diff --git a/sytest-blacklist b/sytest-blacklist
index 89c61c969..705c9ff4c 100644
--- a/sytest-blacklist
+++ b/sytest-blacklist
@@ -56,5 +56,8 @@ Inbound federation accepts a second soft-failed event
 # Caused by https://github.com/matrix-org/sytest/pull/911
 Outbound federation requests missing prev_events and then asks for /state_ids and resolves the state
 
+# We don't implement device lists yet
+Device list doesn't change if remote server is down
+
 # We don't implement lazy membership loading yet.
 The only membership state included in a gapped incremental sync is for senders in the timeline