diff --git a/src/bin/proxmox-backup-client.rs b/src/bin/proxmox-backup-client.rs
index b5677cdb..2297d302 100644
--- a/src/bin/proxmox-backup-client.rs
+++ b/src/bin/proxmox-backup-client.rs
@@ -1466,7 +1466,7 @@ async fn prune_async(mut param: Value) -> Result<Value, Error> {
     if quiet {
         let list: Vec<Value> = data.as_array().unwrap().iter().filter(|item| {
             item["keep"].as_bool() == Some(false)
-        }).map(|v| v.clone()).collect();
+        }).cloned().collect();
         data = list.into();
     }
 
diff --git a/src/tape/inventory.rs b/src/tape/inventory.rs
index 17832c21..289ef510 100644
--- a/src/tape/inventory.rs
+++ b/src/tape/inventory.rs
@@ -300,7 +300,7 @@ impl Inventory {
     }
 
     pub fn media_set_start_time(&self, media_set_uuid: &Uuid) -> Option<i64> {
-        self.media_set_start_times.get(media_set_uuid).map(|t| *t)
+        self.media_set_start_times.get(media_set_uuid).copied()
     }
 
     /// Lookup media set pool
diff --git a/src/tape/media_catalog.rs b/src/tape/media_catalog.rs
index a3dd04db..d9cdf0ae 100644
--- a/src/tape/media_catalog.rs
+++ b/src/tape/media_catalog.rs
@@ -323,7 +323,7 @@ impl MediaCatalog {
 
     /// Returns the chunk archive file number
     pub fn lookup_snapshot(&self, snapshot: &str) -> Option<u64> {
-        self.snapshot_index.get(snapshot).map(|n| *n)
+        self.snapshot_index.get(snapshot).copied()
     }
 
     /// Test if the catalog already contain a chunk
@@ -333,7 +333,7 @@ impl MediaCatalog {
 
     /// Returns the chunk archive file number
     pub fn lookup_chunk(&self, digest: &[u8;32]) -> Option<u64> {
-        self.chunk_index.get(digest).map(|n| *n)
+        self.chunk_index.get(digest).copied()
     }
 
     fn check_register_label(&self, file_number: u64) -> Result<(), Error> {