[jasamer]

I don't think #1 matters, because it runs again once it's in a valid state again. Your test will fail while in an invalid state, but that's to be expected.

As the author explained in another comment, it initially generates the code coverage for all tests. When code is changed, only the tests that cover that code are rerun.

[_cfl0]

Furthermore, it will still display the build error + the previous failure list.

So you can always rely on that background terminal for actual test failure reasons.