def METHOD_NAME(self):
    """Test callback for fixing units."""
    cube = _create_sample_cube()
    temp_file = self._save_cube(cube)
    cubes = load(temp_file, callback=concatenate_callback)
    cube = cubes[0]
    self.assertEqual(1, len(cubes))
    self.assertTrue((cube.data == np.array([1, 2])).all())
    self.assertTrue((cube.coord('latitude').points == np.array([1,
                                                                2])).all())
    self.assertEqual(cube.coord('latitude').units, 'degrees_north')