@pytest.mark.parametrize('model', CLASSES)
def test_column_width_sum(model):
 assert (sum(model.COLUMN_WIDTHS) == 100)

@ pytest . mark . parametrize ( 'model' , CLASSES ) def test_column_width_sum ( model ) : assert ( sum ( model . COLUMN_WIDTHS ) == 100 )
test if the sum of the widths asserts to 100 .