Great job! Only the last check seems to be unnecesary

I guess that the author tried to implement some HTML tags inside of tests description which didn't work. Maybe it not a big deal, but will defintely look better if changed.

1590 is < span style="color: #888; font-weight: bold;">a boring number< span> - Expected: 0, instead got: undefined
Completed in 1ms
should handle palindromic numbers
101 is < span style="color: #0F0; font-weight: bold;">awesome! Look at it!< span> - Expected: 2, instead got: undefined

I agree, so far I have never spent more than a few hours on any kata, this one took literaly 3 days of my life.