diff --git a/spec/unit/matrixrtc/MatrixRTCSession.spec.ts b/spec/unit/matrixrtc/MatrixRTCSession.spec.ts
index 34db746c53e..2c40e9a2230 100644
--- a/spec/unit/matrixrtc/MatrixRTCSession.spec.ts
+++ b/spec/unit/matrixrtc/MatrixRTCSession.spec.ts
@@ -102,6 +102,8 @@ describe("MatrixRTCSession", () => {
             roomId: randomString(8),
             getLiveTimeline: jest.fn().mockReturnValue({
                 getState: jest.fn().mockReturnValue({
+                    on: jest.fn(),
+                    off: jest.fn(),
                     getStateEvents: (_type: string, _stateKey: string) => [
                         {
                             getType: jest.fn().mockReturnValue(EventType.GroupCallMemberPrefix),
@@ -124,6 +126,8 @@ describe("MatrixRTCSession", () => {
             roomId: randomString(8),
             getLiveTimeline: jest.fn().mockReturnValue({
                 getState: jest.fn().mockReturnValue({
+                    on: jest.fn(),
+                    off: jest.fn(),
                     getStateEvents: (_type: string, _stateKey: string) => [
                         {
                             getType: jest.fn().mockReturnValue(EventType.GroupCallMemberPrefix),
diff --git a/spec/unit/matrixrtc/mocks.ts b/spec/unit/matrixrtc/mocks.ts
index ac5d48a1363..84496e657da 100644
--- a/spec/unit/matrixrtc/mocks.ts
+++ b/spec/unit/matrixrtc/mocks.ts
@@ -24,8 +24,6 @@ export function makeMockRoom(memberships: CallMembershipData[], localAge: number
     const roomState = makeMockRoomState(memberships, roomId, localAge);
     return {
         roomId: roomId,
-        on: jest.fn(),
-        off: jest.fn(),
         hasMembershipState: jest.fn().mockReturnValue(true),
         getLiveTimeline: jest.fn().mockReturnValue({
             getState: jest.fn().mockReturnValue(roomState),
@@ -36,6 +34,8 @@ export function makeMockRoom(memberships: CallMembershipData[], localAge: number
 export function makeMockRoomState(memberships: CallMembershipData[], roomId: string, localAge: number | null = null) {
     const event = mockRTCEvent(memberships, roomId, localAge);
     return {
+        on: jest.fn(),
+        off: jest.fn(),
         getStateEvents: (_: string, stateKey: string) => {
             if (stateKey !== undefined) return event;
             return [event];