The task is irrelevant to the tests. In fact, bloom filter isn't even necessary since the kata only asks for a lossy map, and doesn't test the specifics of a bloom filter.

When the tests "hash_function_control", "register_and_check", "approximate_error_rate", and "overload" succeed, no assertion function (cr_something) are being called. That's why these red triangle appear in the test results. If you want the usual regular green test results for correct solution, you should call at least one assertion function in each test.

BTW: If you want a literal % in a format string, use %%.

There're so many parsing problems I doubt creating more trivial ones would benefit anybody.

just one test? Is it serious?

    'id': 'Jean',                  # the client id is a string of 12 digits

    'name': '0612358745',          # name of the client : 2 chars minimum
                                   # and all caps