Weird behavior when using a subdomain and doing a request from another host on tests

readthedocs/rtd_tests/tests/test_subprojects.py

@@ -5,6 +5,7 @@
 from django.contrib.auth.models import User
 from django.test import TestCase
 from django.test.utils import override_settings
+from django.core.urlresolvers import reverse, set_urlconf
 
 from readthedocs.projects.forms import ProjectRelationshipForm
 from readthedocs.projects.models import Project, ProjectRelationship
@@ -185,6 +186,8 @@ def setUp(self):
         relation.save()
         fixture.get(Project, slug='sub_alias', language='ya')
 
+    def tearDown(self):
+        set_urlconf(None)
 
     @override_settings(
             PRODUCTION_DOMAIN='readthedocs.org',
@@ -200,9 +203,25 @@ def test_resolver_subproject_alias(self):
 
     @override_settings(USE_SUBDOMAIN=True)
     def test_resolver_subproject_subdomain_alias(self):
+        url_name = 'project-sync-versions'
+
+        url = reverse(url_name, args=[1])
+        self.assertEqual(url, '/api/v2/project/1/sync_versions/')
+
         resp = self.client.get('/projects/sub_alias/', HTTP_HOST='pip.readthedocs.org')
+
+        # Here Django fails to reverse the same url name
+        #  url = reverse(url_name, args=[1])
+        #  self.assertEqual(url, '/api/v2/project/1/sync_versions/')
+
         self.assertEqual(resp.status_code, 302)
         self.assertEqual(
             resp._headers['location'][1],
             'http://pip.readthedocs.org/projects/sub_alias/ja/latest/'
         )
+
+
+class TestClass(TestCase):
+
+    def test_other_test(self):
+        reverse('project-sync-versions', args=[1])