• no random tests
• no sample test setup

Is that something only the author can do?

Yes, I think so.

I've tried removing it, but it won't go away. Is that something only the author can do?

https://www.codewars.com/kata/5cde6f28e0d20e001ff403b9/solutions/javascript

Thanks for the hint. Fixed.

Thanks for the hint. Can you point me to which one exactly you are reffering to?

uint32_t is in std:: and is defined in cstdint. cstdint should be included.

There's an unrelated JS version.