diff --git a/integration_tests/contracts/contracts/TestICA.sol b/integration_tests/contracts/contracts/TestICA.sol
index a1d7797493..ee7359e582 100644
--- a/integration_tests/contracts/contracts/TestICA.sol
+++ b/integration_tests/contracts/contracts/TestICA.sol
@@ -103,7 +103,8 @@ contract TestICA {
     }
 
     function onPacketResultCallback(uint64 seq, bytes calldata ack) external payable returns (bool) {
-        // require(msg.sender == module_address);
+        // To prevent called by arbitrary user
+        require(msg.sender == module_address);
         lastAckSeq = seq;
         lastAck = ack;
         acknowledgement[seq] = ack;