Py-mutmut

Jul 20, 2023

Mutation testing for Python 3

Mutmut is a mutation testing system for Python, with a strong focus on ease of use. If you don’t know what mutation testing is try starting with this article.

Some highlight features

  • Found mutants can be applied on disk with a simple command making it very easy to work with the results
  • Remembers work that has been done, so you can work incrementally
  • Supports all test runners because mutmut only needs an exit code from the test command
  • Can use coverage data to only do mutation testing on covered lines
  • Battle tested on real libraries by multiple companies


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