def METHOD_NAME(self):
    # I didn't import the sys module so this child will fail.
    with self.assertRaises(AssertionError) as error_context:
        script_helper.assert_python_ok('-c', 'sys.exit(0)')
    error_msg = str(error_context.exception)
    self.assertIn('command line:', error_msg)
    self.assertIn('sys.exit(0)', error_msg, msg='unexpected command line')