On Flaky Tests, Time Precision, and Order Dependence

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A flaky test is one that fails unpredictably, without a corresponding change in the code under test. These often show up in CI runs where a test unrelated to any change made suddenly fails, and then mysteriously passes when re-run. There are many type and causes of “flakes”. Today I want to talk about flaky tests caused by time precision, and time-order dependence.

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