using moto s3 with django test client to test a http redirect to an s3 presigned url

I'm trying to provide a redirect to an s3 presigned url generated via boto3, it looks like it should work but I want to write a testcase for it.

I've checked with something similar to what's below. The test_redirect_to_presigned_url() fails with a test_bucket/testfile.png not found. While the test_motos3_presigned_url works as expected.

from django.test import TestCase
from django.test import Client


class MotoS3TestCase(TestCase):
    def setUp(self):
        self.mock = mock_s3()
        self.mock.start()
        self.bucket_name = 'test_bucket'
        self.conn = boto3.resource('s3')
        self.conn.create_bucket(Bucket=self.bucket_name)
        self.s3 = boto3.client('s3')

    def tearDown(self):
        self.mock.stop()

    def test_redirect_to_presigned_url(self):
        client = Client()
        response = client.get('/url/to/view/', follow=True)   
        self.assertTrue(response.status_code == 200, f'response: {response}, response.content: {response.content}')         

    def test_motos3_presigned_url(self):
        keyname = 'testfile.png'  
        self.s3.upload_fileobj(io.BytesIO(b'somefile content'), self.bucket_name, keyname)
        params = {
            'Bucket': self.bucket_name,
            'Key': keyname,
        }

        presigned_url = self.s3.generate_presigned_url(
            ClientMethod='get_object',
            Params=params,
            ExpiresIn=3600,
            HttpMethod='GET'
        )
        import requests
        response = requests.get(presigned_url)

        self.assertTrue(response.status_code == 200, f'response: {response}, response.content: {response.content}')

views.py

import boto3
from django.http import HttpResponseRedirect


def redirect_to_presigned_url(request):
    s3 = boto3.client('s3')
    keyname = 'testfile.png'  
    self.s3.upload_fileobj(io.BytesIO(b'somefile content'), self.bucket_name, keyname)
    params = {
                'Bucket': self.bucket_name,
                'Key': keyname,
    }

    presigned_url = self.s3.generate_presigned_url(
                ClientMethod='get_object',
                Params=params,
                ExpiresIn=3600,
                HttpMethod='GET'
    )
    return HttpResponseRedirect(redirect_to=presigned_url)

It appears that moto doesn't integrate well with the django test client. Is there a good why I can create a testcase to check this redirect?