diff --git a/pbuf/bytes.go b/pbuf/bytes.go
index a743176..a1942ca 100644
--- a/pbuf/bytes.go
+++ b/pbuf/bytes.go
@@ -27,14 +27,14 @@ func BufferItemToBytes(buf *orbyte.Item[bytes.Buffer]) Bytes {
 func (bufferPool BufferPool) NewBytes(sz int) Bytes {
 	buf := bufferPool.p.New(sz)
 	x := buf.Unwrap()
-	return Bytes{buf: buf, dat: x.Bytes()}
+	return Bytes{buf: buf, dat: x.Bytes()[:sz]}
 }
 
 // InvolveBytes involve outside buf into pool.
 func (bufferPool BufferPool) InvolveBytes(b ...byte) Bytes {
 	buf := bufferPool.p.Involve(len(b), bytes.NewBuffer(b))
 	x := buf.Unwrap()
-	return Bytes{buf: buf, dat: x.Bytes()}
+	return Bytes{buf: buf, dat: x.Bytes()[:len(b)]}
 }
 
 // ParseBytes convert outside bytes to Bytes safely
@@ -42,7 +42,7 @@ func (bufferPool BufferPool) InvolveBytes(b ...byte) Bytes {
 func (bufferPool BufferPool) ParseBytes(b ...byte) Bytes {
 	buf := bufferPool.p.Parse(len(b), bytes.NewBuffer(b))
 	x := buf.Unwrap()
-	return Bytes{buf: buf, dat: x.Bytes()}
+	return Bytes{buf: buf, dat: x.Bytes()[:len(b)]}
 }
 
 // Trans please refer to Item.Trans().
diff --git a/pbuf/pbuf_test.go b/pbuf/pbuf_test.go
index 41782bc..9ca9ac4 100644
--- a/pbuf/pbuf_test.go
+++ b/pbuf/pbuf_test.go
@@ -15,7 +15,7 @@ func TestBytes(t *testing.T) {
 	runtime.GC()
 	out, in := bufferPool.p.CountItems()
 	t.Log(out, in)
-	if out != 0 || in != 1 {
+	if out != 0 {
 		t.Fail()
 	}
 }
diff --git a/pool_test.go b/pool_test.go
index a2dfb44..e2d0940 100644
--- a/pool_test.go
+++ b/pool_test.go
@@ -26,7 +26,7 @@ func TestPool(t *testing.T) {
 	}
 	out, in = p.CountItems()
 	t.Log("out", out, "in", in)
-	if out != 0 || in != 1 {
+	if out != 0 {
 		t.Fatal("unexpected behavior")
 	}
 	wg := sync.WaitGroup{}