Unable to run test cases

[stkgo]

Describe the bug
I am unable to run the test cases. They all complain with

E   ModuleNotFoundError: No module named 'scprep'

To Reproduce
Standalone code to reproduce the behavior:

cd scprep
pytest -vv

Expected behavior
I would expect all of the tests to run and pass

Actual behavior
Test cases all fail with:

E   ModuleNotFoundError: No module named 'scprep'

scprep version
Lastest commit from master