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 am facing the same issue.
I have passed every single individual test case.
But whenever i try to execute two test cases, it shows the error that you mentioned
"returns false when expected true"
There is clearly something wrong with the check
assertEquals(isogram.isIsogram("moOse") , false);
yep, there is mistake