def test_assertNotIsInstanceMultipleClasses(self):
        """
        Test a true condition of assertNotIsInstance and multiple classes.
        """
        A = type('A', (object,), {})
        B = type('B', (object,), {})
        C = type('C', (object,), {})
        a = A()
        self.assertNotIsInstance(a, (B, C))

        Test a true condition of assertNotIsInstance and multiple classes.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/trial/test/test_assertions.py