diff --git a/tests/admin_widgets/tests.py b/tests/admin_widgets/tests.py
index 15e11a6d8f..671915ea60 100644
--- a/tests/admin_widgets/tests.py
+++ b/tests/admin_widgets/tests.py
@@ -944,6 +944,7 @@ class RelatedFieldWidgetWrapperTests(SimpleTestCase):
         self.assertIn("<a ", output)
 
     def test_data_model_ref_when_model_name_is_camel_case(self):
+        self.maxDiff = None
         rel = VideoStream._meta.get_field("release_event").remote_field
         widget = forms.Select()
         wrapper = widgets.RelatedFieldWidgetWrapper(widget, rel, widget_admin_site)
@@ -958,7 +959,7 @@ class RelatedFieldWidgetWrapperTests(SimpleTestCase):
           </select>
           <a class="related-widget-wrapper-link add-related" id="add_id_stream"
              data-popup="yes" title="Add another release event"
-             href="/admin_widgets/releaseevent/add/?_to_field=album&amp;_popup=1">
+             href="/admin_widgets/releaseevent/add/?_to_field=album&amp;_popup=1&_source_model=VideoStream">
             <img src="/static/admin/img/icon-addlink.svg" alt="" width="24" height="24">
           </a>
         </div>