Migrating Junit4 tests to androidx: What causes 'delegate runner could not be loaded'?

Question

I am migrating my app to androidx, I can\'t seem to get my unit tests working. I took example from Google\'s AndroidJunitRunnerSample, which has been updated to use the new

Answer 1

Some other possible reasons:

• Having only @SmallTest (or Medium-/Large-) test methods. Marking at least one method with @Test solves the issues.
• setup() / teardown() methods are not public.