Not the case now with Node 18's default messages upon failure ^^

expected undefined to equal 4

fixed some time ago

Your comment was written 6 years ago, but the sample tests are okay now, when I tried my first attempt.

fixed sometime ago

Fixed some time ago

It's still a mistake. The correct answer is 'A', not 'A#'.
This should be an issue, actually.

Duplicate suggestion below

fixed by someone

6 years later, fixed

done

fixed alr