown on a certain parametrization pattern involving many higher-scoped parameters.
• #12367: Fix a regression in pytest 8.2.0 where unittest class instances (a fresh one is created for each test) were not released promptly on test teardown but only on session teardown.
• #12381: Fix possible "Directory not empty" crashes arising from concurent cache dir (.pytest_cache) creation. Regressed in pytest 8.2.0.

Improved Documentation

• #12290: Updated Sphinx theme to use Furo instead of Flask, enabling Dark mode theme.
• #12356: Added a subsection to the documentation for debugging flaky tests to mention
  lack of thread safety in pytest as a possible source of flakyness.
• #12363: The documentation webpages now links to a canonical version to reduce outdated documentation in search engine results.

8.2.1

pytest 8.2.1 (2024-05-19)

Improvements

• #12334: Support for Python 3.13 (beta1 at the time of writing).

Bug Fixes

• #12120: Fix [PermissionError]{.title-ref} crashes arising from directories which are not selected on the command-line.
• #12191: Keyboard interrupts and system exits are now properly handled during the test collection.
• #12300: Fixed handling of 'Function not implemented' error under squashfuse_ll, which is a different way to say that the mountpoint is read-only.
• #12308: Fix a regression in pytest 8.2.0 where the permissions of automatically-created .pytest_cache directories became rwx------ instead of the expected rwxr-xr-x.

Trivial/Internal Changes

• #12333: pytest releases are now attested using the recent Artifact Attestation support from GitHub, allowing users to verify the provenance of pytest's sdist and wheel artifacts.

8.2.0

pytest 8.2.0 (2024-04-27)

Deprecations

• #12069: A deprecation warning is now raised when implementations of one of the following hooks request a deprecated py.path.local parameter instead of the pathlib.Path parameter which replaced it:

  • pytest_ignore_collect{.interpreted-text role="hook"} - the path parameter - use collection_path instead.
  • pytest_collect_file{.interpreted-text role="hook"} - the path parameter - use file_path instead.
  • pytest_pycollect_makemodule{.interpreted-text role="hook"} - the path parameter - use module_path instead.
  • pytest_report_header{.interpreted-text role="hook"} - the startdir parameter - use start_path instead.
  • pytest_report_collectionfinish{.interpreted-text role="hook"} - the startdir parameter - use start_path instead.

  The replacement parameters are available since pytest 7.0.0.
  The old parameters will be removed in pytest 9.0.0.

  See legacy-path-hooks-deprecated{.interpreted-text role="ref"} for more details.

Features

• #11871: Added support for reading command line arguments from a file using the prefix character @, like e.g.: pytest @tests.txt. The file must have one argument per line.

  See Read arguments from file <args-from-file>{.interpreted-text role="ref"} for details.

Improvements

• #11523: pytest.importorskip{.interpreted-text role="func"} will now issue a warning if the module could be found, but raised ImportError{.interpreted-text role="class"} instead of ModuleNotFoundError{.interpreted-text role="class"}.

  The warning can be suppressed by passing exc_type=ImportError to pytest.importorskip{.interpreted-text role="func"}.

  See import-or-skip-import-error{.interpreted-text role="ref"} for details.

• #11728: For unittest-based tests, exceptions during class cleanup (as raised by functions registered with TestCase.addClassCleanup <unittest.TestCase.addClassCleanup>{.interpreted-text role="meth"}) are now reported instead of silently failing.

• #11777: Text is no longer truncated in the short test summary info section when -vv is given.

• #12112: Improved namespace packages detection when consider_namespace_packages{.interpreted-text role="confval"} is enabled, covering more situations (like editable installs).

• #9502: Added PYTEST_VERSION{.interpreted-text role="envvar"} environment variable which is defined at the start of the pytest session and undefined afterwards. It contains the value of pytest.__version__, and among other things can be used to easily check if code is running from within a pytest run.

Bug Fixes

• #12065: Fixed a regression in pytest 8.0.0 where test classes containing setup_method and tests using @staticmethod or @classmethod would crash with AttributeError: 'NoneType' object has no attribute 'setup_method'.

  Now the request.instance <pytest.FixtureRequest.instance>{.interpreted-text role="attr"} attribute of tests using @staticmethod and @classmethod is no longer None, but a fresh instance of the class, like in non-static methods.
  Previously it was None, and all fixtures of such tests would share a single self.

• #12135: Fixed issue where fixtures adding their finalizer multiple times to fixtures they request would cause unreliable and non-intuitive teardown ordering in some instances.

• #12194: Fixed a bug with --importmode=importlib and --doctest-modules where child modules did not appear as attributes in parent modules.

