diff --git a/nova/rpc.py b/nova/rpc.py
index 7a89ca8d..210d3ccc 100644
--- a/nova/rpc.py
+++ b/nova/rpc.py
@@ -250,7 +250,6 @@ def call(topic, msg):
     msg_id = uuid.uuid4().hex
     msg.update({'_msg_id': msg_id})
     LOG.debug("MSG_ID is %s" % (msg_id))
-
     conn = Connection.instance()
     d = defer.Deferred()
     consumer = DirectConsumer(connection=conn, msg_id=msg_id)
diff --git a/nova/tests/cloud_unittest.py b/nova/tests/cloud_unittest.py
index 0add5393..893717fe 100644
--- a/nova/tests/cloud_unittest.py
+++ b/nova/tests/cloud_unittest.py
@@ -52,7 +52,7 @@ class CloudTestCase(test.TrialTestCase):
         self.compute_consumer = rpc.AdapterConsumer(connection=self.conn,
                                                     topic=FLAGS.compute_topic,
                                                     proxy=self.compute)
-        self.injected.append(self.compute_consumer.attach_to_twisted())
+        self.compute_consumer.attach_to_twisted()
 
         try:
             manager.AuthManager().create_user('admin', 'admin', 'admin')
diff --git a/nova/tests/rpc_unittest.py b/nova/tests/rpc_unittest.py
index e1196798..1bb2405c 100644
--- a/nova/tests/rpc_unittest.py
+++ b/nova/tests/rpc_unittest.py
@@ -39,8 +39,7 @@ class RpcTestCase(test.TrialTestCase):
         self.consumer = rpc.AdapterConsumer(connection=self.conn,
                                             topic='test',
                                             proxy=self.receiver)
-
-        self.injected.append(self.consumer.attach_to_twisted())
+        self.consumer.attach_to_twisted()
 
     def test_call_succeed(self):
         """Get a value through rpc call"""