Minor Description
I was running a python test which was extremely slow and I was surprised the unit-tests.log has not been even created. Looked into the code and as I got the tests can be executed in parallel and each one has its own temporary output file which is only added to the unit-tests.log when a test is finished with a failure (after acquiring a lock to avoid parallel write on unit-tests.log).
To avoid such a confusion it would make sense to log out the path of those temporary output files.
