diff --git a/resources/tester/cad/vitest.ui.config.ts b/resources/tester/cad/vitest.ui.config.ts
index 11ce23b73..9167d0899 100644
--- a/resources/tester/cad/vitest.ui.config.ts
+++ b/resources/tester/cad/vitest.ui.config.ts
@@ -1,5 +1,7 @@
 /** 페이지 코드(`@ui` 별칭을 쓰는 것)를 시험하는 vitest 설정 — 시험은 `ctrl-shortcut-sheet.test.ts`. */
-const root = new URL("../../..", import.meta.url).pathname.replace(/^\/(\w:)/, "$1");
+import { fileURLToPath } from "node:url";
+
+const root = fileURLToPath(new URL("../../..", import.meta.url)).replace(/\\/g, "/");
 
 export default {
   root,