I received the same error. I don't think this is working for Python.
Traceback (most recent call last):
File "main.py", line 3, in
import codewars_test as test
ModuleNotFoundError: No module named 'codewars_test'

I think the Python test cases are broken. I switched to CoffeeScript, and my solution passed.

what is going on with this kata?
i pass all tests in my system.
i check every single case that is interpeted as wrong with your tests in my python3.7 ide and all is correct based on your expected outputs
wtf?

this kata is broken
no tests for python at least

Traceback (most recent call last):
File "main.py", line 3, in
import codewars_test as test
ModuleNotFoundError: No module named 'codewars_test'

Just solved it, though it took time. To my point of view this is an easy kata.
The problem is that the description does not help at all.