diff --git a/docker-compose-tests.yml b/docker-compose-tests.yml
index 280f6c3..eae4264 100644
--- a/docker-compose-tests.yml
+++ b/docker-compose-tests.yml
@@ -26,6 +26,7 @@ services:
     environment:
      - MICROBLOGPUB_AMQP_BROKER=pyamqp://guest@rmq//
      - MICROBLOGPUB_MONGODB_HOST=mongo:27017
+     - MICROBLOGPUB_DEBUG=1
   mongo:
     image: "mongo:latest"
   rmq:
diff --git a/tasks.py b/tasks.py
index 6cad65b..6de6575 100644
--- a/tasks.py
+++ b/tasks.py
@@ -35,6 +35,17 @@ SigAuth = HTTPSigAuth(KEY)
 back = activitypub.MicroblogPubBackend()
 ap.use_backend(back)
 
+
+def save_cb(box: Box, iri: str) -> None:
+    if box == Box.INBOX:
+        process_new_activity.delay(iri)
+    else:
+        cache_actor.delay(iri)
+
+
+back.set_save_cb(save_cb)
+
+
 MY_PERSON = ap.Person(**ME)
 
 
@@ -327,7 +338,7 @@ def finish_post_to_outbox(self, iri: str) -> None:
         activity = ap.fetch_remote_activity(iri)
         log.info(f"activity={activity!r}")
 
-        if activity.has_type(ap.activitytype.delete):
+        if activity.has_type(ap.ActivityType.DELETE):
             back.outbox_delete(MY_PERSON, activity)
         elif activity.has_type(ap.ActivityType.UPDATE):
             back.outbox_update(MY_PERSON, activity)
diff --git a/tests/federation_test.py b/tests/federation_test.py
index 20569bb..5ab8e51 100644
--- a/tests/federation_test.py
+++ b/tests/federation_test.py
@@ -19,7 +19,7 @@ class Instance(object):
     def __init__(self, name, host_url, docker_url=None):
         self.host_url = host_url
         self.docker_url = docker_url or host_url
-        self._create_delay = 12
+        self._create_delay = 20
         with open(
             os.path.join(
                 os.path.dirname(os.path.abspath(__file__)),