diff --git a/account-decoder/src/parse_token.rs b/account-decoder/src/parse_token.rs
index b1bccfc537..41efcb5557 100644
--- a/account-decoder/src/parse_token.rs
+++ b/account-decoder/src/parse_token.rs
@@ -116,6 +116,7 @@ pub fn parse_token(
 
 #[derive(Debug, Serialize, Deserialize, PartialEq)]
 #[serde(rename_all = "camelCase", tag = "type", content = "info")]
+#[allow(clippy::large_enum_variant)]
 pub enum TokenAccountType {
     Account(UiTokenAccount),
     Mint(UiMint),
diff --git a/clap-utils/src/input_parsers.rs b/clap-utils/src/input_parsers.rs
index 5e1f2d44f0..d2b77d69bf 100644
--- a/clap-utils/src/input_parsers.rs
+++ b/clap-utils/src/input_parsers.rs
@@ -217,7 +217,7 @@ mod tests {
         use std::env;
         let out_dir = env::var("FARF_DIR").unwrap_or_else(|_| "farf".to_string());
 
-        format!("{}/tmp/{}-{}", out_dir, name, pubkey.to_string())
+        format!("{}/tmp/{}-{}", out_dir, name, pubkey)
     }
 
     #[test]
diff --git a/cli-output/src/cli_output.rs b/cli-output/src/cli_output.rs
index 51eab27ac6..f32b08b6f3 100644
--- a/cli-output/src/cli_output.rs
+++ b/cli-output/src/cli_output.rs
@@ -316,10 +316,10 @@ impl fmt::Display for CliEpochInfo {
             "Epoch Completed Time:",
             &format!(
                 "{}{}/{} ({} remaining)",
-                humantime::format_duration(time_elapsed).to_string(),
+                humantime::format_duration(time_elapsed),
                 if annotation.is_some() { "*" } else { "" },
-                humantime::format_duration(time_elapsed + time_remaining).to_string(),
-                humantime::format_duration(time_remaining).to_string(),
+                humantime::format_duration(time_elapsed + time_remaining),
+                humantime::format_duration(time_remaining),
             ),
         )?;
         if let Some(annotation) = annotation {
@@ -2593,11 +2593,7 @@ mod tests {
             CliSignOnlyData {
                 blockhash: blockhash.to_string(),
                 message: None,
-                signers: vec![format!(
-                    "{}={}",
-                    present.pubkey().to_string(),
-                    tx.signatures[1]
-                )],
+                signers: vec![format!("{}={}", present.pubkey(), tx.signatures[1])],
                 absent: vec![absent.pubkey().to_string()],
                 bad_sig: vec![bad.pubkey().to_string()],
             }
@@ -2627,11 +2623,7 @@ mod tests {
             CliSignOnlyData {
                 blockhash: blockhash.to_string(),
                 message: Some(expected_msg),
-                signers: vec![format!(
-                    "{}={}",
-                    present.pubkey().to_string(),
-                    tx.signatures[1]
-                )],
+                signers: vec![format!("{}={}", present.pubkey(), tx.signatures[1])],
                 absent: vec![absent.pubkey().to_string()],
                 bad_sig: vec![bad.pubkey().to_string()],
             }
diff --git a/cli-output/src/display.rs b/cli-output/src/display.rs
index f1d52c1f67..4ae569a6ff 100644
--- a/cli-output/src/display.rs
+++ b/cli-output/src/display.rs
@@ -338,7 +338,7 @@ pub fn write_transaction<W: io::Write>(
                     let sign = if reward.lamports < 0 { "-" } else { "" };
                     writeln!(
                         w,
-                        "{}  {:<44}  {:^15}  {:<15}  {}",
+                        "{}  {:<44}  {:^15}  {}◎{:<14.9}  ◎{:<18.9}",
                         prefix,
                         reward.pubkey,
                         if let Some(reward_type) = reward.reward_type {
@@ -346,12 +346,9 @@ pub fn write_transaction<W: io::Write>(
                         } else {
                             "-".to_string()
                         },
-                        format!(
-                            "{}◎{:<14.9}",
-                            sign,
-                            lamports_to_sol(reward.lamports.abs() as u64)
-                        ),
-                        format!("◎{:<18.9}", lamports_to_sol(reward.post_balance),)
+                        sign,
+                        lamports_to_sol(reward.lamports.abs() as u64),
+                        lamports_to_sol(reward.post_balance)
                     )?;
                 }
             }
diff --git a/core/src/cluster_nodes.rs b/core/src/cluster_nodes.rs
index ff0ce1124c..7ca962b213 100644
--- a/core/src/cluster_nodes.rs
+++ b/core/src/cluster_nodes.rs
@@ -33,6 +33,7 @@ use {
     },
 };
 
