8.4.0

pytest 8.4.0 (2025-06-02)

Removals and backward incompatible breaking changes

• #11372: Async tests will now fail, instead of warning+skipping, if you don't have any suitable plugin installed.

• #12346: Tests will now fail, instead of raising a warning, if they return any value other than None.

• #12874: We dropped support for Python 3.8 following its end of life (2024-10-07).

• #12960: Test functions containing a yield now cause an explicit error. They have not been run since pytest 4.0, and were previously marked as an expected failure and deprecation warning.

  See the docs <yield tests deprecated>{.interpreted-text role="ref"} for more information.

Deprecations (removal in next major release)

• #10839: Requesting an asynchronous fixture without a [pytest_fixture_setup]{.title-ref} hook that resolves it will now give a DeprecationWarning. This most commonly happens if a sync test requests an async fixture. This should have no effect on a majority of users with async tests or fixtures using async pytest plugins, but may affect non-standard hook setups or autouse=True. For guidance on how to work around this warning see sync-test-async-fixture{.interpreted-text role="ref"}.

New features

• #11538: Added pytest.RaisesGroup{.interpreted-text role="class"} as an equivalent to pytest.raises{.interpreted-text role="func"} for expecting ExceptionGroup{.interpreted-text role="exc"}. Also adds pytest.RaisesExc{.interpreted-text role="class"} which is now the logic behind pytest.raises{.interpreted-text role="func"} and used as parameter to pytest.RaisesGroup{.interpreted-text role="class"}. RaisesGroup includes the ability to specify multiple different expected exceptions, the structure of nested exception groups, and flags for emulating except* <except_star>{.interpreted-text role="ref"}. See assert-matching-exception-groups{.interpreted-text role="ref"} and docstrings for more information.

• #12081: Added capteesys{.interpreted-text role="fixture"} to capture AND pass output to next handler set by --capture=.

• #12504: pytest.mark.xfail{.interpreted-text role="func"} now accepts pytest.RaisesGroup{.interpreted-text role="class"} for the raises parameter when you expect an exception group. You can also pass a pytest.RaisesExc{.interpreted-text role="class"} if you e.g. want to make use of the check parameter.

• #12713: New [--force-short-summary]{.title-ref} option to force condensed summary output regardless of verbosity level.

  This lets users still see condensed summary output of failures for quick reference in log files from job outputs, being especially useful if non-condensed output is very verbose.

• #12749: pytest traditionally collects classes/functions in the test module namespace even if they are imported from another file.

  For example:

  # contents of src/domain.py
  class Testament: ...
  
  
  # contents of tests/test_testament.py
  from domain import Testament
  
  
  def test_testament(): ...

  In this scenario with the default options, pytest will collect the class [Testament]{.title-ref} from [tests/test_testament.py]{.title-ref} because it starts with [Test]{.title-ref}, even though in this case it is a production class being imported in the test module namespace.

  This behavior can now be prevented by setting the new collect_imported_tests{.interpreted-text role="confval"} configuration option to false, which will make pytest collect classes/functions from test files only if they are defined in that file.

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

• #12765: Thresholds to trigger snippet truncation can now be set with truncation_limit_lines{.interpreted-text role="confval"} and truncation_limit_chars{.interpreted-text role="confval"}.

  See truncation-params{.interpreted-text role="ref"} for more information.

• #13125: console_output_style{.interpreted-text role="confval"} now supports times to show execution time of each test.

• #13192: pytest.raises{.interpreted-text role="func"} will now raise a warning when passing an empty string to match, as this will match against any value. Use match="^$" if you want to check that an exception has no message.

• #13192: pytest.raises{.interpreted-text role="func"} will now print a helpful string diff if matching fails and the match parameter has ^ and $ and is otherwise escaped.

• #13192: You can now pass with pytest.raises(check=fn): <pytest.raises>{.interpreted-text role="func"}, where fn is a function which takes a raised exception and returns a boolean. The raises fails if no exception was raised (as usual), passes if an exception is raised and fn returns True (as well as match and the type matching, if specified, which are checked before), and propagates the exception if fn returns False (which likely also fails the test).

• #13228: hidden-param{.interpreted-text role="ref"} can now be used in id of pytest.param{.interpreted-text role="func"} or in
  ids of Metafunc.parametrize <pytest.Metafunc.parametrize>{.interpreted-text role="py:func"}.
  It hides the parameter set from the test name.

• #13253: New flag: --disable-plugin-autoload <disable_plugin_autoload>{.interpreted-text role="ref"} which works as an alternative to PYTEST_DISABLE_PLUGIN_AUTOLOAD{.interpreted-text role="envvar"} when setting environment variables is inconvenient; and allows setting it in config files with addopts{.interpreted-text role="confval"}.

Improvements in existing functionality

• #10224: pytest's short and long traceback styles (how-to-modifying-python-tb-printing{.interpreted-text role="ref"})
  now have partial 657{.interpreted-text role="pep"} support and will show specific code segments in the
  traceback.

