diff --git a/Cargo.toml b/Cargo.toml
index 7bc0e6ecb6..37861debb6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,8 +54,8 @@ test-case = "2.2.2"
 thiserror = "1.0.37"
 
 [workspace.lints.rust]
-warnings = "deny"
 future-incompatible = "deny"
 nonstandard-style = "deny"
 rust-2018-idioms = "deny"
-unused = "deny"
+unused = { level = "deny", priority = -1 }
+warnings = "deny"
diff --git a/crates/blockifier/src/fee/actual_cost.rs b/crates/blockifier/src/fee/actual_cost.rs
index 7e53d50bca..4d51ccd67d 100644
--- a/crates/blockifier/src/fee/actual_cost.rs
+++ b/crates/blockifier/src/fee/actual_cost.rs
@@ -189,7 +189,7 @@ impl<'a> ActualCostBuilder<'a> {
         let bouncer_resources = actual_resources.clone();
 
         // Add reverted steps to actual_resources' n_steps for correct fee charge.
-        *actual_resources.0.get_mut(&abi_constants::N_STEPS_RESOURCE.to_string()).unwrap() +=
+        *actual_resources.0.get_mut(abi_constants::N_STEPS_RESOURCE).unwrap() +=
             self.n_reverted_steps;
 
         let tx_info = &self.tx_context.tx_info;