diff --git a/ethers-solc/benches/compile_many.rs b/ethers-solc/benches/compile_many.rs
index b667a6b9..b0df3c7a 100644
--- a/ethers-solc/benches/compile_many.rs
+++ b/ethers-solc/benches/compile_many.rs
@@ -36,7 +36,6 @@ fn load_compiler_inputs() -> Vec<CompilerInput> {
     let mut inputs = Vec::new();
     for file in std::fs::read_dir(Path::new(&env!("CARGO_MANIFEST_DIR")).join("test-data/in"))
         .unwrap()
-        .into_iter()
         .take(5)
     {
         let file = file.unwrap();
diff --git a/ethers-solc/src/compile/mod.rs b/ethers-solc/src/compile/mod.rs
index fe40cfb9..b34913fe 100644
--- a/ethers-solc/src/compile/mod.rs
+++ b/ethers-solc/src/compile/mod.rs
@@ -457,7 +457,7 @@ impl Solc {
 
         use sha2::Digest;
         let mut hasher = sha2::Sha256::new();
-        hasher.update(&content);
+        hasher.update(content);
         let checksum_calc = &hasher.finalize()[..];
 
         let checksum_found = &RELEASES.0.get_checksum(&version).expect("checksum not found");
diff --git a/ethers-solc/src/resolver/mod.rs b/ethers-solc/src/resolver/mod.rs
index eceba2e1..848713ad 100644
--- a/ethers-solc/src/resolver/mod.rs
+++ b/ethers-solc/src/resolver/mod.rs
@@ -649,7 +649,7 @@ impl Graph {
                 return Vec::new()
             }
 
-            let mut result = sets.pop().cloned().expect("not empty; qed.").clone();
+            let mut result = sets.pop().cloned().expect("not empty; qed.");
             if !sets.is_empty() {
                 result.retain(|item| sets.iter().all(|set| set.contains(item)));
             }