@patch("moztrap.model.mtmodel.datetime")
    def test_reorder_versions_does_not_change_modified_on(self, mock_dt):
        mock_dt.datetime.utcnow.return_value = datetime(2012, 1, 30)
        pv = self.F.ProductVersionFactory.create()

        mock_dt.datetime.utcnow.return_value = datetime(2012, 1, 31)
        pv.product.reorder_versions()

        self.assertEqual(
            self.refresh(pv).modified_on, datetime(2012, 1, 30))
        self.assertEqual(
            self.refresh(pv.product).modified_on, datetime(2012, 1, 30))
Updating latest product version does not change modified_on.
dataset/ETHPy150Open mozilla/moztrap/tests/model/core/models/test_productversion.py/ProductVersionTest.test_reorder_versions_does_not_change_modified_on