diff --git a/sytest-whitelist b/sytest-whitelist
index a811259fb..3765365e4 100644
--- a/sytest-whitelist
+++ b/sytest-whitelist
@@ -477,4 +477,5 @@ Inbound federation rejects invites which include invalid JSON for room version 6
 Inbound federation rejects invite rejections which include invalid JSON for room version 6
 GET /capabilities is present and well formed for registered user 
 m.room.history_visibility == "joined" allows/forbids appropriately for Guest users
-m.room.history_visibility == "joined" allows/forbids appropriately for Real users
\ No newline at end of file
+m.room.history_visibility == "joined" allows/forbids appropriately for Real users
+POST rejects invalid utf-8 in JSON