This might be related: #93357

Another possible source of flakiness is the use of small timeouts in tests, like 0.1 or even 0.01 seconds. Making the timeouts larger makes the tests run slower, but the short timeouts occasionally flake out. There should be other ways to wait for certain things to happen in most cases, like creating an Event object and awaiting that, instead of sleeping.

Longer timeouts (e.g. 1, 2 or 3 seconds) are less likely to be suspicious, timeouts like that are meant to be never hit unless the test is actually failing. Making these too long would just cause tests to take longer to report failure.

See also #82504