diff --git a/wagtail/contrib/settings/tests/test_admin.py b/wagtail/contrib/settings/tests/test_admin.py
index eaa479e1fa..8adb43707c 100644
--- a/wagtail/contrib/settings/tests/test_admin.py
+++ b/wagtail/contrib/settings/tests/test_admin.py
@@ -142,7 +142,7 @@ class TestMultiSite(BaseTestSettingView):
         """
         start_url = reverse('wagtailsettings:edit', args=[
             'tests', 'testsetting'])
-        dest_url = 'http://testserver' + reverse('wagtailsettings:edit', args=[
+        dest_url = reverse('wagtailsettings:edit', args=[
             'tests', 'testsetting', self.default_site.pk])
         response = self.client.get(start_url, follow=True)
         self.assertRedirects(response, dest_url, status_code=302, fetch_redirect_response=False)
@@ -154,7 +154,7 @@ class TestMultiSite(BaseTestSettingView):
         """
         start_url = reverse('wagtailsettings:edit', args=[
             'tests', 'testsetting'])
-        dest_url = 'http://example.com' + reverse('wagtailsettings:edit', args=[
+        dest_url = reverse('wagtailsettings:edit', args=[
             'tests', 'testsetting', self.other_site.pk])
         response = self.client.get(start_url, follow=True, HTTP_HOST=self.other_site.hostname)
         self.assertRedirects(response, dest_url, status_code=302, fetch_redirect_response=False)