diff --git a/extensions/slack/src/monitor.test.ts b/extensions/slack/src/monitor.test.ts
index c0716791132..eaf5a55ce2b 100644
--- a/extensions/slack/src/monitor.test.ts
+++ b/extensions/slack/src/monitor.test.ts
@@ -68,6 +68,7 @@ describe("resolveSlackThreadTs", () => {
             incomingThreadTs: threadTs,
             messageTs,
             hasReplied,
+            isThreadReply: true,
           }),
         ).toBe(threadTs);
       }