我在Django（4.2.1）中使用djangorestframework版本3.14.0测试API端点。
我们有这样的代码：

from django.core.management import call_command
from rest_framework import status
from rest_framework.authtoken.models import Token
from rest_framework.test import APITestCase
from account.models import Member, Organization, PhoneNumber
from authorization.models import AuthSMSCode

class SetUp(APITestCase):
    @classmethod
    def setUpTestData(cls):
        # super().setUpClass()
        cls.username = 'sudo'
        cls.member = Member.objects.create_user(first_name='DefaultUser', email='default@gmail.com')
        cls.organization = Organization.objects.create(name="Google", legal_address='1040 Brussels')
        cls.member.organizations.add(cls.organization)
        cls.member.save()
        cls.organization.save()
        cls.phone_number = PhoneNumber.objects.create(number='9999999999', member=cls.member)
        code = 12345
        cls.smscode = AuthSMSCode.objects.create(value=code, phone_number=cls.phone_number)
        Token.objects.create(user=cls.member)
        call_command('create_default_roles')

class ApiTestCaseGroups(SetUp, APITestCase):

    def test_authorized(self):
        self.client.credentials(HTTP_AUTHORIZATION='Token ' + self.member.auth_token.key)
        url = ...
        response = self.client.get(url, format='json', REMOTE_USER=self.username)
        expected_output = ...
        response_result = response.json()
        self.maxDiff = None
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response_result, expected_output)

class ApiTestCaseMembers(SetUp, APITestCase):

    def test_authorized(self):
        self.client.credentials(HTTP_AUTHORIZATION='Token ' + self.member.auth_token.key)
        url = .....

        response = self.client.get(url, format='json', REMOTE_USER=self.username)
        expected_output = ...
        response_result = response.json()
        self.maxDiff = None
        self.assertEqual(response.status_code, status.HTTP_200_OK)
        self.assertEqual(response_result, expected_output)

如果我们将ApiTestCaseGroups和ApitTestCaseMembers作为类单独运行，它们可以正常工作。但是，当我们将整个文件作为测试manage.py test运行时，它在测试№2 ApiTestCaseMembers时失败，因为对象为空（它返回代码200，因此我们进行了身份验证，但response_result内部没有对象）。
我看到了一些类似的问题，但这些解决方案在这里不起作用。我们应该朝什么方向去解决这个问题？