diff --git a/spec/unit/crypto.spec.ts b/spec/unit/crypto.spec.ts
index 36a746078..4bb5b58ca 100644
--- a/spec/unit/crypto.spec.ts
+++ b/spec/unit/crypto.spec.ts
@@ -254,6 +254,7 @@ describe("Crypto", function () {
                 sendToDevice: jest.fn(),
                 getKeyBackupVersion: jest.fn(),
                 isGuest: jest.fn(),
+                emit: jest.fn(),
             } as unknown as MatrixClient;
             mockRoomList = {} as unknown as RoomList;