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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
175 other people pass the JS Kata and didn't have the same problems with the random tests, so chances are that your code is slightly wrong but only fails in rare cases
If it is the Kata is at fault then I want to fix it, but nothing can be fixed unless you give more information like:
If you can come back with supporting evidience of a real problem them please report it again as an issue.