Older kata (many of the ones I created) don't have sample tests for all languages. There was a point where there just wasn't sample tests at all (as a feature) - it was always a blank area for you to write your own tests.

From a UX point of view, can you help me understand what was confusing? At what point did you read the comments and inteprete "This is just an example of how you can write your own TDD tests" to literally mean "these are just examples, write your own"? The comments in the test cases say that you should replace the examples, were those not helpful? Any suggestions on how it could have been more obvious?

Edit: To be clear, sample tests have nothing to do with passing the kata. You must attempt the kata to pass it.