def METHOD_NAME(self, preprocessors, gradebook, resources):
    """Is a changed markdown cell correctly graded?"""
    cell = create_grade_and_solution_cell("hello", "markdown", "foo", 1)
    cell.metadata.nbgrader['checksum'] = compute_checksum(cell)
    nb = new_notebook()
    nb.cells.append(cell)
    preprocessors[0].preprocess(nb, resources)
    gradebook.add_submission("ps0", "bar")
    cell.source = "hello!"
    preprocessors[1].preprocess(nb, resources)
    preprocessors[2].preprocess(nb, resources)
    assert cell.metadata.nbgrader['score'] == 0
    assert cell.metadata.nbgrader['points'] == 1
    assert cell.metadata.nbgrader['comment'] is None