I personally almost never run a full test run on my local machine for any project where the test run will take longer than a couple of minutes. Generally speaki

I personally almost never run a full test run on my local machine for any project where the test run will take longer than a couple of minutes. Generally speaking, my local computer can only reasonably have the code in one state at a time, and any time spent running the test suite on a potentially finished change is time that could have been spent working on something else. I never merge something to master, or any branch that I expect other people to use without knowing that it's going to pass, but I don't see any harm in having failing builds on a personal branch (particularly if I later clean up my commits to ensure that no individual commit that gets to master ever fails).