diff --git a/docs/source/tutorial.ipynb b/docs/source/tutorial.ipynb
index fe25892d..af1ed795 100644
--- a/docs/source/tutorial.ipynb
+++ b/docs/source/tutorial.ipynb
@@ -281,7 +281,7 @@
     "    def continue_fn(self):\n",
     "        print('continuing')\n",
     "        # message is stored in the process status\n",
-    "        return plumpy.Kill('I was killed')\n",
+    "        return plumpy.Kill(plumpy.KillMessage.build('I was killed'))\n",
     "\n",
     "\n",
     "process = ContinueProcess()\n",
diff --git a/src/plumpy/process_comms.py b/src/plumpy/process_comms.py
index 5727bdae..cd6e7238 100644
--- a/src/plumpy/process_comms.py
+++ b/src/plumpy/process_comms.py
@@ -46,10 +46,6 @@ class Intent:
 
 MessageType = Dict[str, Any]
 
-# PAUSE_MSG: MessageType = {INTENT_KEY: Intent.PAUSE, MESSAGE_KEY: None}
-# PLAY_MSG: MessageType = {INTENT_KEY: Intent.PLAY, MESSAGE_KEY: None}
-# STATUS_MSG: MessageType = {INTENT_KEY: Intent.STATUS, MESSAGE_KEY: None}
-
 
 class PlayMessage:
     @classmethod