+#[allow(clippy::large_enum_variant)]
 enum NodeId {
     // TVU node obtained through gossip (staked or not).
     ContactInfo(ContactInfo),
diff --git a/core/src/fetch_stage.rs b/core/src/fetch_stage.rs
index 239db3199b..b99b569e03 100644
--- a/core/src/fetch_stage.rs
+++ b/core/src/fetch_stage.rs
@@ -95,6 +95,7 @@ impl FetchStage {
         {
             inc_new_counter_debug!("fetch_stage-honor_forwards", len);
             for packets in batch {
+                #[allow(clippy::question_mark)]
                 if sendr.send(packets).is_err() {
                     return Err(Error::Send);
                 }
diff --git a/frozen-abi/macro/src/lib.rs b/frozen-abi/macro/src/lib.rs
index ee0a4fdf2b..1c70ce1867 100644
--- a/frozen-abi/macro/src/lib.rs
+++ b/frozen-abi/macro/src/lib.rs
@@ -310,10 +310,7 @@ fn quote_for_test(
 
 #[cfg(RUSTC_WITH_SPECIALIZATION)]
 fn test_mod_name(type_name: &Ident) -> Ident {
-    Ident::new(
-        &format!("{}_frozen_abi", type_name.to_string()),
-        Span::call_site(),
-    )
+    Ident::new(&format!("{}_frozen_abi", type_name), Span::call_site())
 }
 
 #[cfg(RUSTC_WITH_SPECIALIZATION)]
diff --git a/ledger-tool/src/main.rs b/ledger-tool/src/main.rs
index f9ace59e8d..880389aa11 100644
--- a/ledger-tool/src/main.rs
+++ b/ledger-tool/src/main.rs
@@ -94,19 +94,16 @@ fn output_slot_rewards(blockstore: &Blockstore, slot: Slot, method: &LedgerOutpu
                 for reward in rewards {
                     let sign = if reward.lamports < 0 { "-" } else { "" };
                     println!(
-                        "    {:<44}  {:^15}  {:<15}  {}   {}",
+                        "    {:<44}  {:^15}  {}◎{:<14.9}  ◎{:<18.9}   {}",
                         reward.pubkey,
                         if let Some(reward_type) = reward.reward_type {
                             format!("{}", reward_type)
                         } else {
                             "-".to_string()
                         },
-                        format!(
-                            "{}◎{:<14.9}",
-                            sign,
-                            lamports_to_sol(reward.lamports.abs() as u64)
-                        ),
-                        format!("◎{:<18.9}", lamports_to_sol(reward.post_balance)),
+                        sign,
+                        lamports_to_sol(reward.lamports.abs() as u64),
+                        lamports_to_sol(reward.post_balance),
                         reward
                             .commission
                             .map(|commission| format!("{:>9}%", commission))
diff --git a/ledger/src/blockstore_processor.rs b/ledger/src/blockstore_processor.rs
index ea816d12bf..a3bbc33ca1 100644
--- a/ledger/src/blockstore_processor.rs
+++ b/ledger/src/blockstore_processor.rs
@@ -1355,6 +1355,7 @@ fn process_single_slot(
     Ok(())
 }
 
