diff --git a/ethers-contract/tests/it/common/derive.rs b/ethers-contract/tests/it/common/derive.rs
index 6aad8e1b..aeaff216 100644
--- a/ethers-contract/tests/it/common/derive.rs
+++ b/ethers-contract/tests/it/common/derive.rs
@@ -387,9 +387,9 @@ fn eth_display_works() {
 
     let val = format!(
         "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, 50, 100, 0x{}, {}, 0x{}, {:?}, 0x{}",
-        hex::encode(&item.h),
+        hex::encode(item.h),
         item.i,
-        hex::encode(&item.arr_u8),
+        hex::encode(item.arr_u8),
         item.arr_u16,
         hex::encode(&item.v),
     );
diff --git a/ethers-core/src/types/bytes.rs b/ethers-core/src/types/bytes.rs
index a23f0521..e6cbca1a 100644
--- a/ethers-core/src/types/bytes.rs
+++ b/ethers-core/src/types/bytes.rs
@@ -157,7 +157,7 @@ impl FromStr for Bytes {
         if let Some(value) = value.strip_prefix("0x") {
             hex::decode(value)
         } else {
-            hex::decode(&value)
+            hex::decode(value)
         }
         .map(Into::into)
         .map_err(|e| ParseBytesError(format!("Invalid hex: {}", e)))
diff --git a/ethers-core/src/types/transaction/eip2718.rs b/ethers-core/src/types/transaction/eip2718.rs
index df147ebf..62134380 100644
--- a/ethers-core/src/types/transaction/eip2718.rs
+++ b/ethers-core/src/types/transaction/eip2718.rs
@@ -311,7 +311,7 @@ impl TypedTransaction {
 
     /// Hashes the transaction's data with the included signature.
     pub fn hash(&self, signature: &Signature) -> H256 {
-        keccak256(&self.rlp_signed(signature).as_ref()).into()
+        keccak256(self.rlp_signed(signature).as_ref()).into()
     }
 
     /// Decodes a signed TypedTransaction from a rlp encoded byte stream
diff --git a/ethers-core/src/types/transaction/response.rs b/ethers-core/src/types/transaction/response.rs
index 6f624241..bb61aaf1 100644
--- a/ethers-core/src/types/transaction/response.rs
+++ b/ethers-core/src/types/transaction/response.rs
@@ -130,7 +130,7 @@ impl Transaction {
     }
 
     pub fn hash(&self) -> H256 {
-        keccak256(&self.rlp().as_ref()).into()
+        keccak256(self.rlp().as_ref()).into()
     }
 
     pub fn rlp(&self) -> Bytes {
diff --git a/ethers-etherscan/src/source_tree.rs b/ethers-etherscan/src/source_tree.rs
index 015bb84a..4ec55ad7 100644
--- a/ethers-etherscan/src/source_tree.rs
+++ b/ethers-etherscan/src/source_tree.rs
@@ -19,7 +19,7 @@ impl SourceTree {
     /// Expand the source tree into the provided directory.  This method sanitizes paths to ensure
     /// that no directory traversal happens.
     pub fn write_to(&self, dir: &Path) -> Result<()> {
-        create_dir_all(&dir)?;
+        create_dir_all(dir)?;
         for entry in &self.entries {
             let mut sanitized_path = sanitize_path(&entry.path);
             if sanitized_path.extension().is_none() {
diff --git a/ethers-providers/src/provider.rs b/ethers-providers/src/provider.rs
index 7d36041b..0aec2f7b 100644
--- a/ethers-providers/src/provider.rs
+++ b/ethers-providers/src/provider.rs
@@ -936,8 +936,7 @@ impl<P: JsonRpcClient> Middleware for Provider<P> {
             .map_err(|e| ProviderError::CustomError(format!("Invalid metadata url: {}", e)))?;
 
         if token.type_ == erc::ERCNFTType::ERC1155 {
-            metadata_url
-                .set_path(&metadata_url.path().replace("%7Bid%7D", &hex::encode(&token.id)));
+            metadata_url.set_path(&metadata_url.path().replace("%7Bid%7D", &hex::encode(token.id)));
         }
         if metadata_url.scheme() == "ipfs" {
             metadata_url = erc::http_link_ipfs(metadata_url).map_err(ProviderError::CustomError)?;
@@ -1265,7 +1264,7 @@ impl<P: JsonRpcClient> Provider<P> {
                 "`{}` resolver ({:?}) does not support selector {}.",
                 ens_name,
                 resolver_address,
-                hex::encode(&selector)
+                hex::encode(selector)
             )))
         }
 
diff --git a/ethers-signers/src/aws/mod.rs b/ethers-signers/src/aws/mod.rs
index d489bfe7..bfca3ec4 100644
--- a/ethers-signers/src/aws/mod.rs
+++ b/ethers-signers/src/aws/mod.rs
@@ -123,7 +123,7 @@ where
     resp
 }
 
