diff --git a/sytest-blacklist b/sytest-blacklist
index dd5e2cd5..4c36e477 100644
--- a/sytest-blacklist
+++ b/sytest-blacklist
@@ -7,6 +7,9 @@ POST /login can log in as a user with just the local part of the id
 # Blacklisted due to flakiness
 avatar_url updates affect room member events
 
+# Blacklisted due to flakiness
+displayname updates affect room member events
+
 # Blacklisted due to flakiness
 Room members can override their displayname on a room-specific basis
 
diff --git a/sytest-whitelist b/sytest-whitelist
index b6741ff2..0600e2e5 100644
--- a/sytest-whitelist
+++ b/sytest-whitelist
@@ -67,7 +67,6 @@ Can get rooms/{roomId}/members for a departed room (SPEC-216)
 3pid invite join valid signature but revoked keys are rejected
 3pid invite join valid signature but unreachable ID server are rejected
 Room members can join a room with an overridden displayname
-displayname 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
 Real non-joined user cannot call /events on joined room