AssertionError: 7 is not divisible by 3 or 5

what's wrong?

def checkio(number: int) -> str: if number % 3 == 0 and number % 5 == 0: return "Fizz Buzz" elif not number % 5 == 0: return "Fizz" elif not number % 3 == 0: return "Buzz" else: return str(number)