diff --git a/packages/frontend/electron-api/src/index.ts b/packages/frontend/electron-api/src/index.ts
index 0f7ea8970d..e6cbc6d167 100644
--- a/packages/frontend/electron-api/src/index.ts
+++ b/packages/frontend/electron-api/src/index.ts
@@ -6,10 +6,7 @@ import type {
   events as mainEvents,
   handlers as mainHandlers,
 } from '@affine/electron/main/exposed';
-import type {
-  affine as exposedAffineGlobal,
-  appInfo as exposedAppInfo,
-} from '@affine/electron/preload/electron-api';
+import type { appInfo as exposedAppInfo } from '@affine/electron/preload/electron-api';
 import type { sharedStorage as exposedSharedStorage } from '@affine/electron/preload/shared-storage';
 
 type MainHandlers = typeof mainHandlers;
@@ -37,9 +34,7 @@ export const appInfo = (globalThis as any).appInfo as
   | null;
 export const apis = (globalThis as any).apis as ClientHandler | null;
 export const events = (globalThis as any).events as ClientEvents | null;
-export const affine = (globalThis as any).affine as
-  | typeof exposedAffineGlobal
-  | null;
+
 export const sharedStorage = (globalThis as any).sharedStorage as
   | typeof exposedSharedStorage
   | null;
diff --git a/packages/frontend/electron/src/preload/bootstrap.ts b/packages/frontend/electron/src/preload/bootstrap.ts
index 3df4e29ccc..6aa3bc8de1 100644
--- a/packages/frontend/electron/src/preload/bootstrap.ts
+++ b/packages/frontend/electron/src/preload/bootstrap.ts
@@ -1,6 +1,6 @@
 import { contextBridge } from 'electron';
 
-import { affine, appInfo, getElectronAPIs } from './electron-api';
+import { appInfo, getElectronAPIs } from './electron-api';
 import { sharedStorage } from './shared-storage';
 
 const { apis, events } = getElectronAPIs();
@@ -9,9 +9,3 @@ contextBridge.exposeInMainWorld('appInfo', appInfo);
 contextBridge.exposeInMainWorld('apis', apis);
 contextBridge.exposeInMainWorld('events', events);
 contextBridge.exposeInMainWorld('sharedStorage', sharedStorage);
-
-try {
-  contextBridge.exposeInMainWorld('affine', affine);
-} catch (error) {
-  console.error('Failed to expose affine APIs to window object!', error);
-}
diff --git a/packages/frontend/electron/src/preload/electron-api.ts b/packages/frontend/electron/src/preload/electron-api.ts
index ae6773155f..f36868ba9f 100644
--- a/packages/frontend/electron/src/preload/electron-api.ts
+++ b/packages/frontend/electron/src/preload/electron-api.ts
@@ -11,42 +11,6 @@ import type {
   RendererToHelper,
 } from '../shared/type';
 
-export const affine = {
-  ipcRenderer: {
-    send(channel: string, ...args: any[]) {
-      ipcRenderer.send(channel, ...args);
-    },
-
-    invoke(channel: string, ...args: any[]) {
-      return ipcRenderer.invoke(channel, ...args);
-    },
-
-    on(
-      channel: string,
-      listener: (event: Electron.IpcRendererEvent, ...args: any[]) => void
-    ) {
-      ipcRenderer.on(channel, listener);
-      return this;
-    },
-
-    once(
-      channel: string,
-      listener: (event: Electron.IpcRendererEvent, ...args: any[]) => void
-    ) {
-      ipcRenderer.once(channel, listener);
-      return this;
-    },
-
-    removeListener(
-      channel: string,
-      listener: (event: Electron.IpcRendererEvent, ...args: any[]) => void
-    ) {
-      ipcRenderer.removeListener(channel, listener);
-      return this;
-    },
-  },
-};
-
 export function getElectronAPIs() {
   const mainAPIs = getMainAPIs();
   const helperAPIs = getHelperAPIs();
diff --git a/tests/affine-desktop/e2e/behavior.spec.ts b/tests/affine-desktop/e2e/behavior.spec.ts
deleted file mode 100644
index 7231b5a543..0000000000
--- a/tests/affine-desktop/e2e/behavior.spec.ts
+++ /dev/null
@@ -1,38 +0,0 @@
-import os from 'node:os';
-
-import { test } from '@affine-test/kit/electron';
-import { shouldCallIpcRendererHandler } from '@affine-test/kit/utils/ipc';
-
-test.describe.skip('behavior test', () => {
-  if (os.platform() === 'darwin') {
-    test('system button should hidden correctly', async ({
-      page,
-      electronApp,
-    }) => {
-      {
-        const promise = shouldCallIpcRendererHandler(
-          electronApp,
-          'ui:handleSidebarVisibilityChange'
-        );
-        await page
-          .locator(
-            '[data-testid=app-sidebar-arrow-button-collapse][data-show=true]'
-          )
-          .click();
-        await promise;
-      }
-      {
-        const promise = shouldCallIpcRendererHandler(
-          electronApp,
-          'ui:handleSidebarVisibilityChange'
-        );
-        await page
-          .locator(
-            '[data-testid=app-sidebar-arrow-button-expand][data-show=true]'
-          )
-          .click();
-        await promise;
-      }
-    });
-  }
-});
diff --git a/tests/kit/utils/ipc.ts b/tests/kit/utils/ipc.ts
deleted file mode 100644
index e5f5544694..0000000000
--- a/tests/kit/utils/ipc.ts
+++ /dev/null
@@ -1,64 +0,0 @@
-// TODO(@pengx17): remove
-
-import type { affine } from '@affine/electron-api';
-// Credit: https://github.com/spaceagetv/electron-playwright-helpers/blob/main/src/ipc_helpers.ts
-import type { Page } from '@playwright/test';
-import type { ElectronApplication } from 'playwright';
-
-declare global {
-  interface Window {
-    affine: typeof affine;
-  }
-}
-
-export function ipcRendererInvoke(page: Page, channel: string, ...args: any[]) {
-  return page.evaluate(
-    ({ channel, args }) => {
-      return window.affine?.ipcRenderer.invoke(channel, ...args);
-    },
-    { channel, args }
-  );
-}
-
-export function ipcRendererSend(page: Page, channel: string, ...args: any[]) {
-  return page.evaluate(
-    ({ channel, args }) => {
-      window.affine?.ipcRenderer.send(channel, ...args);
-    },
-    { channel, args }
-  );
-}
-
-type IpcMainWithHandlers = Electron.IpcMain & {
-  _invokeHandlers: Map<
-    string,
-    (e: Electron.IpcMainInvokeEvent, ...args: unknown[]) => Promise<unknown>
-  >;
-};
-
-export function shouldCallIpcRendererHandler(
-  electronApp: ElectronApplication,
-  channel: string
-) {
-  return electronApp.evaluate(
-    async ({ ipcMain }, { channel }) => {
-      const ipcMainWH = ipcMain as IpcMainWithHandlers;
-      // this is all a bit of a hack, so let's test as we go
-      if (!ipcMainWH._invokeHandlers) {
-        throw new Error(`Cannot access ipcMain._invokeHandlers`);
-      }
-      const handler = ipcMainWH._invokeHandlers.get(channel);
-      if (!handler) {
-        throw new Error(`No ipcMain handler registered for '${channel}'`);
-      }
-      return new Promise<void>(resolve => {
-        ipcMainWH._invokeHandlers.set(channel, async (e, ...args) => {
-          ipcMainWH._invokeHandlers.set(channel, handler);
-          resolve();
-          return handler(e, ...args);
-        });
-      });
-    },
-    { channel }
-  );
-}