There should be a test that checks to see if you created the deck correctly since they specify the type of deck. (Or maybe they should make it for us since the shuffling seems to be what this kata is testing) Your kata will still pass if 'dog' is a card.

Also, since it is a little unclear, here is hint: if someone inputs a cheatcode number it should have the same output every single time that cheatcode is put in. HOWEVER, the output for a different cheatcode should not be the same as any other cheatcode number. 6 should not give the same deck as 8 and so on.