What Are Flaky Tests? Causes, Impact, and How to Fix Them (opens in new tab)

You run your test suite, and a test fails. You rerun it without changing anything, and it passes. This is what engineers call a flaky test. It’s a test that produces inconsistent results on identical code and configuration. This non-deterministic behavior means the test failure doesn't point to a real bug but rather a problem with the test itself or the environment it runs in. Every engineering team that runs automated tests at any scale has dealt with flakiness. And most have developed the s...