You need to return this result, not print it to console.

Using python 3.11, getting the following results.
Test Results:
Fixed Tests
Basic Test Cases
Log
S.H
None should equal 'S.H'
Log
P.F
None should equal 'P.F'
Log
E.C
None should equal 'E.C'
Log
P.F
None should equal 'P.F'
Log
D.M
None should equal 'D.M'