  ================================= FAILURES =================================
  _______________________ test_gets_correct_tracebacks _______________________
  
  test_tracebacks.py:12: in test_gets_correct_tracebacks
      assert manhattan_distance(p1, p2) == 1
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  test_tracebacks.py:6: in manhattan_distance
      return abs(point_1.x - point_2.x) + abs(point_1.y - point_2.y)
                             ^^^^^^^^^
  E   AttributeError: 'NoneType' object has no attribute 'x'
  

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

• #11118: Now pythonpath{.interpreted-text role="confval"} configures [$PYTHONPATH]{.title-ref} earlier than before during the initialization process, which now also affects plugins loaded via the [-p]{.title-ref} command-line option.

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

• #11381: The type parameter of the parser.addini method now accepts ["int"]{.title-ref} and "float" parameters, facilitating the parsing of configuration values in the configuration file.

  Example:

  def pytest_addoption(parser):
      parser.addini("int_value", type="int", default=2, help="my int value")
      parser.addini("float_value", type="float", default=4.2, help="my float value")

  The [pytest.ini]{.title-ref} file:

  [pytest]
  int_value = 3
  float_value = 5.4

• #11525: Fixtures are now clearly represented in the output as a "fixture object", not as a normal function as before, making it easy for beginners to catch mistakes such as referencing a fixture declared in the same module but not requested in the test function.

  -- by the-compiler{.interpreted-text role="user"} and glyphack{.interpreted-text role="user"}

• #12426: A warning is now issued when pytest.mark.usefixtures ref{.interpreted-text role="ref"} is used without specifying any fixtures. Previously, empty usefixtures markers were silently ignored.

• #12707: Exception chains can be navigated when dropped into Pdb in Python 3.13+.

• #12736: Added a new attribute [name]{.title-ref} with the fixed value ["pytest tests"]{.title-ref} to the root tag [testsuites]{.title-ref} of the junit-xml generated by pytest.

  This attribute is part of many junit-xml specifications and is even part of the [junit-10.xsd]{.title-ref} specification that pytest's implementation is based on.

• #12943: If a test fails with an exceptiongroup with a single exception, the contained exception will now be displayed in the short test summary info.

• #12958: A number of unraisable <unraisable>{.interpreted-text role="ref"}...

8.3.5

pytest 8.3.5 (2025-03-02)

Bug fixes

• #11777: Fixed issue where sequences were still being shortened even with -vv verbosity.
• #12888: Fixed broken input when using Python 3.13+ and a libedit build of Python, such as on macOS or with uv-managed Python binaries from the python-build-standalone project. This could manifest e.g. by a broken prompt when using Pdb, or seeing empty inputs with manual usage of input() and suspended capturing.
• #13026: Fixed AttributeError{.interpreted-text role="class"} crash when using --import-mode=importlib when top-level directory same name as another module of the standard library.
• #13053: Fixed a regression in pytest 8.3.4 where, when using --import-mode=importlib, a directory containing py file with the same name would cause an ImportError
• #13083: Fixed issue where pytest could crash if one of the collected directories got removed during collection.

Improved documentation

• #12842: Added dedicated page about using types with pytest.

  See types{.interpreted-text role="ref"} for detailed usage.

Contributor-facing changes

• #13112: Fixed selftest failures in test_terminal.py with Pygments >= 2.19.0
• #13256: Support for Towncrier versions released in 2024 has been re-enabled
  when building Sphinx docs -- by webknjaz{.interpreted-text role="user"}.

8.3.4

pytest 8.3.4 (2024-12-01)

Bug fixes

• #12592: Fixed KeyError{.interpreted-text role="class"} crash when using --import-mode=importlib in a directory layout where a directory contains a child directory with the same name.

• #12818: Assertion rewriting now preserves the source ranges of the original instructions, making it play well with tools that deal with the AST, like executing.

• #12849: ANSI escape codes for colored output now handled correctly in pytest.fail{.interpreted-text role="func"} with [pytrace=False]{.title-ref}.

• #9353: pytest.approx{.interpreted-text role="func"} now uses strict equality when given booleans.

Improved documentation

• #10558: Fix ambiguous docstring of pytest.Config.getoption{.interpreted-text role="func"}.

• #10829: Improve documentation on the current handling of the --basetemp option and its lack of retention functionality (temporary directory location and retention{.interpreted-text role="ref"}).

• #12866: Improved cross-references concerning the recwarn{.interpreted-text role="fixture"} fixture.

• #12966: Clarify filterwarnings{.interpreted-text role="ref"} docs on filter precedence/order when using multiple @pytest.mark.filterwarnings <pytest.mark.filterwarnings ref>{.interpreted-text role="ref"} marks.

Contributor-facing changes

• #12497: Fixed two failing pdb-related tests on Python 3.13.

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.