diff --git a/src/bin/proxmox-backup-client.rs b/src/bin/proxmox-backup-client.rs
index d91f04cc..2cd00c2e 100644
--- a/src/bin/proxmox-backup-client.rs
+++ b/src/bin/proxmox-backup-client.rs
@@ -305,7 +305,7 @@ async fn backup_directory<P: AsRef<Path>>(
     )?;
     let mut chunk_stream = ChunkStream::new(pxar_stream, chunk_size);
 
-    let (mut tx, rx) = mpsc::channel(10); // allow to buffer 10 chunks
+    let (tx, rx) = mpsc::channel(10); // allow to buffer 10 chunks
 
     let stream = ReceiverStream::new(rx)
         .map_err(Error::from);
diff --git a/src/bin/proxmox-backup-proxy.rs b/src/bin/proxmox-backup-proxy.rs
index c8eb237c..39e8d537 100644
--- a/src/bin/proxmox-backup-proxy.rs
+++ b/src/bin/proxmox-backup-proxy.rs
@@ -164,7 +164,7 @@ async fn run() -> Result<(), Error> {
 }
 
 fn accept_connections(
-    mut listener: tokio::net::TcpListener,
+    listener: tokio::net::TcpListener,
     acceptor: Arc<openssl::ssl::SslAcceptor>,
     debug: bool,
 ) -> tokio::sync::mpsc::Receiver<Result<std::pin::Pin<Box<tokio_openssl::SslStream<tokio::net::TcpStream>>>, Error>> {
diff --git a/src/bin/proxmox_backup_client/mount.rs b/src/bin/proxmox_backup_client/mount.rs
index 204ed7fc..f8410709 100644
--- a/src/bin/proxmox_backup_client/mount.rs
+++ b/src/bin/proxmox_backup_client/mount.rs
@@ -294,7 +294,7 @@ async fn mount_do(param: Value, pipe: Option<Fd>) -> Result<Value, Error> {
 
         // poll until loop file is mapped (or errors)
         select! {
-            res = session_fut => {
+            _res = session_fut => {
                 bail!("FUSE session unexpectedly ended before loop file mapping");
             },
             res = st_recv.try_next() => {
diff --git a/src/client/backup_writer.rs b/src/client/backup_writer.rs
index bcbd6f28..e7a6d6bd 100644
--- a/src/client/backup_writer.rs
+++ b/src/client/backup_writer.rs
@@ -583,6 +583,7 @@ impl BackupWriter {
             })
             .merge_known_chunks()
             .try_for_each(move |merged_chunk_info| {
+                let upload_queue = upload_queue.clone();
 
                 if let MergedChunkInfo::New(chunk_info) = merged_chunk_info {
                     let offset = chunk_info.offset;
@@ -610,7 +611,6 @@ impl BackupWriter {
 
                     let new_info = MergedChunkInfo::Known(vec![(offset, digest)]);
 
-                    let mut upload_queue = upload_queue.clone();
                     future::Either::Left(h2
                         .send_request(request, upload_data)
                         .and_then(move |response| async move {
@@ -621,7 +621,6 @@ impl BackupWriter {
                         })
                     )
                 } else {
-                    let mut upload_queue = upload_queue.clone();
                     future::Either::Right(async move {
                         upload_queue
                             .send((merged_chunk_info, None))
@@ -673,8 +672,6 @@ impl BackupWriter {
                 break;
             }
 
-            let mut upload_queue = upload_queue.clone();
-
             if verbose { eprintln!("send test data ({} bytes)", data.len()); }
             let request = H2Client::request_builder("localhost", "POST", "speedtest", None, None).unwrap();
             let request_future = self.h2.send_request(request, Some(bytes::Bytes::from(data.clone()))).await?;
diff --git a/src/server/command_socket.rs b/src/server/command_socket.rs
index 08e59173..84d4e9fe 100644
--- a/src/server/command_socket.rs
+++ b/src/server/command_socket.rs
@@ -21,7 +21,7 @@ where
     let backup_user = crate::backup::backup_user()?;
     let backup_gid = backup_user.gid.as_raw();
 
-    let mut socket = UnixListener::bind(&path)?;
+    let socket = UnixListener::bind(&path)?;
 
     let func = Arc::new(func);
 
diff --git a/src/tools/async_channel_writer.rs b/src/tools/async_channel_writer.rs
index 4bb56ac5..f48bd555 100644
--- a/src/tools/async_channel_writer.rs
+++ b/src/tools/async_channel_writer.rs
@@ -58,7 +58,7 @@ impl AsyncChannelWriter {
                         }
                     }
 
-                    let mut sender = match self.sender.take() {
+                    let sender = match self.sender.take() {
                         Some(sender) => sender,
                         None => return Poll::Ready(Err(io_err_other("no sender"))),
                     };
diff --git a/src/tools/broadcast_future.rs b/src/tools/broadcast_future.rs
index 1c82bdc3..3c96d2dc 100644
--- a/src/tools/broadcast_future.rs
+++ b/src/tools/broadcast_future.rs
@@ -159,7 +159,7 @@ fn test_broadcast_future() {
         .map_err(|err| { panic!("got error {}", err); })
         .map(|_| ());
 
-    let mut rt = tokio::runtime::Runtime::new().unwrap();
+    let rt = tokio::runtime::Runtime::new().unwrap();
     rt.block_on(async move {
         let r1 = tokio::spawn(receiver1);
         let r2 = tokio::spawn(receiver2);
diff --git a/tests/worker-task-abort.rs b/tests/worker-task-abort.rs
index 5b73c8b9..7ec3958c 100644
--- a/tests/worker-task-abort.rs
+++ b/tests/worker-task-abort.rs
@@ -39,7 +39,7 @@ fn worker_task_abort() -> Result<(), Error> {
     let errmsg: Arc<Mutex<Option<String>>> = Arc::new(Mutex::new(None));
     let errmsg1 = errmsg.clone();
 
-    let mut rt = tokio::runtime::Runtime::new().unwrap();
+    let rt = tokio::runtime::Runtime::new().unwrap();
     rt.block_on(async move {
 
         let mut commando_sock = server::CommandoSocket::new(server::our_ctrl_sock());