diff --git a/src/agents/pi-embedded-subscribe.tools.extract.test.ts b/src/agents/pi-embedded-subscribe.tools.extract.test.ts
index b0c22b91f47..86ec98e417c 100644
--- a/src/agents/pi-embedded-subscribe.tools.extract.test.ts
+++ b/src/agents/pi-embedded-subscribe.tools.extract.test.ts
@@ -46,7 +46,7 @@ describe("extractMessagingToolSend", () => {
 
     expect(result?.tool).toBe("message");
     expect(result?.provider).toBe("slack");
-    expect(result?.to).toBe("channel:C1");
+    expect(result?.to).toBe("channel:c1");
   });
 
   it("accepts target alias when to is omitted", () => {