Given that this is a bug-fixing kata and that the reference solution correctly changed that 1 to a 0, shouldn't there be a test with only 1 word in it?
Ideally, the tests would compare the fixed version to the buggy version and do something with that, but I understand that's hard. Nothing now is to stop us from just rewriting it completely though.
Creating decent bug fixing kata is hard ..
No random tests.
One for @nbeck
Hahah this was a hilarious Kata! Thank you!