I'm pretty sure that the fix for #5313 is incomplete. It does the right thing for pytest, but not for unittest. I'm opening a new issue (rather than re-opening #5313) since the old issue has already been closed.

The main problem is that in src/client/testing/unittest/services/discoveryService.ts, failures are ignored in the script that gets run (see getDiscoveryScript()). They should be logged and dealt with.

One possible solution could be to update the adapter script to handle unittest (in addition to the current pytest support).