diff --git a/fastpay_core/src/unit_tests/authority_tests.rs b/fastpay_core/src/unit_tests/authority_tests.rs
index 7010cce2cc506..c8a33e9d4bcf4 100644
--- a/fastpay_core/src/unit_tests/authority_tests.rs
+++ b/fastpay_core/src/unit_tests/authority_tests.rs
@@ -377,7 +377,9 @@ async fn test_handle_move_order() {
         MAX_GAS,
         &sender_key,
     );
-    let gas_cost = 143 + 24; // 143 is for bytecode execution, 25 is for object creation.
+    // 143 is for bytecode execution, 24 is for object creation.
+    // If the number changes, we want to verify that the change is intended.
+    let gas_cost = 143 + 24;
     let res = send_and_confirm_order(&mut authority_state, order)
         .await
         .unwrap();