Skip to end of metadata
Go to start of metadata

There will always be flaky tests, and tests that once breezed through with no problem can fail for what seems like no reason. The trick is figuring out whether a test that fails does so because it found a real problem in your app functionality, or because there was an issue with the test itself. 

The best way to handle this problem is to log your failing tests into a database and then analyze them. Even tests that fail intermittently with no apparent cause may turn out to have a pattern when you are able to analyze them in detail and as a larger data set. If this is beyond the scope of your testing setup, the next best strategy is to log your failing cases into a log file that records the browser, version, and operating system for those tests, and then retry those tests. If they continue to fail after a second or third retry, chances are that the issue is with the functionality you're testing, rather than the test itself. This isn't a total solution for dealing with flakes, but it should help you get closer to the source of the problem.