diff --git a/rust/examples/scanner.rs b/rust/examples/scanner.rs
index ec931b5c..3c328edb 100644
--- a/rust/examples/scanner.rs
+++ b/rust/examples/scanner.rs
@@ -70,9 +70,7 @@ async fn main() -> PyResult<()> {
             let mut seen_adv_cache = seen_adv_clone.lock().unwrap();
             let expiry_duration = time::Duration::from_secs(cli.dedup_expiry_secs);
 
-            let advs_from_addr = seen_adv_cache
-                .entry(addr_bytes)
-                .or_insert_with(collections::HashMap::new);
+            let advs_from_addr = seen_adv_cache.entry(addr_bytes).or_default();
             // we expect cache hits to be the norm, so we do a separate lookup to avoid cloning
             // on every lookup with entry()
             let show = if let Some(prev) = advs_from_addr.get_mut(&data_units) {
diff --git a/rust/src/cli/usb/mod.rs b/rust/src/cli/usb/mod.rs
index 7adbd75f..5cab29a3 100644
--- a/rust/src/cli/usb/mod.rs
+++ b/rust/src/cli/usb/mod.rs
@@ -143,10 +143,7 @@ pub(crate) fn probe(verbose: bool) -> anyhow::Result<()> {
         );
         if let Some(s) = serial {
             println!("{:26}{}", "  Serial:".green(), s);
-            device_serials_by_id
-                .entry(device_id)
-                .or_insert(HashSet::new())
-                .insert(s);
+            device_serials_by_id.entry(device_id).or_default().insert(s);
         }
         if let Some(m) = mfg {
             println!("{:26}{}", "  Manufacturer:".green(), m);
@@ -314,7 +311,7 @@ impl ClassInfo {
             self.protocol,
             self.protocol_name()
                 .map(|s| format!(" [{}]", s))
-                .unwrap_or_else(String::new)
+                .unwrap_or_default()
         )
     }
 }