pytest collection overwrites testcases in monorepo like structure

Hi

I have a monorepo, where I have following directory structure

Project/
      repo/
             pkg1/
                     src/
                     tests/
                            …
                            __init__.py
                           test_main.py
             pkg2/
                     src/
                     tests/
                            …
                            __init__.py
                           test_main.py

I also have other mini packages which don’t follow src layout, I have added —import-mode=importlib in root pyproject for addopts
But what I am seeing is test_main.py for pkg2 gets overwritten for pkg1 I.e. in test_main.py for pkg1 I have 3 test cases and in test_main.py for pkg2 I have 8 tests cases, but when I see in logs of pytest I see

…
pkg2/tests/test_main . . . # should have eight

From my understand and my guess is this is happening because when pytest resolves unique path for each it might be picking tests.test_main for both.

I tried verbose run and I can see the test name from pkg1 in path of pkg2

I needed some help guidance / help to point me in right direction to properly setup this for my usecase

Thanks !

Originally posted by @indiVar0508 in https://github.com/pytest-dev/pytest/discussions/13749

Start with the root pyproject and the two similarly named files, pkg1/tests/test_main.py and pkg2/tests/test_main.py. Run pytest in verbose mode with the existing importlib setting and compare collection and test names for both packages. Done means the cause of the overwritten collection is isolated and the expected three and eight tests remain distinct, with a focused regression test or clear reproduction.