diff --git a/packages/fighting-design/_utils/type/__test__/utils.spec.ts b/packages/fighting-design/_utils/type/__test__/utils.spec.ts
new file mode 100644
index 0000000000..13d72bbe1c
--- /dev/null
+++ b/packages/fighting-design/_utils/type/__test__/utils.spec.ts
@@ -0,0 +1,16 @@
+import { expect, test } from 'vitest'
+import { toString } from '..'
+
+test('toString', () => {
+  expect(toString(1)).toBe('[object Number]')
+  expect(toString('1')).toBe('[object String]')
+  expect(toString(true)).toBe('[object Boolean]')
+  expect(toString([])).toBe('[object Array]')
+  expect(toString({})).toBe('[object Object]')
+  expect(toString((): number => 1)).toBe('[object Function]')
+  expect(toString(new Date)).toBe('[object Date]')
+  expect(toString(Symbol(1))).toBe('[object Symbol]')
+  expect(toString(null)).toBe('[object Null]')
+  expect(toString(undefined)).toBe('[object Undefined]')
+  expect(toString(NaN)).toBe('[object Number]')
+})