Issue is too unspecific. You could at least mention in which language the last test case is wrong. Closing.

Whoops, sorry. Seems like I accidentially forgot to change Integer -> Integer to Int -> Integer in the initial solution. Should be fixed. Just change the type of your function to Int -> Integer and you should be fine.

It's not really cheating, it just has a rather basic error. You should test it a bit more.