diff --git a/src/discord/monitor.slash.test.ts b/src/discord/monitor.slash.test.ts
index e4415d570a..409f557a58 100644
--- a/src/discord/monitor.slash.test.ts
+++ b/src/discord/monitor.slash.test.ts
@@ -18,6 +18,7 @@ vi.mock("@buape/carbon", () => ({
   MessageReactionRemoveListener: class {},
   PresenceUpdateListener: class {},
   Row: class {},
+  StringSelectMenu: class {},
 }));
 
 vi.mock("../auto-reply/dispatch.js", async (importOriginal) => {