---
title: "Stress-test Python test suites with mutation runs from mutmut"
description: "Use mutation testing to expose weak Python tests before merge or release by checking which code changes survive the current test suite."
verification: "listed"
source: "https://github.com/boxed/mutmut"
author: "boxed"
publisher_type: "organization"
category:
  - "Code Quality & Review"
framework:
  - "Multi-Framework"
tool_ecosystem:
  github_repo: "boxed/mutmut"
  github_stars: 1259
---

# 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

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

Install command or upstream instructions:

```
Install with `pip install mutmut`, configure the target paths if needed, then run `mutmut run` and inspect surviving mutants with `mutmut results`.
```

## Documentation

- https://mutmut.readthedocs.io/

## Source

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