Damnit, I thought I had it as short as possible. :(

Explain yourself plz. I tried putting "testing" and it says:

Traceback (most recent call last):
  File "tests.py", line 3, in <module>
    from solution import super_ints as si
ImportError: cannot import name 'super_ints' from 'solution' (/workspace/default/solution.py)

I don't get what you mean by "Test cases can pass if you put a string".
Can you elabrate your issue?

It is the duty of the Kata author(s) to enforce any rules in the test cases

you should obey the rules！！

at first the solution was placed in preloaded, so any string in solution area counted as correct solution. But now author fixed this problem.

Explain yourself, plz. What's the problem?

I have no idea what you're talking about, but I'm not responsible for your hard feelings about that.

Well, I came up with the idea by my own. Probably great minds think alike. Do you think it shoud be deleted?

You are solving problems together without sharing solutions?!

Thanks! I'll double check it!:)

Here's an example of a duplicate: (same task but the numbers that need to be compared are different and the return values are different too)

https://www.codewars.com/kata/57a429e253ba3381850000fb