pytest-rerunfailures
pytest plugin to re-run tests to eliminate flaky failures
Decision gist · record as of 2026-08-14
Yes. This is a stable, actively maintained plugin (last release 2026-08-13) with low install friction, no security vulnerabilities, and a clear use case for any project dealing with flaky tests. The MPL-2.0 license is permissive for unmodified use. Install it if your test suite has intermittent failures you want to suppress without rewriting tests.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10+ and pytest 8.2 or newer.
- Hard crash recovery requires pytest-xdist 2.3.0 or newer and the -n flag.
- Low install friction with a pure-Python wheel.
License · maintenance · safety
MPL-2.0 (copyleft) — Licensed under MPL-2.0 (copyleft). You must disclose source modifications and distribute under the same license if you modify and redistribute the package; using it unmodified as a dependency carries minimal obligation.
last release 2026-08-13 (1 days) · last repo commit 2026-08-13 · 470 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 79,126,164 downloads/mo, #429 on PyPI
Alternatives
Verify before relying
pip install pytest-rerunfailures
# Command line: rerun all failures up to 5 times
pytest --reruns 5
# Or mark individual tests
import pytest
@pytest.mark.flaky(reruns=5)
def test_example():
assert some_condition- Whether the plugin's hard crash recovery works reliably across different segfault scenarios beyond the stated LAN assumption.
- Performance impact when reruns are applied to large test suites with many flaky tests simultaneously.
What it is and what it does
pytest-rerunfailures is a pytest plugin that automatically reruns tests when they fail, helping eliminate intermittent failures without modifying test code. It works by intercepting test failures and re-executing them up to a specified number of times, optionally with delays between attempts. The plugin can be configured globally via command-line flags like --reruns, --reruns-delay, and --reruns-delay-backoff-factor, or on a per-test basis using the @pytest.mark.flaky decorator.
The plugin supports fine-grained control over which failures to rerun: you can filter by exception type using --only-rerun and --rerun-except flags, apply exponential backoff to delays, and even force a global rerun count across all tests. When pytest-xdist is installed and tests run with the -n flag, the plugin can recover from hard crashes like segfaults. It also integrates with pytest's fixture and setup_class lifecycle, rerunning those when they fail.
Use it for
- Reduce test flakiness in CI/CD pipelines by automatically retrying transient network or timing failures without manual intervention.
- Mark specific tests as flaky with @pytest.mark.flaky(reruns=N) to handle known intermittent failures in isolation.
- Apply exponential backoff between retries to avoid overwhelming resources when tests fail due to temporary resource contention.
- Filter reruns by exception type to retry only specific failure modes while failing fast on deterministic errors.
- Cap total reruns across a suite with --max-suite-reruns to bound resource usage in large test suites with many flaky tests.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
This is a stable, actively maintained plugin (last release 2026-08-13) with low install friction, no security vulnerabilities, and a clear use case for any project dealing with flaky tests. The MPL-2.0 license is permissive for unmodified use. Install it if your test suite has intermittent failures you want to suppress without rewriting tests.
Install
pytest-rerunfailures on PyPI
Before you install
Low install friction with a pure-Python wheel. Actively maintained as of 2026-08-13 with 470 repository stars. Requires Python 3.10+ and pytest 8.2 or newer; no known vulnerabilities.
Requires Python 3.10+ and pytest 8.2 or newer. Hard crash recovery requires pytest-xdist 2.3.0 or newer and the -n flag.
License in practice
Licensed under MPL-2.0 (copyleft). You must disclose source modifications and distribute under the same license if you modify and redistribute the package; using it unmodified as a dependency carries minimal obligation.
Quickstart
pip install pytest-rerunfailures
# Command line: rerun all failures up to 5 times
pytest --reruns 5
# Or mark individual tests
import pytest
@pytest.mark.flaky(reruns=5)
def test_example():
assert some_conditionVerify before relying
- Whether the plugin's hard crash recovery works reliably across different segfault scenarios beyond the stated LAN assumption.
- Performance impact when reruns are applied to large test suites with many flaky tests simultaneously.
Package facts
| License | MPL-2.0 copyleft |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagespackagingpytest |
| Maintenance | Actively maintained 1 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 79,126,164 / month, #429 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/StableFramework :: PytestIntended Audience :: DevelopersOperating System :: MacOS :: MacOS XOperating System :: Microsoft :: WindowsOperating System :: POSIXProgramming Language :: Python :: 3 :: OnlyProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Python :: Implementation :: PyPyTopic :: Software Development :: Quality AssuranceTopic :: Software Development :: TestingTopic :: Utilities |
Evidence: pytest_rerunfailures-16.5-py3-none-any.whl
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See also flaky · pytest-cache · pytest-retry · pytest-sentry · pytest-mergify · pytest-forked · pytest-repeat · pytest-check · robotframework-retryfailed · pytest-watch