diff --git a/core/CHANGELOG.md b/core/CHANGELOG.md
index ddb02807e632..6f2671e13caf 100644
--- a/core/CHANGELOG.md
+++ b/core/CHANGELOG.md
@@ -1,6 +1,6 @@
 - Change `PublicKey::into_protobuf_encoding` to `PublicKey::to_protobuf_encoding`.
   Change `PublicKey::into_peer_id` to `PublicKey::to_peer_id`.
-  Change `PeerId::from_public_key(PublicKey)` to `PeerId::from_public_key(PublicKey)`.
+  Change `PeerId::from_public_key(PublicKey)` to `PeerId::from_public_key(&PublicKey)`.
   Add `From<&PublicKey> for PeerId`.
   See [PR 2145]
 
diff --git a/core/src/peer_id.rs b/core/src/peer_id.rs
index b7e4b976e5bf..001db2985227 100644
--- a/core/src/peer_id.rs
+++ b/core/src/peer_id.rs
@@ -113,7 +113,7 @@ impl PeerId {
     pub fn is_public_key(&self, public_key: &PublicKey) -> Option<bool> {
         let alg = Code::try_from(self.multihash.code())
             .expect("Internal multihash is always a valid `Code`");
-        let enc = public_key.clone().to_protobuf_encoding();
+        let enc = public_key.to_protobuf_encoding();
         Some(alg.digest(&enc) == self.multihash)
     }
 }
@@ -189,7 +189,7 @@ mod tests {
     #[test]
     fn peer_id_is_public_key() {
         let key = identity::Keypair::generate_ed25519().public();
-        let peer_id = key.clone().to_peer_id();
+        let peer_id = key.to_peer_id();
         assert_eq!(peer_id.is_public_key(&key), Some(true));
     }
 
@@ -213,7 +213,7 @@ mod tests {
 
     #[test]
     fn random_peer_id_is_valid() {
-        for _ in 0..5000 {
+        for _ in 0 .. 5000 {
             let peer_id = PeerId::random();
             assert_eq!(peer_id, PeerId::from_bytes(&peer_id.to_bytes()).unwrap());
         }