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Changes between Initial Version and Version 1 of Ticket #20093, comment 3

initial	v1
1	1	What I would do is mock the object and check that the save method is called with the proper args (ie. update_fields as required in this case). In case you don't know it, what I would use to mock this is python mock library: https://pypi.python.org/pypi/mock
	2
	3	You might want to check its `assert_called_once_with` method.