'Test with failed grades and deadline is still open or not defined.'

@ddt.data((0.5, None), (0.51, None), (0.4, VALID_DUE_DATE))
@ddt.unpack
def test_min_grade_requirement_failed_grade_valid_deadline(self, grade, due_date):

    self.assert_requirement_status(grade, due_date, None)
