diff --git a/sytest-blacklist b/sytest-blacklist
index c1685c972..58c794998 100644
--- a/sytest-blacklist
+++ b/sytest-blacklist
@@ -6,3 +6,6 @@ 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
+Room members can override their displayname on a room-specific basis
diff --git a/sytest-whitelist b/sytest-whitelist
index 346116c9b..c7f4ff081 100644
--- a/sytest-whitelist
+++ b/sytest-whitelist
@@ -66,7 +66,6 @@ Can get rooms/{roomId}/members for a departed room (SPEC-216)
 3pid invite join with wrong but valid signature are rejected
 3pid invite join valid signature but revoked keys are rejected
 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
 Real non-joined user cannot call /events on shared room