Checking exercises...
[warn] flower-field: missing 1 test case
- multiple adjacent flowers (6e4ac13a-3e43-4728-a2e3-3551d4b1a996)
[warn] isbn-verifier: missing 2 test cases
- only one check digit is allowed (8005b57f-f194-44ee-88d2-a77ac4142591)
- X is not substituted by the value 10 (fdb14c99-4cf8-43c5-b06d-eb1638eff343)
[warn] some exercises are missing test cases