Installed python package not able to find module in own directory

I recently got my new Macbook Pro and installed 3.8.6 with pyenv and created a virtualenv for my project. When I try to run the tests for this project i get the following error about a module not found by a dependency (abridged). The the files are all there, ad_manager is a file right next to the __init__.py file that is importing it. This was not a problem on my old machine.

echo $PYTHONPATH is empty

python -c 'import sys; print(sys.path)' -> ['', '/Users/derek/.pyenv/versions/3.8.6/lib/python38.zip', '/Users/derek/.pyenv/versions/3.8.6/lib/python3.8', '/Users/derek/.pyenv/versions/3.8.6/lib/python3.8/lib-dynload', '/Users/derek/.pyenv/versions/VIRTUAL_ENV_3.8.6/lib/python3.8/site-packages']

Traceback (most recent call last):   File "/Users/derek/dev/PATH_TO_PROJECT/tests/../src/services/adwords_service.py", line 18, in <module>     from googleads import oauth2, adwords   File "/Users/derek/.pyenv/versions/VIRTUAL_ENV_3.8.6/lib/python3.8/site-packages/googleads/__init__.py", line 17, in <module>     from ad_manager import AdManagerClient ModuleNotFoundError: No module named 'ad_manager'