The tests fail due to the following:

File "/home/marshjo/Documents/clarity-docusign/docusign-python-client/test/unit_tests.py", line 22, in <module>
 PrivateKeyBytes = base64.b64decode(os.environ.get("PRIVATE_KEY"))

I suspect that is because your default internal setup includes this. Please add a "Testing" section to the README to cover testing requirements.