Make a fork, add the tests you want. And you're contradicting yourself saying how to pass the random tests. How is that not "giving any meaningful information about how to solve the problem"?

Hi, read this: https://docs.codewars.com/training/troubleshooting/#print-input

The test is:

test.expect(not is_valid_walk(['w']), 'should return False');

The problem is tests using test.expect are hardly redable (I believe those tests should be rewritten).

test.expect checks if its first argument is True. If it is not, the test fails and the message (the second argument) is displayed.

So actually this test checks that (not is_valid_walk(['w']) is true <≃> is_valid_walk(['w'] is false.