diff --git a/components/affix/__tests__/Affix.test.js b/components/affix/__tests__/Affix.test.js
index ac642dda87f0ea5e5d8b538d676a972a92b4e7be..6cf8da688dda3598e06a3bb72b6e0a61f456d976 100644
--- a/components/affix/__tests__/Affix.test.js
+++ b/components/affix/__tests__/Affix.test.js
@@ -48,7 +48,7 @@ describe('Affix Render', () => {
   };
 
   const originGetBoundingClientRect = HTMLElement.prototype.getBoundingClientRect;
-  HTMLElement.prototype.getBoundingClientRect = function getRect() {
+  HTMLElement.prototype.getBoundingClientRect = function getBoundingClientRect() {
     return (
       classRect[this.className] || {
         top: 0,