diff --git a/legacy/packages/core/src/_utils.ts b/legacy/packages/core/src/_utils.ts
index 43d2605a..5330df4e 100644
--- a/legacy/packages/core/src/_utils.ts
+++ b/legacy/packages/core/src/_utils.ts
@@ -1,3 +1,5 @@
+// testing utils
+
 import defaultKy, {
   type AfterResponseHook,
   type BeforeRequestHook,