When doing python3 setup.py install on a local checkout of the code, files from git/test will be installed into the standard site-packages directory.
This mean that theoretically even the requirements from test-requirements.txt are mandatory for the base package and secondly it isn't necessary as the chances that an user is actually using the test code are pretty low.
So overall it doesn't make much sense to me.

Is there any way to avoid having the test files installed via setuptools?