diff --git a/playground/node/index.ts b/playground/node/index.ts
index 45f2a20..f1aff6f 100644
--- a/playground/node/index.ts
+++ b/playground/node/index.ts
@@ -6,6 +6,7 @@ const server = createServer((req, res) => {
 
   res.writeHead(200)
   res.end(`detect accpect-language: ${languages}`)
+  process.exit()
 })
 
 server.listen(8123)
diff --git a/playground/node/node.test.mjs b/playground/node/node.test.mjs
index 307e810..0413e4b 100644
--- a/playground/node/node.test.mjs
+++ b/playground/node/node.test.mjs
@@ -17,6 +17,15 @@ test('node integration test', async () => {
   const res = await fetch(req)
   await sleep(1000)
 
+  console.log(child.pid)
+
+  const cleanup = () => {
+    process.kill(child.pid)
+  }
+
+  process.on('SIGINT', cleanup)
+  process.on('SIGTERM', cleanup)
+  process.on('SIGQUIT', cleanup)
+
   assert.deepEqual('detect accpect-language: en-US,en,ja', await res.text())
-  child.kill('SIGINT')
 })