diff --git a/extensions/discord/src/send.webhook-activity.test.ts b/extensions/discord/src/send.webhook-activity.test.ts
index 812132d3261..7f73255f44c 100644
--- a/extensions/discord/src/send.webhook-activity.test.ts
+++ b/extensions/discord/src/send.webhook-activity.test.ts
@@ -2,6 +2,7 @@ import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vite
 
 const recordChannelActivityMock = vi.hoisted(() => vi.fn());
 const loadConfigMock = vi.hoisted(() => vi.fn(() => ({ channels: { discord: {} } })));
+let dateNowSpy: ReturnType<typeof vi.spyOn>;
 
 vi.mock("openclaw/plugin-sdk/plugin-config-runtime", async () => {
   const actual = await vi.importActual<typeof import("openclaw/plugin-sdk/plugin-config-runtime")>(
@@ -33,6 +34,7 @@ describe("sendWebhookMessageDiscord activity", () => {
   beforeEach(() => {
     recordChannelActivityMock.mockClear();
     loadConfigMock.mockClear();
+    dateNowSpy = vi.spyOn(Date, "now").mockReturnValue(1_700_000_000_000);
     vi.stubGlobal(
       "fetch",
       vi.fn(async () => {
@@ -45,6 +47,7 @@ describe("sendWebhookMessageDiscord activity", () => {
   });
 
   afterEach(() => {
+    dateNowSpy.mockRestore();
     vi.unstubAllGlobals();
   });
 
@@ -67,10 +70,32 @@ describe("sendWebhookMessageDiscord activity", () => {
     expect(result).toMatchObject({
       messageId: "msg-1",
       channelId: "thread-1",
-      receipt: expect.objectContaining({
-        threadId: "thread-1",
-        platformMessageIds: ["msg-1"],
-      }),
+    });
+    expect(result.receipt).toEqual({
+      primaryPlatformMessageId: "msg-1",
+      platformMessageIds: ["msg-1"],
+      parts: [
+        {
+          platformMessageId: "msg-1",
+          kind: "text",
+          index: 0,
+          threadId: "thread-1",
+          raw: {
+            channel: "discord",
+            messageId: "msg-1",
+            channelId: "thread-1",
+          },
+        },
+      ],
+      threadId: "thread-1",
+      sentAt: 1_700_000_000_000,
+      raw: [
+        {
+          channel: "discord",
+          messageId: "msg-1",
+          channelId: "thread-1",
+        },
+      ],
     });
     expect(recordChannelActivityMock).toHaveBeenCalledWith({
       channel: "discord",
@@ -99,11 +124,19 @@ describe("sendWebhookMessageDiscord activity", () => {
       threadId: "thread-1",
     });
 
-    expect(fetch).toHaveBeenCalledWith(
+    const fetchMock = vi.mocked(fetch);
+    expect(fetchMock).toHaveBeenCalledTimes(1);
+    expect(fetchMock.mock.calls[0]).toEqual([
       "https://discord.com/api/v10/webhooks/wh-1/tok-1?wait=true&thread_id=thread-1",
-      expect.objectContaining({
-        body: expect.stringContaining('"content":"hello <@123456789012345678>"'),
-      }),
-    );
+      {
+        method: "POST",
+        headers: {
+          "content-type": "application/json",
+        },
+        body: JSON.stringify({
+          content: "hello <@123456789012345678>",
+        }),
+      },
+    ]);
   });
 });