diff --git a/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/modulePreloadPolyfill.spec.ts b/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/modulePreloadPolyfill.spec.ts
index 01ba77a6d50fd9..134e90f8d41eef 100644
--- a/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/modulePreloadPolyfill.spec.ts
+++ b/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/modulePreloadPolyfill.spec.ts
@@ -5,11 +5,8 @@ import type { ModuleFormat, RollupOutput } from 'rollup'
 import { build } from '../../../build'
 import { modulePreloadPolyfillId } from '../../../plugins/modulePreloadPolyfill'
 
-const __dirname = resolve(fileURLToPath(import.meta.url), '..')
-
 const buildProject = ({ format = 'es' as ModuleFormat } = {}) =>
   build({
-    root: resolve(__dirname, 'packages/build-project'),
     logLevel: 'silent',
     build: {
       write: false,
diff --git a/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/package/package.json b/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/package/package.json
deleted file mode 100644
index 3bd38889692875..00000000000000
--- a/packages/vite/src/node/__tests__/plugins/modulePreloadPolyfill/package/package.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "name": "modulepreload-polyfill-test",
-  "type": "module"
-}