I think it might be a glitch, because mattface (below) had the same issue but I couldn't find anything wrong with it when I tried it.

Test case functions do not have the same name as the written function.

huh, strange.

When I did it, the example code was scoreTest, but the test cases were calling score_test.

Seems fine now.

I can't seem to find anything wrong. Can you tell me where it is?

function name was wrong, didnt match test cases