diff --git a/src/useDebounceFn.ts b/src/useDebounceFn.ts
index 08c8288..953a550 100644
--- a/src/useDebounceFn.ts
+++ b/src/useDebounceFn.ts
@@ -1,13 +1,15 @@
 import { watch } from 'vue'
 import { useDebounce } from './useDebounce'
 
-export function useDebounceFn(fn: Function, delay = 200) {
+export function useDebounceFn<T extends (...rest: any[]) => any>(fn: T, delay = 200) {
   const debounceValue = useDebounce(0, delay)
+  let params: Parameters<T>
 
   watch(debounceValue, () => {
-    fn()
+    fn(...params)
   })
-  return () => {
+  return (...rest: Parameters<T>) => {
+    params = rest
     debounceValue.value++
   }
 }
diff --git a/tests/useDebounceFn.test.ts b/tests/useDebounceFn.test.ts
index b67956f..c812fde 100644
--- a/tests/useDebounceFn.test.ts
+++ b/tests/useDebounceFn.test.ts
@@ -1,11 +1,13 @@
 import { nextTick } from 'vue'
 import { useDebounceFn } from '../src/useDebounceFn'
 
-let callback: Function | null
+let callback: (...rest: any[]) => any
 
 beforeEach(() => {
   jest.useFakeTimers()
-  callback = jest.fn()
+  callback = jest.fn((s: string) => {
+    console.log(s)
+  })
 })
 
 afterEach(() => {
@@ -36,8 +38,10 @@ test('timer should be cleared when calling the function returned by useDebounceF
 
 test('callback should be called when timeout', async () => {
   const debounceFn = useDebounceFn(callback!)
-  debounceFn()
+  debounceFn('1')
+  debounceFn('2')
   jest.advanceTimersByTime(200)
   await nextTick()
   expect(callback!).toHaveBeenCalledTimes(1)
+  expect(callback!).toHaveBeenCalledWith('2')
 })
diff --git a/tests/useInterval.test.ts b/tests/useInterval.test.ts
index e37a3bf..f7dd31d 100644
--- a/tests/useInterval.test.ts
+++ b/tests/useInterval.test.ts
@@ -55,7 +55,7 @@ test('interval will be start after invoking start', () => {
   clear!()
   expect(clearInterval).toHaveBeenCalledTimes(1)
   expect(clearInterval).toHaveBeenCalledWith(expect.any(Number))
-  start()
+  start!()
   expect(setInterval).toHaveBeenCalled()
   expect(setInterval).toHaveBeenCalledWith(expect.any(Function), 500)
   jest.advanceTimersByTime(500)