+#[allow(clippy::large_enum_variant)]
 pub enum TransactionStatusMessage {
     Batch(TransactionStatusBatch),
     Freeze(Slot),
diff --git a/log-analyzer/src/main.rs b/log-analyzer/src/main.rs
index a49a84b08a..0b488976b4 100644
--- a/log-analyzer/src/main.rs
+++ b/log-analyzer/src/main.rs
@@ -40,11 +40,9 @@ impl LogLine {
         format!(
             "Lost {}%, {}, ({} - {}), sender {}, receiver {}",
             ((v1 - v2) * 100 / v1),
-            Byte::from_bytes(v1 - v2)
-                .get_appropriate_unit(true)
-                .to_string(),
-            Byte::from_bytes(v1).get_appropriate_unit(true).to_string(),
-            Byte::from_bytes(v2).get_appropriate_unit(true).to_string(),
+            Byte::from_bytes(v1 - v2).get_appropriate_unit(true),
+            Byte::from_bytes(v1).get_appropriate_unit(true),
+            Byte::from_bytes(v2).get_appropriate_unit(true),
             a,
             b
         )
diff --git a/programs/bpf_loader/build.rs b/programs/bpf_loader/build.rs
index 2c665cd93f..e0a09cf7f3 100644
--- a/programs/bpf_loader/build.rs
+++ b/programs/bpf_loader/build.rs
@@ -29,6 +29,7 @@ fn main() {
     let mut out = BufWriter::new(file);
     let sysc_re = Regex::new(r#"register_syscall_by_name\([[:space:]]*b"([^"]+)","#).unwrap();
     for caps in sysc_re.captures_iter(text) {
-        writeln!(out, "{}", caps[1].to_string()).unwrap();
+        let name = caps[1].to_string();
+        writeln!(out, "{}", name).unwrap();
     }
 }
diff --git a/rpc/src/rpc.rs b/rpc/src/rpc.rs
index ea9c8245d4..07b49b2bdf 100644
--- a/rpc/src/rpc.rs
+++ b/rpc/src/rpc.rs
@@ -1999,6 +1999,7 @@ fn verify_transaction(
     transaction: &SanitizedTransaction,
     feature_set: &Arc<feature_set::FeatureSet>,
 ) -> Result<()> {
+    #[allow(clippy::question_mark)]
     if transaction.verify().is_err() {
         return Err(RpcCustomError::TransactionSignatureVerificationFailure.into());
     }
@@ -4912,11 +4913,11 @@ pub mod tests {
             r#"{"jsonrpc":"2.0","id":1,"method":"getLeaderSchedule"}"#,
             &format!(
                 r#"{{"jsonrpc":"2.0","id":1,"method":"getLeaderSchedule", "params": [null, {{ "identity": "{}" }}]}}"#,
-                bank.collector_id().to_string()
+                bank.collector_id()
             ),
             &format!(
                 r#"{{"jsonrpc":"2.0","id":1,"method":"getLeaderSchedule", "params": [{{ "identity": "{}" }}]}}"#,
-                bank.collector_id().to_string()
+                bank.collector_id()
             ),
         ]
         .iter()
@@ -5657,7 +5658,6 @@ pub mod tests {
                 "sigVerify": true,
                 "replaceRecentBlockhash": true,
             })
-            .to_string()
         );
         let res = io.handle_request_sync(&req, meta.clone());
         let expected = json!({
diff --git a/rpc/src/rpc_pubsub.rs b/rpc/src/rpc_pubsub.rs
index 250cf758b5..1f27a798bf 100644
--- a/rpc/src/rpc_pubsub.rs
+++ b/rpc/src/rpc_pubsub.rs
@@ -714,7 +714,7 @@ mod tests {
         let tx = system_transaction::transfer(&alice, &bob_pubkey, 20, blockhash);
         let req = format!(
             r#"{{"jsonrpc":"2.0","id":1,"method":"signatureSubscribe","params":["{}"]}}"#,
-            tx.signatures[0].to_string()
+            tx.signatures[0]
         );
         let _res = io.handle_request_sync(&req);
 
