diff --git a/components/app/__tests__/index.test.tsx b/components/app/__tests__/index.test.tsx
index 6000db19a2..cd785522ca 100644
--- a/components/app/__tests__/index.test.tsx
+++ b/components/app/__tests__/index.test.tsx
@@ -202,10 +202,12 @@ describe('App', () => {
 
       expect(container.querySelector('.anticon')).toBeTruthy();
       const dynamicStyles = Array.from(document.querySelectorAll('style[data-css-hash]'));
+      // Self-contained .anticon style
+      const regex = /(?:^|\})\s*\.anticon\s*{[^}]*}/;
       expect(
         dynamicStyles.some((style) => {
           const { innerHTML } = style;
-          return innerHTML.startsWith('.anticon');
+          return regex.test(innerHTML);
         }),
       ).toBeTruthy();
     });