v8.4.2

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v8.4.1

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pytest 8.4.1 (2025年06月17日)

Bug fixes

• #​13461: Corrected _pytest.terminal.TerminalReporter.isatty to support
  being called as a method. Before it was just a boolean which could
  break correct code when using -o log_cli=true).

• #​13477: Reintroduced pytest.PytestReturnNotNoneWarning{.interpreted-text role="class"} which was removed by accident in pytest [8.4]{.title-ref}.

  This warning is raised when a test functions returns a value other than None, which is often a mistake made by beginners.

  See return-not-none{.interpreted-text role="ref"} for more information.

• #​13497: Fixed compatibility with Twisted 25+.

Improved documentation

• #​13492: Fixed outdated warning about faulthandler not working on Windows.

v8.4.0

Compare Source

pytest 8.4.0 (2025年06月02日)

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年10月07日).

• #​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"} enhancements:

  • Set the unraisable hook as early as possible and unset it as late as possible, to collect the most possible number of unraisable exceptions.
  • Call the garbage collector just before unsetting the unraisable hook, to collect any straggling exceptions.
  • Collect multiple unraisable exceptions per test phase.
  • Report the tracemalloc{.interpreted-text role="mod"} allocation traceback (if available).
  • Avoid using a generator based hook to allow handling StopIteration{.interpreted-text role="class"} in test failures.
  • Report the unraisable exception as the cause of the pytest.PytestUnraisableExceptionWarning{.interpreted-text role="class"} exception if raised.
  • Compute the repr of the unraisable object in the unraisable hook so you get the latest information if available, and should help with resurrection of the object.

• #​13010: pytest.approx{.interpreted-text role="func"} now can compare collections that contain numbers and non-numbers mixed.

• #​13016: A number of threadexception <unraisable>{.interpreted-text role="ref"} enhancements:

  • Set the excepthook as early as possible and unset it as late as possible, to collect the most possible number of unhandled exceptions from threads.
  • Collect multiple thread exceptions per test phase.
  • Report the tracemalloc{.interpreted-text role="mod"} allocation traceback (if available).
  • Avoid using a generator based hook to allow handling StopIteration{.interpreted-text role="class"} in test failures.
  • Report the thread exception as the cause of the pytest.PytestUnhandledThreadExceptionWarning{.interpreted-text role="class"} exception if raised.
  • Extract the name of the thread object in the excepthook which should help with resurrection of the thread.

• #​13031: An empty parameter set as in pytest.mark.parametrize([], ids=idfunc) will no longer trigger a call to idfunc with internal objects.

• #​13115: Allows supplying ExceptionGroup[Exception] and BaseExceptionGroup[BaseException] to pytest.raises to keep full typing on ExceptionInfo <pytest.ExceptionInfo>{.interpreted-text role="class"}:

  with pytest.raises(ExceptionGroup[Exception]) as exc_info:
   some_function()

  Parametrizing with other exception types remains an error - we do not check the types of child exceptions and thus do not permit code that might look like we do.

• #​13122: The --stepwise mode received a number of improvements:

  • It no longer forgets the last failed test in case pytest is executed later without the flag.

    This enables the following workflow:

    1. Execute pytest with --stepwise, pytest then stops at the first failing test;
    2. Iteratively update the code and run the test in isolation, without the --stepwise flag (for example in an IDE), until it is fixed.
    3. Execute pytest with --stepwise again and pytest will continue from the previously failed test, and if it passes, continue on to the next tests.

    Previously, at step 3, pytest would start from the beginning, forgetting the previously failed test.

    This change however might cause issues if the --stepwise mode is used far apart in time, as the state might get stale, so the internal state will be reset automatically in case the test suite changes (for now only the number of tests are considered for this, we might change/improve this on the future).

  • New --stepwise-reset/--sw-reset flag, allowing the user to explicitly reset the stepwise state and restart the workflow from the beginning.

• #​13308: Added official support for Python 3.14.

• #​13380: Fix ExceptionGroup{.interpreted-text role="class"} traceback filtering to exclude pytest internals.

• #​13415: The author metadata of the BibTex example is now correctly formatted with last names following first names.
  An example of BibLaTex has been added.
  BibTex and BibLaTex examples now clearly indicate that what is cited is software.

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

• #​13420: Improved test collection performance by optimizing path resolution used in FSCollector.

• #​13457: The error message about duplicate parametrization no longer displays an internal stack trace.

• #​4112: Using pytest.mark.usefixtures <pytest.mark.usefixtures ref>{.interpreted-text role="ref"} on pytest.param{.interpreted-text role="func"} now produces an error instead of silently doing nothing.

• #​5473: Replace [:]{.title-ref} with [;]{.title-ref} in the assertion rewrite warning message so it can be filtered using standard Python warning filters before calling pytest.main{.interpreted-text role="func"}.

