def METHOD_NAME(self):
    with mock.patch("sales.services.is_adult") as is_adult:
        is_adult.return_value = True
        response = self.client.get(
            reverse("sales:order-pay", kwargs={"pk": self.o1.pk}), follow=False
        )
        self.assertEqual(200, response.status_code)
        self.o1.refresh_from_db()
        self.assertEqual(self.o1.payer, self.member)