diff --git a/testfile b/testfile
index 53d14ccca..3e7ee64d6 100644
--- a/testfile
+++ b/testfile
@@ -73,6 +73,7 @@ Can get rooms/{roomId}/members for a departed room (SPEC-216)
 3pid invite join valid signature but unreachable ID server are rejected
 Room members can override their displayname on a room-specific basis
 Room members can join a room with an overridden displayname
+displayname updates affect room member events
 avatar_url updates affect room member events
 Real non-joined user cannot call /events on shared room
 Real non-joined user cannot call /events on invited room