Logo of Judy - Mutation Testing Tool for Java

Judy mutation testing tool for Java is available in three versions:

  • The latest version of Judy 2.1.0 mutation testing tool for Java is available to download from MUTATIONTESTING.ORG or here. Release note:
    What’s new in Judy 2.1.0
    • New collection based mutators modifying Java Collections Framework objects.
    • Support for second order mutation (SOM)
    • JUnit tests invocation based on code coverage mechanism.
    • More flexible output and logging properties.
    • Stability fixes
    • Bug fixes
  • Judy 2.0.0 mutation testing tool for Java is available to download from MUTATIONTESTING.ORG or here.
  • Judy 0.1 Judy 0.1 download

For more information  see

  • Panel discussion/tool demo presentation at Mutation’2013 conference – Judy mutation testing tool in a nutshell, i.e. 3 slides
  • Lech Madeyski, Wojciech Orzeszyna, Richard Torkar, Mariusz Józala, “Overcoming the Equivalent Mutant Problem: A Systematic Literature Review and a Comparative Experiment of Second Order Mutation”, IEEE Transactions on Software Engineering (the highest ranked, flagship software engineering journal, IF12=2.588 / 5-year IF12=3.371).

DOI: 10.1109/TSE.2013.44

Paper in PDF (preprint): link to the paper


Appendix in PDF: link to the paper

Systematic Literature Review (SLR) protocol in PDF:link to the paper

  • Lech Madeyski, Norbert Radyk, “Judy – A Mutation Testing Tool for Java”, IET Software, Volume 4, Issue 1, Pages 32 – 42. testowanie mutacyjne z użyciem testera mutacyjnego Judy dla języka Java - link do artykułu  DOI