diff --git a/easytier/src/tunnel/mpsc.rs b/easytier/src/tunnel/mpsc.rs
index 663b7dc5..2e9962ba 100644
--- a/easytier/src/tunnel/mpsc.rs
+++ b/easytier/src/tunnel/mpsc.rs
@@ -303,7 +303,8 @@ mod tests {
             for i in 0..1000000 {
                 tokio::time::sleep(tokio::time::Duration::from_millis(50)).await;
                 let a = sink1
-                    .send_async(ZCPacket::new_with_payload("hello".as_bytes())).await;
+                    .send_async(ZCPacket::new_with_payload("hello".as_bytes()))
+                    .await;
                 if a.is_err() {
                     tracing::info!(?a, "t2 exit with err");
                     break;
@@ -322,7 +323,8 @@ mod tests {
             for i in 0..1000000 {
                 tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
                 let a = sink2
-                    .send_async(ZCPacket::new_with_payload("hello2".as_bytes())).await;
+                    .send_async(ZCPacket::new_with_payload("hello2".as_bytes()))
+                    .await;
                 if a.is_err() {
                     tracing::info!(?a, "t3 exit with err");
                     break;