The comment in the initial code says to move 1's to the end.

A really cool brainteaser. At first glance I did not think it was possible to do with regular expressions. I've been unable to get this kata off my mind, and I am very happy to finally have solved it.

Could possibly use more test cases than 4.
Does it have random tests?

I get a similar issue in coffeescript. I pass the hardcoded tests, but get the same error for all random tests:

ReferenceError: time2snd is not defined
  at .:91:16
  at Array.map
  at stat1231
  at .:131:36
  at Object.Test.it
  at .:130:12
  at Object.Test.describe
  at .:55:8
  at .:138:3

I get an error running test, but get a pass when submitting solution

the wording of the question, seems to written by a non-native english speaker

One of the provided tests are incorrect.
Verification tests do not provide an error message