• #1489: Fixed some instances where teardown of higher-scoped fixtures was not happening in the reverse order they were initialized in.

Trivial/Internal Changes

• #12069: pluggy>=1.5.0 is now required.
• #12167: cache <cache>{.interpreted-text role="ref"}: create supporting files (CACHEDIR.TAG, .gitignore, etc.) in a temporary directory to provide atomic semantics.

8.1.2

pytest 8.1.2 (2024-04-26)

Bug Fixes

• #12114: Fixed error in pytest.approx{.interpreted-text role="func"} when used with [numpy]{.title-ref} arrays and comparing with other types.

8.1.1

pytest 8.1.1 (2024-03-08)

::: {.note}
::: {.title}
Note
:::

This release is not a usual bug fix release -- it contains features and improvements, being a follow up
to 8.1.0, which has been yanked from PyPI.
:::

Features

• #11475: Added the new consider_namespace_packages{.interpreted-text role="confval"} configuration option, defaulting to False.

  If set to True, pytest will attempt to identify modules that are part of namespace packages when importing modules.

• #11653: Added the new verbosity_test_cases{.interpreted-text role="confval"} configuration option for fine-grained control of test execution verbosity.
  See Fine-grained verbosity <pytest.fine_grained_verbosity>{.interpreted-text role="ref"} for more details.

Improvements

• #10865: pytest.warns{.interpreted-text role="func"} now validates that warnings.warn{.interpreted-text role="func"} was called with a [str]{.title-ref} or a [Warning]{.title-ref}.
  Currently in Python it is possible to use other types, however this causes an exception when warnings.filterwarnings{.interpreted-text role="func"} is used to filter those warnings (see CPython #103577 for a discussion).
  While this can be considered a bug in CPython, we decided to put guards in pytest as the error message produced without this check in place is confusing.

• #11311: When using --override-ini for paths in invocations without a configuration file defined, the current working directory is used
  as the relative directory.

  Previoulsy this would raise an AssertionError{.interpreted-text role="class"}.

• #11475: --import-mode=importlib <import-mode-importlib>{.interpreted-text role="ref"} now tries to import modules using the standard import mechanism (but still without changing :pysys.path{.interpreted-text role="data"}), falling back to importing modules directly only if that fails.

  This means that installed packages will be imported under their canonical name if possible first, for example app.core.models, instead of having the module name always be derived from their path (for example .env310.lib.site_packages.app.core.models).

• #11801: Added the iter_parents() <_pytest.nodes.Node.iter_parents>{.interpreted-text role="func"} helper method on nodes.
  It is similar to listchain <_pytest.nodes.Node.listchain>{.interpreted-text role="func"}, but goes from bottom to top, and returns an iterator, not a list.

• #11850: Added support for sys.last_exc{.interpreted-text role="data"} for post-mortem debugging on Python>=3.12.

• #11962: In case no other suitable candidates for configuration file are found, a pyproject.toml (even without a [tool.pytest.ini_options] table) will be considered as the configuration file and define the rootdir.

• #11978: Add --log-file-mode option to the logging plugin, enabling appending to log-files. This option accepts either "w" or "a" and defaults to "w".

  Previously, the mode was hard-coded to be "w" which truncates the file before logging.

• #12047: When multiple finalizers of a fixture raise an exception, now all exceptions are reported as an exception group.
  Previously, only the first exception was reported.

Bug Fixes

• #11475: Fixed regression where --importmode=importlib would import non-test modules more than once.

• #11904: Fixed a regression in pytest 8.0.0 that would cause test collection to fail due to permission errors when using --pyargs.

  This change improves the collection tree for tests specified using --pyargs, see 12043{.interpreted-text role="pull"} for a comparison with pytest 8.0 and <8.

• #12011: Fixed a regression in 8.0.1 whereby setup_module xunit-style fixtures are not executed when --doctest-modules is passed.

• #12014: Fix the stacklevel used when warning about marks used on fixtures.

• #12039: Fixed a regression in 8.0.2 where tests created using tmp_path{.interpreted-text role="fixture"} have been collected multiple times in CI under Windows.

Improved Documentation

• #11790: Documented the retention of temporary directories created using the tmp_path fixture in more detail.

Trivial/Internal Changes

• #11785: Some changes were made to private functions which may affect plugins which access them:

  • FixtureManager._getautousenames() now takes a Node itself instead of the nodeid.
  • FixtureManager.getfixturedefs() now takes the Node itself instead of the nodeid.
  • The _pytest.nodes.iterparentnodeids() function is removed without replacement.
    Prefer to traverse the node hierarchy itself instead.
    If you really need to, copy the function from the previous pytest release.

