That would not happen because each of my integration test cases are properly isolated form each other. If any specific test case starts failing, I just disable all other test cases and start debugging the affected code path; it usually only takes me a few minutes to identify even the most complex problems. Also, because I use a TDD approach, I usually have a pretty good idea about what changes I might have made to the code which could have introduced the issue.

Unit tests on the other hand are useless at identifying complex issues like race conditions; they're only good at detecting issues that are already obvious to a skilled developer.

* I restart the system from scratch between each test case but if that's too time-consuming (I.e. more than a few milliseconds), I just clear the entire system state between each test case. If the system is truly massive and clearing the mock state between each test case takes too long, then I break it up into smaller microservices; each with their own integration tests.