diff --git a/test/utils/permalinks/Permalinks-test.js b/test/utils/permalinks/Permalinks-test.js
index 72cd66cb69..0bd4466d97 100644
--- a/test/utils/permalinks/Permalinks-test.js
+++ b/test/utils/permalinks/Permalinks-test.js
@@ -34,6 +34,7 @@ function mockRoom(roomId, members, serverACL) {
 
     return {
         roomId,
+        getCanonicalAlias: () => roomId,
         getJoinedMembers: () => members,
         getMember: (userId) => members.find(m => m.userId === userId),
         currentState: {