[#​6985](https://redirect.github.com/pytest-dev/pytest/issues/6985): Improved `pytest.approx`{.interpreted-text role="func"} to enhance the readability of value ranges and tolerances between 0.001 and 1000.

: - The [repr]{.title-ref} method now provides clearer output for values within those ranges, making it easier to interpret the results.
 - Previously, the output for those ranges of values and tolerances was displayed in scientific notation (e.g., [42 ± 1.0e+00]{.title-ref}). The updated method now presents the tolerance as a decimal for better readability (e.g., [42 ± 1]{.title-ref}).
 Example:
 **Previous Output:**
 ``` console
 >>> pytest.approx(42, abs=1)
 42 ± 1.0e+00
 ```
 **Current Output:**
 ``` console
 >>> pytest.approx(42, abs=1)
 42 ± 1
 ```
 \-- by `fazeelghafoor`{.interpreted-text role="user"}

• #​7683: The formerly optional pygments dependency is now required, causing output always to be source-highlighted (unless disabled via the --code-highlight=no CLI option).

Bug fixes

• #​10404: Apply filterwarnings from config/cli as soon as possible, and revert them as late as possible
  so that warnings as errors are collected throughout the pytest run and before the
  unraisable and threadexcept hooks are removed.

  This allows very late warnings and unraisable/threadexcept exceptions to fail the test suite.

  This also changes the warning that the lsof plugin issues from PytestWarning to the new warning PytestFDWarning so it can be more easily filtered.

• #​11067: The test report is now consistent regardless if the test xfailed via pytest.mark.xfail <pytest.mark.xfail ref>{.interpreted-text role="ref"} or pytest.fail{.interpreted-text role="func"}.

  Previously, xfailed tests via the marker would have the string "reason: " prefixed to the message, while those xfailed via the function did not. The prefix has been removed.

• #​12008: In 11220{.interpreted-text role="pr"}, an unintended change in reordering was introduced by changing the way indices were assigned to direct params. More specifically, before that change, the indices of direct params to metafunc's callspecs were assigned after all parametrizations took place. Now, that change is reverted.

• #​12863: Fix applying markers, including pytest.mark.parametrize <pytest.mark.parametrize ref>{.interpreted-text role="ref"} when placed above [@​staticmethod]{.title-ref} or [@​classmethod]{.title-ref}.

• #​12929: Handle StopIteration from test cases, setup and teardown correctly.

• #​12938: Fixed --durations-min argument not respected if -vv is used.

• #​12946: Fixed missing help for pdb{.interpreted-text role="mod"} commands wrapped by pytest -- by adamchainz{.interpreted-text role="user"}.

• #​12981: Prevent exceptions in pytest.Config.add_cleanup{.interpreted-text role="func"} callbacks preventing further cleanups.

• #​13047: Restore pytest.approx{.interpreted-text role="func"} handling of equality checks between [bool]{.title-ref} and [numpy.bool_]{.title-ref} types.

  Comparing [bool]{.title-ref} and [numpy.bool_]{.title-ref} using pytest.approx{.interpreted-text role="func"} accidentally changed in version [8.3.4]{.title-ref} and [8.3.5]{.title-ref} to no longer match:

  >>> import numpy as np
  >>> from pytest import approx
  >>> [np.True_, np.True_] == pytest.approx([True, True])
  False

  This has now been fixed:

  >>> [np.True_, np.True_] == pytest.approx([True, True])
  True

• #​13119: Improved handling of invalid regex patterns for filter warnings by providing a clear error message.

• #​13175: The diff is now also highlighted correctly when comparing two strings.

• #​13248: Fixed an issue where passing a scope in Metafunc.parametrize <pytest.Metafunc.parametrize>{.interpreted-text role="py:func"} with indirect=True
  could result in other fixtures being unable to depend on the parametrized fixture.

• #​13291: Fixed repr of attrs objects in assertion failure messages when using attrs>=25.2.

• #​13312: Fixed a possible KeyError crash on PyPy during collection of tests involving higher-scoped parameters.

• #​13345: Fix type hints for pytest.TestReport.when{.interpreted-text role="attr"} and pytest.TestReport.location{.interpreted-text role="attr"}.

• #​13377: Fixed handling of test methods with positional-only parameter syntax.

  Now, methods are supported that formally define self as positional-only
  and/or fixture parameters as keyword-only, e.g.:

  class TestClass:
   def test_method(self, /, *, fixture): ...

  Before, this caused an internal error in pytest.

• #​13384: Fixed an issue where pytest could report negative durations.

• #​13420: Added lru_cache to nodes._check_initialpaths_for_relpath.

• #​9037: Honor disable_test_id_escaping_and_forfeit_all_rights_to_community_support{.interpreted-text role="confval"} when escaping ids in parametrized tests.

