diff --git a/test/test-utils.js b/test/test-utils.js
index 953693a820..bad3547133 100644
--- a/test/test-utils.js
+++ b/test/test-utils.js
@@ -234,6 +234,7 @@ export function mkStubRoom(roomId = null) {
         }),
         getMembersWithMembership: jest.fn().mockReturnValue([]),
         getJoinedMembers: jest.fn().mockReturnValue([]),
+        getMembers: jest.fn().mockReturnValue([]),
         getPendingEvents: () => [],
         getLiveTimeline: () => stubTimeline,
         getUnfilteredTimelineSet: () => null,