diff --git a/src/readme.test.ts b/src/readme.test.ts
index f06d4391..444e2350 100644
--- a/src/readme.test.ts
+++ b/src/readme.test.ts
@@ -48,7 +48,7 @@ test("readme", () => {
 	// console.log(obj);
 	// -> { foo: 'bar', set: Set(3) { 1, 2, 3 } }
 
-	type Obj = typeof obj;
+	type _Obj = typeof obj;
 	//   ^?
 	// type Obj = {
 	//     readonly foo: "bar";