He already told you, it's the best practice.

Thx Blind4Basics I will learn to read correctly !

expected '-58:-50:03' to equal '-58:50:03'
          ^ yours               ^expected output
          
'-58:-50:03'
     ^ this is incorrect

Newer versions of JavaScript should be enabled.

LOL

Good one, ranked it 7kyu, keep it up :D

Thanks! It's fixed!

I've got this:
Expected: -09:52:60, instead got: -09:53:00
It's seems not right.

:)

I added some random test cases!

Needs random test cases :(