diff --git a/components/back-top/__tests__/index.test.js b/components/back-top/__tests__/index.test.js
index ebf35fa27810..62c8a6a66f84 100644
--- a/components/back-top/__tests__/index.test.js
+++ b/components/back-top/__tests__/index.test.js
@@ -3,23 +3,14 @@ import { mount } from 'enzyme';
 import BackTop from '..';
 
 describe('BackTop', () => {
-  beforeAll(() => {
-    jest.useFakeTimers();
-  });
-
-  afterAll(() => {
-    jest.useRealTimers();
-  });
-
   it('should scroll to top after click it', async () => {
     const wrapper = mount(<BackTop visibilityHeight={-1} />);
     document.documentElement.scrollTop = 400;
     // trigger scroll manually
     wrapper.instance().handleScroll();
-    jest.runAllTimers();
-    wrapper.find('.ant-back-top').simulate('click');
-    jest.runAllTimers();
     await new Promise(resolve => setTimeout(resolve, 0));
+    wrapper.find('.ant-back-top').simulate('click');
+    await new Promise(resolve => setTimeout(resolve, 1000));
     expect(Math.abs(Math.round(document.documentElement.scrollTop))).toBe(0);
   });
 });