diff --git a/components/_util/wave.jsx b/components/_util/wave.jsx
index ac262e156..396d5d5bc 100644
--- a/components/_util/wave.jsx
+++ b/components/_util/wave.jsx
@@ -117,7 +117,7 @@ export default {
     },
 
     resetEffect (node) {
-      if (!node || node === this.extraNode) {
+      if (!node || node === this.extraNode || !(node instanceof Element)) {
         return
       }
       const { insertExtraNode } = this.$props
diff --git a/components/affix/index.jsx b/components/affix/index.jsx
index a9fb0b25b..56df9af4f 100644
--- a/components/affix/index.jsx
+++ b/components/affix/index.jsx
@@ -83,6 +83,8 @@ const Affix = {
     // Wait for parent component ref has its value
     this.timeout = setTimeout(() => {
       this.setTargetEventListeners(target)
+      // Mock Event object.
+      this.updatePosition({})
     })
   },
   watch: {
diff --git a/components/back-top/__tests__/index.test.js b/components/back-top/__tests__/index.test.js
index 803b7d5e6..caddee20f 100644
--- a/components/back-top/__tests__/index.test.js
+++ b/components/back-top/__tests__/index.test.js
@@ -2,15 +2,7 @@ import { mount } from '@vue/test-utils'
 import BackTop from '..'
 
 describe('BackTop', () => {
-  beforeAll(() => {
-    jest.useFakeTimers()
-  })
-
-  afterAll(() => {
-    jest.useRealTimers()
-  })
-
-  it('should scroll to top after click it', () => {
+  it('should scroll to top after click it', async () => {
     const wrapper = mount(BackTop, {
       propsData: {
         visibilityHeight: -1,
@@ -19,9 +11,9 @@ describe('BackTop', () => {
     document.documentElement.scrollTop = 400
     // trigger scroll manually
     wrapper.vm.handleScroll()
-    jest.runAllTimers()
+    await new Promise(resolve => setTimeout(resolve, 0))
     wrapper.find('.ant-back-top').trigger('click')
-    jest.runAllTimers()
+    await new Promise(resolve => setTimeout(resolve, 1000))
     expect(Math.abs(Math.round(document.documentElement.scrollTop))).toBe(0)
   })
 })
diff --git a/components/carousel/__tests__/index.test.js b/components/carousel/__tests__/index.test.js
index 03e17e5fb..d5a19c066 100644
--- a/components/carousel/__tests__/index.test.js
+++ b/components/carousel/__tests__/index.test.js
@@ -77,7 +77,7 @@ describe('Carousel', () => {
       sync: true,
     }
     const wrapper = mount(Carousel, props)
-    const onWindowResized = wrapper.vm.onWindowResized
+    const { onWindowResized } = wrapper.vm
     const spy = jest.spyOn(wrapper.vm.onWindowResized, 'cancel')
     const spy2 = jest.spyOn(window, 'removeEventListener')
     wrapper.destroy()