diff --git a/virtio-devices/src/vsock/csm/txbuf.rs b/virtio-devices/src/vsock/csm/txbuf.rs
index d36e28fb7..83d4a8203 100644
--- a/virtio-devices/src/vsock/csm/txbuf.rs
+++ b/virtio-devices/src/vsock/csm/txbuf.rs
@@ -213,9 +213,7 @@ mod tests {
     fn test_push_wrap() {
         let mut txbuf = TxBuf::new();
         let mut sink = TestSink::new();
-        let mut tmp: Vec<u8> = Vec::new();
-
-        tmp.resize(TxBuf::SIZE - 2, 0);
+        let tmp: Vec<u8> = vec![0; TxBuf::SIZE - 2];
         txbuf.push(tmp.as_slice()).unwrap();
         txbuf.flush_to(&mut sink).unwrap();
         sink.clear();