'Verify that check_nonce fails with badly formatted nonce'

@ddt.data(('01234567890123456789012345678901234567890123456789012345678901234',), ('',), (None,))
@ddt.unpack
def test_invalid_nonce(self, nonce):

    self.assertFalse(SignatureValidator(self.lti_consumer).check_nonce(nonce))
