Update notifier.rst

Co-Authored-By: Denis Brumann <dbrumann@gmail.com>

Author: jschaedl

notifier.rst

@@ -561,7 +561,7 @@ Disabling Delivery
 
 While developing (or testing), you may want to disable delivery of notifications entirely.
 You can do this by forcing Notifier to use the ``NullTransport`` for all configured texter
-and chatter transports in only the ``dev`` environment:
+and chatter transports in only the ``dev`` (or respectively ``test``) environment:
 
 .. code-block:: yaml