diff --git a/examples/metrics/src/main.rs b/examples/metrics/src/main.rs
index 2178de98..4dede131 100644
--- a/examples/metrics/src/main.rs
+++ b/examples/metrics/src/main.rs
@@ -134,7 +134,7 @@ impl Behaviour {
                 "/ipfs/0.1.0".into(),
                 local_pub_key,
             )),
-            keep_alive: keep_alive::Behaviour::default(),
+            keep_alive: keep_alive::Behaviour,
         }
     }
 }
diff --git a/misc/quick-protobuf-codec/src/lib.rs b/misc/quick-protobuf-codec/src/lib.rs
index 54785fbe..04ee4980 100644
--- a/misc/quick-protobuf-codec/src/lib.rs
+++ b/misc/quick-protobuf-codec/src/lib.rs
@@ -25,7 +25,7 @@ impl<In, Out> Codec<In, Out> {
         uvi.set_max_len(max_message_len_bytes);
         Self {
             uvi,
-            phantom: PhantomData::default(),
+            phantom: PhantomData,
         }
     }
 }
diff --git a/protocols/gossipsub/src/behaviour/tests.rs b/protocols/gossipsub/src/behaviour/tests.rs
index 29262e9c..37f25631 100644
--- a/protocols/gossipsub/src/behaviour/tests.rs
+++ b/protocols/gossipsub/src/behaviour/tests.rs
@@ -5099,7 +5099,7 @@ fn test_msg_id_fn_only_called_once_with_fast_message_ids() {
     }
 
     let message_id_fn = |m: &Message| -> MessageId {
-        let (mut id, mut counters_pointer): (MessageId, *mut Pointers) =
+        let (mut id, counters_pointer): (MessageId, *mut Pointers) =
             get_counters_and_hash!(&m.data);
         unsafe {
             (*counters_pointer).slow_counter += 1;
@@ -5108,7 +5108,7 @@ fn test_msg_id_fn_only_called_once_with_fast_message_ids() {
         id
     };
     let fast_message_id_fn = |m: &RawMessage| -> FastMessageId {
-        let (id, mut counters_pointer) = get_counters_and_hash!(&m.data);
+        let (id, counters_pointer) = get_counters_and_hash!(&m.data);
         unsafe {
             (*counters_pointer).fast_counter += 1;
         }
diff --git a/protocols/gossipsub/src/peer_score.rs b/protocols/gossipsub/src/peer_score.rs
index 10f56994..83f5a68e 100644
--- a/protocols/gossipsub/src/peer_score.rs
+++ b/protocols/gossipsub/src/peer_score.rs
@@ -649,7 +649,7 @@ impl PeerScore {
         }
 
         let peers: Vec<_> = {
-            let mut record = self
+            let record = self
                 .deliveries
                 .entry(msg_id.clone())
                 .or_insert_with(DeliveryRecord::default);
diff --git a/protocols/identify/tests/smoke.rs b/protocols/identify/tests/smoke.rs
index 5aff98f9..2cf7cc89 100644
--- a/protocols/identify/tests/smoke.rs
+++ b/protocols/identify/tests/smoke.rs
@@ -202,7 +202,7 @@ impl Behaviour {
     fn new(config: identify::Config) -> Self {
         Self {
             identify: identify::Behaviour::new(config),
-            keep_alive: keep_alive::Behaviour::default(),
+            keep_alive: keep_alive::Behaviour,
         }
     }
 }
diff --git a/transports/noise/src/io/framed.rs b/transports/noise/src/io/framed.rs
index 0904c024..8c1a49fc 100644
--- a/transports/noise/src/io/framed.rs
+++ b/transports/noise/src/io/framed.rs
@@ -166,7 +166,7 @@ where
     type Item = io::Result<Bytes>;
 
     fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
-        let mut this = Pin::into_inner(self);
+        let this = Pin::into_inner(self);
         loop {
             trace!("read state: {:?}", this.read_state);
             match this.read_state {
@@ -265,7 +265,7 @@ where
     type Error = io::Error;
 
     fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
-        let mut this = Pin::into_inner(self);
+        let this = Pin::into_inner(self);
         loop {
             trace!("write state {:?}", this.write_state);
             match this.write_state {
@@ -321,7 +321,7 @@ where
 
     fn start_send(self: Pin<&mut Self>, frame: &Vec<u8>) -> Result<(), Self::Error> {
         assert!(frame.len() <= MAX_FRAME_LEN);
-        let mut this = Pin::into_inner(self);
+        let this = Pin::into_inner(self);
         assert!(this.write_state.is_ready());
 
         this.write_buffer