Loading collection data...
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.
I think maybe it's saying that your cipher function returned 'eta' and the test was expecting 'qxz'. There aren't any problems with the test cases, but maybe the message should be more clear (in which case, you could write to Codewars saying their assertEquals output on test failure is confusing).