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JMIT
Finds tests that pass even when your code is broken
JMIT detects zero-assertion tests, assert True patterns, and mock-only pytest functions that never catch bugs then auto-repairs them with mutation-verified replacements. 7-day free trial.
I built JMIT after a python project of mine with an alleged 92% coverage missed several prod bugs for weeks even though every test passed. The problem wasn't coverage, half our tests were asserting True, written as implementation instead of tests or mocking everything without ever binding to real behavior.
JMIT will find these patterns (zero-assertion, assert True, mock-only tests) then verifies replacements using mutation testing: it breaks your code in small ways and confirms the new tests actually fail when they should.
Happy to answer questions about how mutation verification works or how it handles large suites and would love to hear if anyone else has been burned by tests that always pass.
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About JMIT on Product Hunt
“Finds tests that pass even when your code is broken”
JMIT was submitted on Product Hunt and earned 4 upvotes and 1 comments, placing #159 on the daily leaderboard. JMIT detects zero-assertion tests, assert True patterns, and mock-only pytest functions that never catch bugs then auto-repairs them with mutation-verified replacements. 7-day free trial.
JMIT was featured in Developer Tools (515.5k followers), Tech (627.5k followers) and Vercel Day (20 followers) on Product Hunt. Together, these topics include over 241.5k products, making this a competitive space to launch in.
Who hunted JMIT?
JMIT was hunted by Julian Novosad. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Julian Novosad