diff --git a/src/gateway/server-methods/agent.create-event.test.ts b/src/gateway/server-methods/agent.create-event.test.ts
index d28c5005fbb..95f5a84c742 100644
--- a/src/gateway/server-methods/agent.create-event.test.ts
+++ b/src/gateway/server-methods/agent.create-event.test.ts
@@ -98,14 +98,16 @@ describe("agent handler session create events", () => {
       undefined,
       { runId: "idem-agent-create-event" },
     );
-    expect(broadcastToConnIds).toHaveBeenCalledWith(
-      "sessions.changed",
-      expect.objectContaining({
-        sessionKey: "agent:main:subagent:create-test",
-        reason: "create",
-      }),
-      new Set(["conn-1"]),
-      { dropIfSlow: true },
+    await vi.waitFor(() =>
+      expect(broadcastToConnIds).toHaveBeenCalledWith(
+        "sessions.changed",
+        expect.objectContaining({
+          sessionKey: "agent:main:subagent:create-test",
+          reason: "create",
+        }),
+        new Set(["conn-1"]),
+        { dropIfSlow: true },
+      ),
     );
   });
 });