📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)

Mutation testing for JavaScript and friends

PHP Mutation Testing library

Mutation testing for Ruby. AI writes your code. AI writes your tests. But who tests the tests?

Mutation testing for .NET core and .NET framework!

State of the art mutation testing system for the JVM

Mutation testing system

Humbug is a Mutation Testing framework for PHP to measure the real effectiveness of your test suites and assist in their improvement. It eats Code Coverage for breakfast.

:zombie: Inject bugs and see if your tests catch them!

Practical mutation testing and fault injection for C and C++

Breaking your Rust code for fun and profit

Mutation testing for Python

🔎 Automated mutation testing for Swift 🕳️

Mutation testing resources: how to make better code by introducing bugs

MutPy is a mutation testing tool for Python 3.x source code

A mutation testing tool for Go.

Open Source, Language Agnostic Mutation Testing

🧬 Go Mutation Testing

Gradle plugin for PIT Mutation Testing

Mutation testing for Go source code. Fork from https://github.com/zimmski/go-mutesting

Mutation Testing for Ethereum Smart Contracts

Mutation testing for Scala

pg-index-health is an embeddable schema linter for PostgreSQL that detects common anti-patterns and promotes best practices.

C++ Mutation Test Environment

Regexp based tool for mutating generic source code across numerous languages

🔋amp-devcontainer is a batteries-included devcontainer useable for modern software development

Descartes supports developers to improve their test suites by reporting weak spots in covered code

Suite of C/C++ tooling built on LLVM/Clang

Python mutation testing: test your tests! Safely run mutation trials without source code modifications and see what will get past your test suite.

refine properties for testing Haskell programs