Getting response code 302 instead of 200 while testing a url

I have a django named blog and trying to test the url. The code for testing is :-

class PostTests(TestCase):

    def setUp(self):

        self.user = get_user_model().objects.create(username='some_user')

        self.title = "test-title"

        Post.objects.create(

            title=self.title, user=self.user,

            publish=datetime.date.today()

        )

    def test_post_list(self):

        response = self.client.get('/posts/search/')

        self.assertEqual(response.status_code, 200)

    def test_post_create(self):

        response = self.client.get('/posts/create/')

        self.assertEqual(response.status_code, 200)

    def test_post_update(self):

        response = self.client.get('/posts/test-title/update/')

        self.assertEqual(response.status_code, 200)

    def test_post_delete(self):

        response = self.client.get('/posts/test-title/delete/')

        self.assertEqual(response.status_code, 200)

The problem here is that my test cased passed for the first 2 functions i.e. "test_post_list" and "test_post_create" but now working for other two test functions i.e "test_post_update" and "test_post_delete". What might be the problem ?

The setup function that i made is supposed to create a object of model named "Post", then what might be the problem ?

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