human
I wrote the below code

    py_file = testdir.makepyfile("\n                import    pytest\n                @pytest.mark.parametrize('abc',    [1,    2,    3])\n                class    Test1(object):\n                                def    test_1(self,    abc):\n                                                assert    abc    in    [1,    2,    3]\n                ")
    file_name = os.path.basename(py_file.strpath)
    rec = testdir.inline_run(file_name, file_name)
    rec.assertoutcome(passed=6)

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def test_marked_class_run_twice(testdir, request):