Sourced from pytest's releases.

9.1.0

pytest 9.1.0 (2026-06-13)

Removals and backward incompatible breaking changes

• #14533: When using --doctest-modules, autouse fixtures with module, package or session scope that are defined inline in Python test modules (not plugins or conftests) will now possibly execute twice.

  If this is undesirable, move the fixture definition to a conftest.py file if possible.

  Technical explanation for those interested: When using --doctest-modules, pytest possibly collects Python modules twice, once as pytest.Module and once as a DoctestModule (depending on the configuration). Due to improvements in pytest's fixture implementation, if e.g. the DoctestModule collects a fixture, it is now visible to it only, and not to the Module. This means that both need to register the fixtures independently.

Deprecations (removal in next major release)

• #10819: Added a deprecation warning for class-scoped fixtures defined as instance methods (without @classmethod). Such fixtures set attributes on a different instance than the test methods use, leading to unexpected behavior. Use @classmethod decorator instead -- by yastcher.

  See 10819 and 14011.

• #12882: Calling request.getfixturevalue() <pytest.FixtureRequest.getfixturevalue> during teardown to request a fixture that was not already requested is now deprecated and will become an error in pytest 10.

  See dynamic-fixture-request-during-teardown for details.

• #13409: Using non-~collections.abc.Collection iterables (such as generators, iterators, or custom iterable objects) for the argvalues parameter in @pytest.mark.parametrize <pytest.mark.parametrize ref> and metafunc.parametrize <pytest.Metafunc.parametrize> is now deprecated.

  These iterables get exhausted after the first iteration, leading to tests getting unexpectedly skipped in cases such as running pytest.main() multiple times, using class-level parametrize decorators, or collecting tests multiple times.

  See parametrize-iterators for details and suggestions.

• #13946: The private config.inicfg attribute is now deprecated. Use config.getini() <pytest.Config.getini> to access configuration values instead.

  See config-inicfg for more details.

• #14004: Passing baseid to ~pytest.FixtureDef or nodeid strings to fixture registration APIs is now deprecated. These are internal pytest APIs that are used by some plugins.

  Use the node parameter instead for fixture scoping. This enables more robust node-based matching instead of string prefix matching. If you've used nodeid=None, pass node=session instead.

  This will be removed in pytest 10.

• #14335: The method of configuring hooks using markers, deprecated since pytest 7.2, is now scheduled to be removed in pytest 10. See hook-markers for more details.

• #14434: The --pastebin option is now deprecated.

... (truncated)

• b2522cf Prepare release version 9.1.0
• 368d2fc [refactor] Tighten SetComparisonFunction to Iterator[str] (#14587)
• ff77cd8 [refactor] Make base assertion comparisons return an iterator instead of a li...
• 0d8491a build(deps): Bump actions/stale from 10.2.0 to 10.3.0
• 4a809d9 Merge pull request #14568 from pytest-dev/register-fixture
• 5dfa385 Fix recursion traceback test to cover all styles (#14582)
• f52ff0c Add pytest.register_fixture
• a8ac094 Merge pull request #14567 from pytest-dev/more-visibility-deprecate
• e5620cd [pre-commit.ci] pre-commit autoupdate (#14577)
• 2ce9c6d Merge pull request #14540 from minbang930/fix-14533-doctest-module-fixtures
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