-#[instrument(err, skip(kms, digest, key_id), fields(digest = %hex::encode(&digest), key_id = %key_id.as_ref()))]
+#[instrument(err, skip(kms, digest, key_id), fields(digest = %hex::encode(digest), key_id = %key_id.as_ref()))]
 async fn request_sign_digest<T>(
     kms: &KmsClient,
     key_id: T,
@@ -165,8 +165,8 @@ impl<'a> AwsSigner<'a> {
 
         debug!(
             "Instantiated AWS signer with pubkey 0x{} and address 0x{}",
-            hex::encode(&pubkey.to_bytes()),
-            hex::encode(&address)
+            hex::encode(pubkey.to_bytes()),
+            hex::encode(address)
         );
 
         Ok(Self { kms, chain_id, key_id: key_id.as_ref().to_owned(), pubkey, address })
@@ -204,7 +204,7 @@ impl<'a> AwsSigner<'a> {
 
     /// Sign a digest with this signer's key and add the eip155 `v` value
     /// corresponding to the input chain_id
-    #[instrument(err, skip(digest), fields(digest = %hex::encode(&digest)))]
+    #[instrument(err, skip(digest), fields(digest = %hex::encode(digest)))]
     async fn sign_digest_with_eip155(
         &self,
         digest: H256,
diff --git a/ethers-signers/src/ledger/app.rs b/ethers-signers/src/ledger/app.rs
index 59d7bef1..3db050f3 100644
--- a/ethers-signers/src/ledger/app.rs
+++ b/ethers-signers/src/ledger/app.rs
@@ -243,7 +243,7 @@ impl LedgerEthereum {
                 index |= 0x80000000;
             }
 
-            bytes.extend(&index.to_be_bytes());
+            bytes.extend(index.to_be_bytes());
         }
 
         bytes
diff --git a/ethers-solc/src/cache.rs b/ethers-solc/src/cache.rs
index 2329a5a5..4943b69f 100644
--- a/ethers-solc/src/cache.rs
+++ b/ethers-solc/src/cache.rs
@@ -607,7 +607,7 @@ impl<'a, T: ArtifactOutput> ArtifactsCacheInner<'a, T> {
             .collect();
 
         let entry = CacheEntry {
-            last_modification_date: CacheEntry::read_last_modification_date(&file)
+            last_modification_date: CacheEntry::read_last_modification_date(file)
                 .unwrap_or_default(),
             content_hash: source.content_hash(),
             source_name: utils::source_name(file, self.project.root()).into(),
@@ -721,7 +721,7 @@ impl<'a, T: ArtifactOutput> ArtifactsCacheInner<'a, T> {
     /// returns `false` if the corresponding cache entry remained unchanged otherwise `true`
     fn is_dirty(&self, file: &Path, version: &Version) -> bool {
         if let Some(hash) = self.content_hashes.get(file) {
-            if let Some(entry) = self.cache.entry(&file) {
+            if let Some(entry) = self.cache.entry(file) {
                 if entry.content_hash.as_bytes() != hash.as_bytes() {
                     tracing::trace!("changed content hash for source file \"{}\"", file.display());
                     return true
diff --git a/ethers-solc/src/compile/mod.rs b/ethers-solc/src/compile/mod.rs
index 46ebed6c..22ca3520 100644
--- a/ethers-solc/src/compile/mod.rs
+++ b/ethers-solc/src/compile/mod.rs
@@ -465,7 +465,7 @@ impl Solc {
         if checksum_calc == checksum_found {
             Ok(())
         } else {
-            let expected = hex::encode(&checksum_found);
+            let expected = hex::encode(checksum_found);
             let detected = hex::encode(checksum_calc);
             tracing:: warn!(target : "solc", "checksum mismatch for {:?}, expected {}, but found {} for file {:?}", version, expected, detected, version_path);
             Err(SolcError::ChecksumMismatch { version, expected, detected, file: version_path })
diff --git a/ethers-solc/src/config.rs b/ethers-solc/src/config.rs
index 41a52ad3..9195cd6a 100644
--- a/ethers-solc/src/config.rs
+++ b/ethers-solc/src/config.rs
@@ -923,13 +923,13 @@ mod tests {
         std::fs::File::create(&contracts).unwrap();
         assert_eq!(ProjectPathsConfig::find_source_dir(root), contracts,);
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).sources,
+            ProjectPathsConfig::builder().build_with_root(root).sources,
             utils::canonicalized(contracts),
         );
         std::fs::File::create(&src).unwrap();
         assert_eq!(ProjectPathsConfig::find_source_dir(root), src,);
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).sources,
+            ProjectPathsConfig::builder().build_with_root(root).sources,
             utils::canonicalized(src),
         );
 
