diff --git a/extensions/synology-chat/src/client.test.ts b/extensions/synology-chat/src/client.test.ts
index 7d49bcb43f0..833ce755f78 100644
--- a/extensions/synology-chat/src/client.test.ts
+++ b/extensions/synology-chat/src/client.test.ts
@@ -158,22 +158,15 @@ describe("sendFileUrl", () => {
 });
 
 // Helper to mock the user_list API response for fetchChatUsers / resolveLegacyWebhookNameToChatUserId
-function mockUserListResponse(
-  users: Array<{ user_id: number; username: string; nickname: string }>,
-) {
+function mockUserListResponse(users: Array<Record<string, unknown>>) {
   mockUserListResponseImpl(users, false);
 }
 
-function mockUserListResponseOnce(
-  users: Array<{ user_id: number; username: string; nickname: string }>,
-) {
+function mockUserListResponseOnce(users: Array<Record<string, unknown>>) {
   mockUserListResponseImpl(users, true);
 }
 
-function mockUserListResponseImpl(
-  users: Array<{ user_id: number; username: string; nickname: string }>,
-  once: boolean,
-) {
+function mockUserListResponseImpl(users: Array<Record<string, unknown>>, once: boolean) {
   const httpsGet = vi.mocked(https.get);
   const impl: MockRequestHandler = (_url, _opts, callback) => {
     const res = createMockResponseEmitter(200);
@@ -298,29 +291,10 @@ describe("fetchChatUsers", () => {
   installFakeTimerHarness();
 
   it("filters malformed user entries while keeping valid ones", async () => {
-    const httpsGet = vi.mocked(https.get);
-    httpsGet.mockImplementation(((_url, _opts, callback) => {
-      const res = createMockResponseEmitter(200);
-      process.nextTick(() => {
-        callback?.(res);
-        res.emit(
-          "data",
-          Buffer.from(
-            JSON.stringify({
-              success: true,
-              data: {
-                users: [
-                  { user_id: 4, username: "jmn67", nickname: "jmn" },
-                  { user_id: "bad", username: "broken" },
-                ],
-              },
-            }),
-          ),
-        );
-        res.emit("end");
-      });
-      return createMockRequestEmitter();
-    }) as MockRequestHandler);
+    mockUserListResponse([
+      { user_id: 4, username: "jmn67", nickname: "jmn" },
+      { user_id: "bad", username: "broken" },
+    ]);
 
     const users = await fetchChatUsers(
       "https://nas.example.com/webapi/entry.cgi?api=SYNO.Chat.External&method=chatbot&version=2&token=%22test%22",
diff --git a/extensions/synology-chat/src/core.test.ts b/extensions/synology-chat/src/core.test.ts
index 54e9c913c90..3480b131104 100644
--- a/extensions/synology-chat/src/core.test.ts
+++ b/extensions/synology-chat/src/core.test.ts
@@ -33,6 +33,26 @@ const synologyChatSetupPlugin = {
 const synologyChatConfigure = createPluginSetupWizardConfigure(synologyChatSetupPlugin);
 const originalEnv = { ...process.env };
 
+function createSynologySetupPrompter(params: { allowedUserIds?: string } = {}) {
+  return createTestWizardPrompter({
+    text: vi.fn(async ({ message }: { message: string }) => {
+      if (message === "Enter Synology Chat outgoing webhook token") {
+        return "synology-token";
+      }
+      if (message === "Incoming webhook URL") {
+        return "https://nas.example.com/webapi/entry.cgi?token=incoming";
+      }
+      if (message === "Outgoing webhook path (optional)") {
+        return "";
+      }
+      if (params.allowedUserIds && message === "Allowed Synology Chat user ids") {
+        return params.allowedUserIds;
+      }
+      throw new Error(`Unexpected prompt: ${message}`);
+    }) as WizardPrompter["text"],
+  });
+}
+
 describe("synology-chat core", () => {
   beforeEach(() => {
     vi.unstubAllEnvs();
@@ -83,20 +103,7 @@ describe("synology-chat core", () => {
   });
 
   it("configures token and incoming webhook for the default account", async () => {
-    const prompter = createTestWizardPrompter({
-      text: vi.fn(async ({ message }: { message: string }) => {
-        if (message === "Enter Synology Chat outgoing webhook token") {
-          return "synology-token";
-        }
-        if (message === "Incoming webhook URL") {
-          return "https://nas.example.com/webapi/entry.cgi?token=incoming";
-        }
-        if (message === "Outgoing webhook path (optional)") {
-          return "";
-        }
-        throw new Error(`Unexpected prompt: ${message}`);
-      }) as WizardPrompter["text"],
-    });
+    const prompter = createSynologySetupPrompter();
 
     const result = await runSetupWizardConfigure({
       configure: synologyChatConfigure,
@@ -114,22 +121,8 @@ describe("synology-chat core", () => {
   });
 
   it("records allowed user ids when setup forces allowFrom", async () => {
-    const prompter = createTestWizardPrompter({
-      text: vi.fn(async ({ message }: { message: string }) => {
-        if (message === "Enter Synology Chat outgoing webhook token") {
-          return "synology-token";
-        }
-        if (message === "Incoming webhook URL") {
-          return "https://nas.example.com/webapi/entry.cgi?token=incoming";
-        }
-        if (message === "Outgoing webhook path (optional)") {
-          return "";
-        }
-        if (message === "Allowed Synology Chat user ids") {
-          return "123456, synology-chat:789012";
-        }
-        throw new Error(`Unexpected prompt: ${message}`);
-      }) as WizardPrompter["text"],
+    const prompter = createSynologySetupPrompter({
+      allowedUserIds: "123456, synology-chat:789012",
     });
 
     const result = await runSetupWizardConfigure({