Where you need one mock, you probably need the other

bookwyrm/tests/views/test_readthrough.py

@@ -22,7 +22,9 @@ class ReadThrough(TestCase):
             title="Example Edition", parent_work=self.work
         )
 
-        with patch("bookwyrm.suggested_users.rerank_suggestions_task.delay"):
+        with patch("bookwyrm.suggested_users.rerank_suggestions_task.delay"), patch(
+            "bookwyrm.activitystreams.populate_stream_task.delay"
+        ):
             self.user = models.User.objects.create_user(
                 "cinco", "cinco@example.com", "seissiete", local=True, localname="cinco"
             )