Django test UpdateView with post request

I have a simple UpdateView which I want to test:

def test_valid(self):
        response = self.client.post(self.path, {
            'name': self.obj.name,
            'country': self.obj.country,
            'gender': self.obj.gender,
            'about': self.obj.about,
            'email': self.obj.email,
            'city': 'new city name',
            'zip': self.obj.zip,
        })
        self.assertEqual(response.status_code, 200)
        self.obj.refresh_from_db()
        self.assertEqual(self.obj.city, 'new city name')

How can I avoid to write all the values that I don't want to update again?