diff --git a/src/agents/pi-tool-definition-adapter.after-tool-call.fires-once.test.ts b/src/agents/pi-tool-definition-adapter.after-tool-call.fires-once.test.ts
index a4f01fc79f1..276a8716c03 100644
--- a/src/agents/pi-tool-definition-adapter.after-tool-call.fires-once.test.ts
+++ b/src/agents/pi-tool-definition-adapter.after-tool-call.fires-once.test.ts
@@ -84,6 +84,7 @@ async function loadFreshAfterToolCallModulesForTest() {
     getGlobalHookRunner: () => hookMocks.runner,
   }));
   vi.doMock("../infra/agent-events.js", () => ({
+    emitAgentCommandOutputEvent: vi.fn(),
     emitAgentEvent: vi.fn(),
     emitAgentItemEvent: vi.fn(),
   }));