flake8-pytest-style
A flake8 plugin checking common style issues or inconsistencies with pytest-based tests.
Decision gist · record as of 2026-08-14
Yes. If you use pytest and want automated style enforcement for test code, this plugin is worth installing. It has low install friction, active maintenance, no known vulnerabilities, and catches real mistakes that improve test reliability. The only caveat is that the license treatment is marked unclear in the metadata, though the description states MIT—verify the actual license before use in proprietary projects.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later; flake8 must be installed and configured in your project.
- Low friction installation with a single lightweight runtime dependency (flake8-plugin-utils).
- Actively maintained with recent releases; last commit 2026-08-13 and version 2.2.0 released 2025-10-20.
License · maintenance · safety
(unclear)
last release 2025-10-20 (298 days) · last repo commit 2026-08-13 · 240 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 201,433 downloads/mo, #9,672 on PyPI
Alternatives
Verify before relying
pip install flake8-pytest-style
# Then run flake8 on your test files:
flake8 tests/
# The plugin automatically checks for issues like:
# PT001: @pytest.fixture over @pytest.fixture()
# PT009: regular assert instead of unittest-style assertions- Whether the license is actually MIT (description says 'MIT' but meta.license_spdx is null)
What it is and what it does
flake8-pytest-style is a flake8 plugin that integrates directly into your linting workflow to catch style and consistency issues specific to pytest test code. It reports over 30 distinct error codes (PT001–PT031) covering common mistakes like using @pytest.fixture() with unnecessary parentheses, overly broad exception matching in pytest.raises(), unittest-style assertions instead of pytest idioms, and fixture naming/return-value inconsistencies.
The plugin works as a flake8 extension, running automatically when you invoke flake8 on your test files. It is configurable via flake8 settings for several rules (fixture parentheses style, parametrize argument types, exception/warning matching requirements) and requires only one runtime dependency. It supports Python 3.10 through 3.14 and is actively maintained.
Use it for
- Enforce consistent pytest fixture style across a team (e.g., @pytest.fixture vs @pytest.fixture()) via PT001/PT023.
- Catch overly broad exception handlers in pytest.raises() that could mask unrelated errors (PT011).
- Migrate from unittest-style assertions to pytest idioms automatically during code review (PT009/PT027).
- Detect fixture naming mistakes and return-value inconsistencies that indicate bugs (PT004/PT005).
- Validate parametrize decorators for correct argument types and duplicate test cases (PT006/PT007/PT014).
- Identify deprecated pytest patterns like @pytest.yield_fixture and request.addfinalizer (PT020/PT021).
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
If you use pytest and want automated style enforcement for test code, this plugin is worth installing. It has low install friction, active maintenance, no known vulnerabilities, and catches real mistakes that improve test reliability. The only caveat is that the license treatment is marked unclear in the metadata, though the description states MIT—verify the actual license before use in proprietary projects.
Install
flake8-pytest-style on PyPI
Before you install
Low friction installation with a single lightweight runtime dependency (flake8-plugin-utils). Actively maintained with recent releases; last commit 2026-08-13 and version 2.2.0 released 2025-10-20. Requires Python 3.10 or later.
Requires Python 3.10 or later; flake8 must be installed and configured in your project.
Quickstart
pip install flake8-pytest-style
# Then run flake8 on your test files:
flake8 tests/
# The plugin automatically checks for issues like:
# PT001: @pytest.fixture over @pytest.fixture()
# PT009: regular assert instead of unittest-style assertionsVerify before relying
- Whether the license is actually MIT (description says 'MIT' but meta.license_spdx is null)
Package facts
| License | Not declared unclear |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packageflake8-plugin-utils |
| Maintenance | Actively maintained 298 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 201,433 / month, #9,672 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableEnvironment :: ConsoleEnvironment :: PluginsFramework :: Flake8Framework :: PytestIntended Audience :: DevelopersOperating System :: OS IndependentProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Software Development :: Quality AssuranceTopic :: Software Development :: TestingTopic :: Software Development :: Testing :: Unit |
Evidence: flake8_pytest_style-2.2.0-py3-none-any.whl
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See also flake8-return · pytest-examples · pytest-raises · wemake-python-styleguide · pylint-pytest · flake8-pie · flake8-print · flake8-noqa · pytest-mock · flake8-plugin-utils