diff --git a/sytest-blacklist b/sytest-blacklist
index 11841204c..89c61c969 100644
--- a/sytest-blacklist
+++ b/sytest-blacklist
@@ -52,5 +52,9 @@ Remote invited user can see room metadata
 # this test thinks it's all fine...
 Inbound federation accepts a second soft-failed event
 
+# Relies on a rejected PL event which will never be accepted into the DAG
+# 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 lazy membership loading yet.
 The only membership state included in a gapped incremental sync is for senders in the timeline
diff --git a/sytest-whitelist b/sytest-whitelist
index ad7a67f6d..d385d9b0a 100644
--- a/sytest-whitelist
+++ b/sytest-whitelist
@@ -280,7 +280,6 @@ Inbound federation of state requires event_id as a mandatory paramater
 Inbound federation can get state_ids for a room
 Inbound federation of state_ids requires event_id as a mandatory paramater
 Federation rejects inbound events where the prev_events cannot be found
-Outbound federation requests missing prev_events and then asks for /state_ids and resolves the state
 Alternative server names do not cause a routing loop
 Events whose auth_events are in the wrong room do not mess up the room state
 Inbound federation can return events