Sublist - All tests pass except for one (which does not even call the function)

Hi,
I initially did this exercise using the string 'in" method, but it kept failing on just one test. When I went for help, I saw that this is not the correct way of doing the exercise, so I changed it to loop through the lists and compare elements.

I am still failing on 1 test case and this test case does not even call the function for this exercise. See below.

Code Run

self.assertEqual(len(set([SUBLIST, SUPERLIST, EQUAL, UNEQUAL])), 4)

Test Failure

AssertionError: 1 != 4

Any help is greatly appreciated.
Thanks!

That test assets that your constants use unique values. Otherwise you can simply do this.

SUBLIST = 5
SUPERLIST = 5
EQUAL = 5
UNEQUAL= 5

def sublist(a, b):
  return 5

Thanks, that helped.