diff --git a/packages/is/__test__/isEmptyString.test.ts b/packages/is/__test__/isEmptyString.test.ts
index 6e7891e..d1ae902 100644
--- a/packages/is/__test__/isEmptyString.test.ts
+++ b/packages/is/__test__/isEmptyString.test.ts
@@ -3,6 +3,8 @@ import { isEmptyString } from '../src/isEmptyString'
 
 describe('@xparcai-utils/is', () => {
   it('isEmptyString', () => {
-    expect(isEmptyString()).toBe(undefined)
+    expect(isEmptyString(1)).toBe(false)
+    // 这里的单测没有通过，预期应该是true，但得到了false
+    expect(isEmptyString('')).toBe(true)
   })
 })