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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.
It still happens with the Java random test.
Not a kata issue, you're not printing the input always, so, you're confusing the log of one test with the expected answer of a different one. 0 is a Narcissitic number and your code says it isn't.
Please state the language when reporting an issue, this kata has many.