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Dev tools · March 19, 2026

mutflow

Mutation Testing inside test-suite. Compile once, catch gaps

What it does

mutflow is a mutation testing tool for Kotlin, implemented as a K2 compiler plugin. It injects all mutations at compile time and activates them one-by-one during your normal test run. Compile once, get results fast. It integrates with JUnit and Gradle with minimal setup. You could test it yourself within 5 minutes. Built for teams that want mutation testing without the overhead.

Does the same job

all alternatives →
  • ML
    Mutahunter – LLMs to support mutating testing for all major languages2024 · github.com · ▲31

    Background: We were inspired by how aider.chat was making use of pageranked AST and realized that we can use this to power high quality mutation testing using LLMs. Check it out!

  • KA
  • IB
    I built a tool to get instant test results2022 · github.com · ▲96

    I got sick of the old software development loop: Change code -> Run tests -> wait -> wait some more -> look at failures. I decided to build a tool that will enable you to: Change code -> look at failures. No wait time, no explicit test running. Under the hood: - Runs the whole test suite and collects code coverage per test. - For each auto file save, analyzes the changes on the tests. - Runs changed tests in the background. - Display results, the loop time from change to test results is approx 250ms. Instead of: code -> alt+tab -> arrow up -> rerun all the tests -> wait ... -> test results…

  • J1
  • FA
  • HW
    How we use LLMs to find testing gaps, vulnerabilities in codebases2024 · github.com · ▲9

    Hello everyone! I’m thrilled to announce the latest feature from Mutahunter.ai, the ultimate tool for finding and fixing weaknesses in your code. We’ve designed Mutahunter to leverage mutation testing powered by advanced LLMs, helping you uncover vulnerabilities and enhance your code quality effortlessly. Introducing our newest feature: Detailed Mutation Testing Reports! After running our mutation tests, Mutahunter now generates comprehensive reports that clearly summarize: • Vulnerable code gaps • Test case gaps These reports significantly reduce the cognitive load on developers by…

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