• #12069: Delayed the deprecation of the following features to 9.0.0:

  • node-ctor-fspath-deprecation{.interpreted-text role="ref"}.
  • legacy-path-hooks-deprecated{.interpreted-text role="ref"}.

  It was discovered after 8.1.0 was released that the warnings about the impeding removal were not being displayed, so the team decided to revert the removal.

  This is the reason for 8.1.0 being yanked.

pytest 8.1.0 (YANKED)

::: {.note}
::: {.title}
Note
:::

This release has been yanked: it broke some plugins without the proper warning period, due to
some warnings not showing up as expected.

See #12069.
:::

8.1.0

pytest 8.1.0 (YANKED)

Important

This release has been yanked: it broke some plugins without the proper warning period, due to some warnings not showing up as expected. See #12069.

Features

• #11475: Added the new consider_namespace_packages{.interpreted-text role="confval"} configuration option, defaulting to False.

  If set to True, pytest will attempt to identify modules that are part of namespace packages when importing modules.

• #11653: Added the new verbosity_test_cases{.interpreted-text role="confval"} configuration option for fine-grained control of test execution verbosity.
  See Fine-grained verbosity <pytest.fine_grained_verbosity>{.interpreted-text role="ref"} for more details.

Improvements

• #10865: pytest.warns{.interpreted-text role="func"} now validates that warnings.warn{.interpreted-text role="func"} was called with a [str]{.title-ref} or a [Warning]{.title-ref}.
  Currently in Python it is possible to use other types, however this causes an exception when warnings.filterwarnings{.interpreted-text role="func"} is used to filter those warnings (see CPython #103577 for a discussion).
  While this can be considered a bug in CPython, we decided to put guards in pytest as the error message produced without this check in place is confusing.

• #11311: When using --override-ini for paths in invocations without a configuration file defined, the current working directory is used
  as the relative directory.

  Previoulsy this would raise an AssertionError{.interpreted-text role="class"}.

• #11475: --import-mode=importlib <import-mode-importlib>{.interpreted-text role="ref"} now tries to import modules using the standard import mechanism (but still without changing :pysys.path{.interpreted-text role="data"}), falling back to importing modules directly only if that fails.

  This means that installed packages will be imported under their canonical name if possible first, for example app.core.models, instead of having the module name always be derived from their path (for example .env310.lib.site_packages.app.core.models).

• #11801: Added the iter_parents() <_pytest.nodes.Node.iter_parents>{.interpreted-text role="func"} helper method on nodes.
  It is similar to listchain <_pytest.nodes.Node.listchain>{.interpreted-text role="func"}, but goes from bottom to top, and returns an iterator, not a list.

• #11850: Added support for sys.last_exc{.interpreted-text role="data"} for post-mortem debugging on Python>=3.12.

• #11962: In case no other suitable candidates for configuration file are found, a pyproject.toml (even without a [tool.pytest.ini_options] table) will be considered as the configuration file and define the rootdir.

• #11978: Add --log-file-mode option to the logging plugin, enabling appending to log-files. This option accepts either "w" or "a" and defaults to "w".

  Previously, the mode was hard-coded to be "w" which truncates the file before logging.

• #12047: When multiple finalizers of a fixture raise an exception, now all exceptions are reported as an exception group.
  Previously, only the first exception was reported.

Bug Fixes

• #11904: Fixed a regression in pytest 8.0.0 that would cause test collection to fail due to permission errors when using --pyargs.

  This change improves the collection tree for tests specified using --pyargs, see 12043{.interpreted-text role="pull"} for a comparison with pytest 8.0 and <8.

• #12011: Fixed a regression in 8.0.1 whereby setup_module xunit-style fixtures are not executed when --doctest-modules is passed.

• #12014: Fix the stacklevel used when warning about marks used on fixtures.

• #12039: Fixed a regression in 8.0.2 where tests created using tmp_path{.interpreted-text role="fixture"} have been collected multiple times in CI under Windows.

Improved Documentation

• #11790: Documented the retention of temporary directories created using the tmp_path fixture in more detail.

Trivial/Internal Changes

• #11785: Some changes were made to private functions which may affect plugins which access them:
  • FixtureManager._getautousenames() now takes a Node itself instead of the nodeid.
  • FixtureManager.getfixturedefs() now takes the Node itself instead of the nodeid.
  • The _pytest.nodes.iterparentnodeids() function is removed without replacement.
    Prefer to traverse the node hierarchy itself instead.
    If you really need to, copy the function from the previous pytest release.