diff --git a/contracts/test/foundry/KlerosCore.t.sol b/contracts/test/foundry/KlerosCore.t.sol
index d6e0597c5..034e9274b 100644
--- a/contracts/test/foundry/KlerosCore.t.sol
+++ b/contracts/test/foundry/KlerosCore.t.sol
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: MIT
 pragma solidity 0.8.24;
 
 import {Test} from "forge-std/Test.sol";