diff --git a/tests-integration/upgrade.test.ts b/tests-integration/upgrade.test.ts
index 163f64e..2035528 100644
--- a/tests-integration/upgrade.test.ts
+++ b/tests-integration/upgrade.test.ts
@@ -150,7 +150,7 @@ describe("Test Factory Upgrade", function () {
       factory.connect(deployer);
       const { transaction_hash: tx1 } = await factory.propose_upgrade(newClassHash, calldata);
 
-      let expectedPendingUpgrade = {
+      const expectedPendingUpgrade = {
         ready_at: CURRENT_TIME + MIN_SECURITY_PERIOD,
         implementation: num.toBigInt(newClassHash),
         calldata_hash: BigInt(hash.computePoseidonHashOnElements(calldata)),