@@ -971,7 +971,7 @@ mod tests {
 
         let req = format!(
             r#"{{"jsonrpc":"2.0","id":1,"method":"accountSubscribe","params":["{}"]}}"#,
-            bob_pubkey.to_string()
+            bob_pubkey
         );
         let _res = io.handle_request_sync(&req);
 
diff --git a/tokens/src/args.rs b/tokens/src/args.rs
index a83c7e182e..b1f1522e15 100644
--- a/tokens/src/args.rs
+++ b/tokens/src/args.rs
@@ -42,6 +42,7 @@ pub struct TransactionLogArgs {
     pub output_path: String,
 }
 
+#[allow(clippy::large_enum_variant)]
 pub enum Command {
     DistributeTokens(DistributeTokensArgs),
     Balances(BalancesArgs),
diff --git a/tokens/src/commands.rs b/tokens/src/commands.rs
index b5815e80d8..718f8947fd 100644
--- a/tokens/src/commands.rs
+++ b/tokens/src/commands.rs
@@ -1542,7 +1542,7 @@ mod tests {
         use std::env;
         let out_dir = env::var("FARF_DIR").unwrap_or_else(|_| "farf".to_string());
 
-        format!("{}/tmp/{}-{}", out_dir, name, pubkey.to_string())
+        format!("{}/tmp/{}-{}", out_dir, name, pubkey)
     }
 
     fn initialize_check_payer_balances_inputs(
diff --git a/tokens/src/db.rs b/tokens/src/db.rs
index bd250597c7..9d3bb6ed82 100644
--- a/tokens/src/db.rs
+++ b/tokens/src/db.rs
@@ -162,11 +162,7 @@ pub fn update_finalized_transaction(
 
     if let Some(e) = &transaction_status.err {
         // The transaction was finalized, but execution failed. Drop it.
-        eprintln!(
-            "Error in transaction with signature {}: {}",
-            signature,
-            e.to_string()
-        );
+        eprintln!("Error in transaction with signature {}: {}", signature, e);
         eprintln!("Discarding transaction record");
         db.rem(&signature.to_string())?;
         return Ok(None);
diff --git a/validator/src/bootstrap.rs b/validator/src/bootstrap.rs
index be67c66bce..4f11f589e7 100644
--- a/validator/src/bootstrap.rs
+++ b/validator/src/bootstrap.rs
@@ -318,7 +318,7 @@ fn check_vote_account(
 ) -> Result<(), String> {
     let vote_account = rpc_client
         .get_account_with_commitment(vote_account_address, CommitmentConfig::confirmed())
-        .map_err(|err| format!("failed to fetch vote account: {}", err.to_string()))?
+        .map_err(|err| format!("failed to fetch vote account: {}", err))?
         .value
         .ok_or_else(|| format!("vote account does not exist: {}", vote_account_address))?;
 
@@ -331,7 +331,7 @@ fn check_vote_account(
 
     let identity_account = rpc_client
         .get_account_with_commitment(identity_pubkey, CommitmentConfig::confirmed())
-        .map_err(|err| format!("failed to fetch identity account: {}", err.to_string()))?
+        .map_err(|err| format!("failed to fetch identity account: {}", err))?
         .value
         .ok_or_else(|| format!("identity account does not exist: {}", identity_pubkey))?;
 
diff --git a/validator/src/dashboard.rs b/validator/src/dashboard.rs
index 7417994e60..436c4a1ea3 100644
--- a/validator/src/dashboard.rs
+++ b/validator/src/dashboard.rs
@@ -108,7 +108,7 @@ impl Dashboard {
                     println_name_value("TPU Address:", &tpu.to_string());
                 }
                 if let Some(rpc) = contact_info.rpc {
-                    println_name_value("JSON RPC URL:", &format!("http://{}", rpc.to_string()));
+                    println_name_value("JSON RPC URL:", &format!("http://{}", rpc));
                 }
             }