It is not an issue to me. Just follow the subject.

How could it be explained better ?

I am shame.

I substituted a broken version for the original correct one because I hadn't double-checked the tests.

My apologies. I hope it's better now... :-(

Thank you for your feedback.

Thanks for the heads up! In the JS and CS tests, I was inserting Dates that would return true, but forgot to include that in the Ruby tests.