# Stress-test Python test suites with mutation runs from mutmut

> Use mutation testing to expose weak Python tests before merge or release by checking which code changes survive the current test suite.

- Skill: `agentskillexchange/stress-test-python-test-suites-with-mutation-runs-from-mutmu` (Agent Skill)
- Install (CLI): `npx skillmds@latest add agentskillexchange/stress-test-python-test-suites-with-mutation-runs-from-mutmu`
- Raw SKILL.md: https://api.skillmd.com/api/skills/agentskillexchange/stress-test-python-test-suites-with-mutation-runs-from-mutmu/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: agentskillexchange (https://skillmd.com/u/agentskillexchange)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/agentskillexchange/stress-test-python-test-suites-with-mutation-runs-from-mutmu

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# Stress-test Python test suites with mutation runs from mutmut

Use mutation testing to expose weak Python tests before merge or release by checking which code changes survive the current test suite.

## Prerequisites

Python 3, pip, mutmut, pytest-compatible test suite

## Installation

Use the upstream install or setup path that matches your environment:
- pip install mutmut

Requirements and caveats from upstream:
- mutmut - python mutation tester
- Mutmut is a mutation testing system for Python, with a strong focus on ease
- this article <https://kodare.net/2016/12/01/mutmut-a-python-mutation-testing-system.html>_.

Basic usage or getting-started notes:
- ------------
- ---------------
- You can get started with a simple:

- Source: https://github.com/boxed/mutmut
- Extracted from upstream docs: https://raw.githubusercontent.com/boxed/mutmut/HEAD/README.rst

## Documentation

- https://mutmut.readthedocs.io/

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/stress-test-python-test-suites-with-mutation-runs-from-mutmut/)