class TestNumbers: def test_numbers(self): assert 1 == 1 class TestSubclass(Subclass): def test_subclass(self): assert 1 == 1 class Test_underscores_and_123(Subclass): def test_underscores(self): assert 1 == 1 class UnittestClass(unittest.TestCase): def test_unittest(self): assert 1 == 1 class SomeTest(TestCase): def test_foo(self): foo = date(2017, 11, 16)