text: 
  import pytest
  from rest_framework import status
  from rest_framework.reverse import reverse
  
  pytestmark = pytest.mark.django_db
  
  
  def test_all_good(client):
      """Test all good."""
      url = reverse('ping')
      response = client.get(url)
      assert response.status_code == status.HTTP_200_OK
      assert '<status>OK</status>' in str(response.content)
      assert response._headers['content-type'] == ('Content-Type', 'text/xml')
  