diff --git a/packages/avatar/__tests__/avatar.spec.ts b/packages/avatar/__tests__/avatar.spec.ts
index 96843c595c..814d096cfd 100644
--- a/packages/avatar/__tests__/avatar.spec.ts
+++ b/packages/avatar/__tests__/avatar.spec.ts
@@ -4,7 +4,7 @@ import Avatar from '../src/index.vue'
 import { IMAGE_SUCCESS, IMAGE_FAIL, mockImageEvent } from '@element-plus/test-utils'
 
 describe('Avatar.vue', () => {
-  beforeAll(mockImageEvent)
+  mockImageEvent()
 
   test('render test', () => {
     const wrapper = mount(Avatar)
diff --git a/packages/image/__tests__/image.spec.ts b/packages/image/__tests__/image.spec.ts
index 5c4be24e7e..d035ab51bd 100644
--- a/packages/image/__tests__/image.spec.ts
+++ b/packages/image/__tests__/image.spec.ts
@@ -12,7 +12,7 @@ async function doubleWait() {
 }
 
 describe('Image.vue', () => {
-  beforeAll(mockImageEvent)
+  mockImageEvent()
 
   test('render test', () => {
     const wrapper = mount(Image)
diff --git a/packages/test-utils/mock.ts b/packages/test-utils/mock.ts
index 0be600c25d..167932a096 100644
--- a/packages/test-utils/mock.ts
+++ b/packages/test-utils/mock.ts
@@ -5,12 +5,19 @@ export const IMAGE_SUCCESS = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAA
 export const IMAGE_FAIL = 'data:image/png;base64,fail'
 
 export function mockImageEvent() {
-  Object.defineProperty(global.Image.prototype, 'src', {
-    set(src) {
-      const evt = !src || src === IMAGE_FAIL
-        ? 'error' : 'load'
-      const event = new Event(evt)
-      nextTick(() => this.dispatchEvent(event))
-    },
+  const imageProto = global.Image.prototype
+  const oldDescriptor = Object.getOwnPropertyDescriptor(imageProto, 'src')
+  beforeAll(() => {
+    Object.defineProperty(imageProto, 'src', {
+      set(src) {
+        const evt = !src || src === IMAGE_FAIL
+          ? 'error' : 'load'
+        const event = new Event(evt)
+        nextTick(() => this.dispatchEvent(event))
+      },
+    })
+  })
+  afterAll(() => {
+    Object.defineProperty(imageProto, 'src', oldDescriptor)
   })
 }