diff --git a/src/slack/monitor/events/interactions.test.ts b/src/slack/monitor/events/interactions.test.ts
index c5a1660ace..d4e6982d3f 100644
--- a/src/slack/monitor/events/interactions.test.ts
+++ b/src/slack/monitor/events/interactions.test.ts
@@ -229,6 +229,7 @@ describe("registerSlackInteractionEvents", () => {
   });
 
   it("ignores malformed action payloads after ack and logs warning", async () => {
+    enqueueSystemEventMock.mockReset();
     const { ctx, app, getHandler, runtimeLog } = createContext();
     registerSlackInteractionEvents({ ctx: ctx as never });
     const handler = getHandler();