diff --git a/playground/lib/__tests__/lib.spec.ts b/playground/lib/__tests__/lib.spec.ts
index 54a7613d04cdce..0f9b837aab2b3f 100644
--- a/playground/lib/__tests__/lib.spec.ts
+++ b/playground/lib/__tests__/lib.spec.ts
@@ -24,7 +24,7 @@ describe.runIf(isBuild)('build', () => {
     expect(await page.textContent('.iife')).toBe('It works')
     const code = readFile('dist/my-lib-custom-filename.iife.js')
     // esbuild helpers are injected inside of the IIFE wrapper
-    expect(code).toMatch(/^const MyLib=function\(\){"use strict";/)
+    expect(code).toMatch(/^var MyLib=function\(\){"use strict";/)
   })
 
   test('Library mode does not include `preload`', async () => {