@@ -937,18 +937,18 @@ mod tests {
         std::fs::File::create(&artifacts).unwrap();
         assert_eq!(ProjectPathsConfig::find_artifacts_dir(root), artifacts,);
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).artifacts,
+            ProjectPathsConfig::builder().build_with_root(root).artifacts,
             utils::canonicalized(artifacts),
         );
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).build_infos,
+            ProjectPathsConfig::builder().build_with_root(root).build_infos,
             utils::canonicalized(build_infos)
         );
 
         std::fs::File::create(&out).unwrap();
         assert_eq!(ProjectPathsConfig::find_artifacts_dir(root), out,);
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).artifacts,
+            ProjectPathsConfig::builder().build_with_root(root).artifacts,
             utils::canonicalized(out),
         );
 
@@ -956,13 +956,13 @@ mod tests {
         std::fs::File::create(&node_modules).unwrap();
         assert_eq!(ProjectPathsConfig::find_libs(root), vec![node_modules.clone()],);
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).libraries,
+            ProjectPathsConfig::builder().build_with_root(root).libraries,
             vec![utils::canonicalized(node_modules)],
         );
         std::fs::File::create(&lib).unwrap();
         assert_eq!(ProjectPathsConfig::find_libs(root), vec![lib.clone()],);
         assert_eq!(
-            ProjectPathsConfig::builder().build_with_root(&root).libraries,
+            ProjectPathsConfig::builder().build_with_root(root).libraries,
             vec![utils::canonicalized(lib)],
         );
     }
@@ -975,7 +975,7 @@ mod tests {
 
         // Set the artifacts directory without setting the
         // build info directory
-        let project = ProjectPathsConfig::builder().artifacts(&artifacts).build_with_root(&root);
+        let project = ProjectPathsConfig::builder().artifacts(&artifacts).build_with_root(root);
 
         // The artifacts should be set correctly based on the configured value
         assert_eq!(project.artifacts, utils::canonicalized(artifacts));
diff --git a/ethers-solc/src/utils.rs b/ethers-solc/src/utils.rs
index 89636366..ce3d1c26 100644
--- a/ethers-solc/src/utils.rs
+++ b/ethers-solc/src/utils.rs
@@ -564,7 +564,7 @@ pragma solidity ^0.8.0;
         let a = Path::new("/foo/bar/bar/test.txt");
         let b = Path::new("/foo/bar/foo/example/constract.sol");
         let expected = Path::new("/foo/bar");
-        assert_eq!(common_ancestor(&a, &b).unwrap(), expected.to_path_buf())
+        assert_eq!(common_ancestor(a, b).unwrap(), expected.to_path_buf())
     }
 
     #[test]
diff --git a/ethers-solc/tests/project.rs b/ethers-solc/tests/project.rs
index 41fcb6f6..fa7de6d9 100644
--- a/ethers-solc/tests/project.rs
+++ b/ethers-solc/tests/project.rs
@@ -385,7 +385,7 @@ fn can_compile_dapp_sample_with_cache() {
     assert!(compiled.is_unchanged());
 
     // deleted artifacts cause recompile even with cache
-    std::fs::remove_dir_all(&project.artifacts_path()).unwrap();
+    std::fs::remove_dir_all(project.artifacts_path()).unwrap();
     let compiled = project.compile().unwrap();
     assert!(compiled.find_first("Dapp").is_some());
     assert!(!compiled.is_unchanged());