human
I wrote the below code

    @step('I    run    two    subordinate    steps')
    def two_subordinate_steps(step):
        step.behave_as('\n                                                When    I    run    the    first    sub-step\n                                                And    I    run    the    second    sub-step\n                                ')
    global first_ran
    global second_ran
    first_ran = False
    second_ran = False
    @step('I    run    the    first    sub-step$')
    def increment(step):
        global first_ran
        first_ran = True
    @step('I    run    the    second    sub-step')
    def increment_twice(step):
        global second_ran
        second_ran = True
    runnable_step = Step.from_string('Given    I    run    two    subordinate    steps')
    runnable_step.run(True)
    assert_equals((first_ran, second_ran), (True, True))
    del first_ran
    del second_ran

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

def test_multiple_subordinate_steps_are_run():