@anton_akhmerov - Thanks for the file it was helpful. We have run into some cases, like yours, in which the implementation for the code coverage doesn’t handle absolute paths well. We have an issue open and a documented workaround for coverlet is noted in there. I’m not sure if a similar workaround approach would work here for you or not.
You can follow along on the issue as we make progress here and we will use your case to validate the fix before shipping it.
-James H - GitLab Product Manager