diff --git a/crates/blockifier/src/execution/native/syscall_handler.rs b/crates/blockifier/src/execution/native/syscall_handler.rs
index 2f643d3879..42095370f6 100644
--- a/crates/blockifier/src/execution/native/syscall_handler.rs
+++ b/crates/blockifier/src/execution/native/syscall_handler.rs
@@ -266,7 +266,7 @@ impl<'state> StarknetSyscallHandler for &mut NativeSyscallHandler<'state> {
 
         match syscall_base::get_block_hash_base(self.context, block_number, self.state) {
             Ok(value) => Ok(value),
-            Err(e) => Err(self.handle_error(remaining_gas, e.into())),
+            Err(e) => Err(self.handle_error(remaining_gas, e)),
         }
     }
 
@@ -411,8 +411,7 @@ impl<'state> StarknetSyscallHandler for &mut NativeSyscallHandler<'state> {
             storage_address: self.call.storage_address,
             caller_address: self.call.caller_address,
             call_type: CallType::Delegate,
-            initial_gas: u64::try_from(*remaining_gas)
-                .expect("Failed to convert gas (u128 -> u64)"),
+            initial_gas: *remaining_gas,
         };
 
         Ok(self.execute_inner_call(entry_point, remaining_gas)?.0)
@@ -450,8 +449,7 @@ impl<'state> StarknetSyscallHandler for &mut NativeSyscallHandler<'state> {
             storage_address: contract_address,
             caller_address: self.call.caller_address,
             call_type: CallType::Call,
-            initial_gas: u64::try_from(*remaining_gas)
-                .expect("Failed to convert gas from u128 to u64."),
+            initial_gas: *remaining_gas,
         };
 
         Ok(self.execute_inner_call(entry_point, remaining_gas)?.0)
@@ -578,9 +576,8 @@ impl<'state> StarknetSyscallHandler for &mut NativeSyscallHandler<'state> {
 
         // TODO(Ori, 1/2/2024): Write an indicative expect message explaining why the conversion
         // works.
-        let n_rounds_as_u128 = u64::try_from(n_rounds).expect("Failed to convert usize to u128.");
-        let gas_cost =
-            n_rounds_as_u128 * u64::from(self.context.gas_costs().keccak_round_cost_gas_cost);
+        let n_rounds = u64::try_from(n_rounds).expect("Failed to convert usize to u64.");
+        let gas_cost = n_rounds * self.context.gas_costs().keccak_round_cost_gas_cost;
 
         if gas_cost > *remaining_gas {
             return Err(self.handle_error(
diff --git a/crates/blockifier/src/fee/gas_usage_test.rs b/crates/blockifier/src/fee/gas_usage_test.rs
index 10cdb2c96d..4b2809502b 100644
--- a/crates/blockifier/src/fee/gas_usage_test.rs
+++ b/crates/blockifier/src/fee/gas_usage_test.rs
@@ -70,7 +70,7 @@ fn starknet_resources() -> StarknetResources {
         .map(|call_info| call_info.with_some_class_hash())
         .collect();
     let execution_summary =
-        CallInfo::summarize_many(call_infos.iter(), &VersionedConstants::latest_constants());
+        CallInfo::summarize_many(call_infos.iter(), VersionedConstants::latest_constants());
     let state_resources = StateResources::new_for_testing(StateChangesCount {
         n_storage_updates: 7,
         n_class_hash_updates: 11,
diff --git a/crates/blockifier/src/fee/receipt_test.rs b/crates/blockifier/src/fee/receipt_test.rs
index 5b4286ce34..b15916a12c 100644
--- a/crates/blockifier/src/fee/receipt_test.rs
+++ b/crates/blockifier/src/fee/receipt_test.rs
@@ -432,7 +432,7 @@ fn test_calculate_tx_gas_usage(
     let execution_call_info =
         &tx_execution_info.execute_call_info.expect("Execution call info should exist.");
     let execution_summary =
-        CallInfo::summarize_many(vec![execution_call_info].into_iter(), &versioned_constants);
+        CallInfo::summarize_many(vec![execution_call_info].into_iter(), versioned_constants);
     let starknet_resources = StarknetResources::new(
         calldata_length,
         signature_length,
diff --git a/crates/blockifier/src/test_utils/contracts.rs b/crates/blockifier/src/test_utils/contracts.rs
index bf572839f0..7a4bb8fa93 100644
--- a/crates/blockifier/src/test_utils/contracts.rs
+++ b/crates/blockifier/src/test_utils/contracts.rs
@@ -189,7 +189,7 @@ impl FeatureContract {
         #[cfg(feature = "cairo_native")]
         if CairoVersion::Native == self.cairo_version() {
             let native_contract_class =
-                NativeContractClassV1::compile_or_get_cached(&self.get_compiled_path()).into();
+                NativeContractClassV1::compile_or_get_cached(&self.get_compiled_path());
             return RunnableContractClass::V1Native(native_contract_class);
         }
 
diff --git a/crates/blockifier/src/transaction/objects_test.rs b/crates/blockifier/src/transaction/objects_test.rs
index d736adb89c..29ef00aed6 100644
--- a/crates/blockifier/src/transaction/objects_test.rs
+++ b/crates/blockifier/src/transaction/objects_test.rs
@@ -139,7 +139,7 @@ fn test_events_counter_in_tx_execution_info(
     };
 
     assert_eq!(
-        tx_execution_info.summarize(&VersionedConstants::latest_constants()).event_summary.n_events,
+        tx_execution_info.summarize(VersionedConstants::latest_constants()).event_summary.n_events,
         n_validate_events + n_execute_events + n_fee_transfer_events + n_inner_calls
     );
 }