remeber to opitize your code

This is supposed to be an 8 kyu: e.g. principal of least surprise. Would you do this to your intern on their first day?

for the love of all that is holy and more, what do you propose should be added?

the description is crystal clear, anything more would be too revealing for the solution

that's not your function that takes that many arguments, but the function that will call yours, to do the tests.

YOU FIX YOUR CODE.

Copy your code and click reset. I can see two sample tests and both are fine, maybe you edited them somehow.

Sometimes it is even necessary ;)

...
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
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Zen of Python