Improved documentation

• #​12535: [This
  example]{.title-ref}<https://docs.pytest.org/en/latest/example/simple.html#making-test-result-information-available-in-fixtures>
  showed print statements that do not exactly reflect what the
  different branches actually do. The fix makes the example more precise.

• #​13218: Pointed out in the pytest.approx{.interpreted-text role="func"} documentation that it considers booleans unequal to numeric zero or one.

• #​13221: Improved grouping of CLI options in the --help output.

• #​6649: Added ~pytest.TerminalReporter{.interpreted-text role="class"} to the api-reference{.interpreted-text role="ref"} documentation page.

• #​8612: Add a recipe for handling abstract test classes in the documentation.

  A new example has been added to the documentation to demonstrate how to use a mixin class to handle abstract
  test classes without manually setting the __test__ attribute for subclasses.
  This ensures that subclasses of abstract test classes are automatically collected by pytest.

Packaging updates and notes for downstreams

• #​13317: Specified minimum allowed versions of colorama, iniconfig,
  and packaging; and bumped the minimum allowed version
  of exceptiongroup for python_version<'3.11' from a release
  candidate to a full release.

Contributor-facing changes

• #​12017: Mixed internal improvements:

  • Migrate formatting to f-strings in some tests.
  • Use type-safe constructs in JUnitXML tests.
  • MovedMockTiming into _pytest.timing.

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

• #​12647: Fixed running the test suite with the hypothesis pytest plugin.

Miscellaneous internal changes

• #​6649: Added ~pytest.TerminalReporter{.interpreted-text role="class"} to the public pytest API, as it is part of the signature of the pytest_terminal_summary{.interpreted-text role="hook"} hook.

v8.3.5

Compare Source

pytest 8.3.5 (2025年03月02日)

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"}.

v8.3.4

Compare Source

pytest 8.3.4 (2024年12月01日)

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.

v8.3.3

Compare Source

pytest 8.3.3 (2024年09月09日)

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.

v8.3.2

Compare Source

pytest 8.3.2 (2024年07月24日)

Bug fixes

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

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

v8.3.1

Compare Source

pytest 8.3.1 (2024年07月20日)

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.

v8.3.0

Compare Source

pytest 8.3.0 (2024年07月20日)

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
  third party extension sphinxcontib-towncrier. The previous in-repo
  script was putting the change log preview file at
  doc/en/_changelog_towncrier_draft.rst{.interpreted-text role="file"}. Said file is no longer
  ignored in Git and might show up among untracked files in the
  development environments of the contributors. To address that, the
  contributors can run the following command that will clean it up:

  $ git clean -x -i -- doc/en/_changelog_towncrier_draft.rst

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

• #​12498: All the undocumented tox environments now have descriptions.
  They can be listed in one's development environment by invoking
  tox -av in a terminal.

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

• #​12501: The changelog configuration has been updated to introduce more accurate
  audience-tailored categories. Previously, there was a trivial
  change log fragment type with an unclear and broad meaning. It was
  removed and we now have contrib, misc and packaging in
  place of it.

  The new change note types target the readers who are downstream
  packagers and project contributors. Additionally, the miscellaneous
  section is kept for unspecified updates that do not fit anywhere else.

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

• #​12502: The UX of the GitHub automation making pull requests to update the
  plugin list has been updated. Previously, the maintainers had to close
  the automatically created pull requests and re-open them to trigger the
  CI runs. From now on, they only need to click the [Ready for review]{.title-ref}
  button instead.

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

• #​12522: The :pull: RST role has been replaced with a shorter
  :pr: due to starting to use the implementation from
  the third-party sphinx-issues{.interpreted-text role="pypi"} Sphinx extension
  -- by webknjaz{.interpreted-text role="user"}.

• #​12531: The coverage reporting configuration has been updated to exclude
  pytest's own tests marked as expected to fail from the coverage
  report. This has an effect of reducing the influence of flaky
  tests on the resulting number.

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

• #​12533: The extlinks Sphinx extension is no longer enabled. The :bpo:
  role it used to declare has been removed with that. BPO itself has
  migrated to GitHub some years ago and it is possible to link the
  respective issues by using their GitHub issue numbers and the
  :issue: role that the sphinx-issues extension implements.

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

• #​12562: Possible typos in using the :user: RST role is now being linted
  through the pre-commit tool integration -- by webknjaz{.interpreted-text role="user"}.

v8.2.2

Compare Source

pytest 8.2.2 (2024年06月04日)

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.

v8.2.1

Compare Source

pytest 8.2.1 (2024年05月19日)

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.

v8.2.0

Compare Source

pytest 8.2.0 (2024年04月27日)

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.

v8.1.2

Compare Source

pytest 8.1.2 (2024年04月26日)

Bug Fixes

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