diff --git a/extensions/slack/src/outbound-payload.test.ts b/extensions/slack/src/outbound-payload.test.ts
index c7616e577dd..a7be248ca44 100644
--- a/extensions/slack/src/outbound-payload.test.ts
+++ b/extensions/slack/src/outbound-payload.test.ts
@@ -1,6 +1,6 @@
 import type { ReplyPayload } from "openclaw/plugin-sdk/reply-runtime";
-import { createSlackOutboundPayloadHarness } from "openclaw/plugin-sdk/testing";
 import { describe, expect, it } from "vitest";
+import { createSlackOutboundPayloadHarness } from "../../../src/channels/plugins/contracts/suites.js";
 
 function createHarness(params: {
   payload: ReplyPayload;