diff --git a/hardhat.config.ts b/hardhat.config.ts
index f17daecc..6aeb72ba 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -53,6 +53,16 @@ const solidity = {
         evmVersion: 'cancun',
       },
     },
+    'src/mocks/ArbOS11To32UpgradeTest.sol': {
+      version: '0.8.24',
+      settings: {
+        optimizer: {
+          enabled: true,
+          runs: 100,
+        },
+        evmVersion: 'cancun',
+      },
+    },
   },
 }
 
@@ -89,6 +99,16 @@ if (process.env['INTERFACE_TESTER_SOLC_VERSION']) {
         evmVersion: 'cancun',
       },
     },
+    'src/mocks/ArbOS11To32UpgradeTest.sol': {
+      version: '0.8.24',
+      settings: {
+        optimizer: {
+          enabled: true,
+          runs: 100,
+        },
+        evmVersion: 'cancun',
+      },
+    },
   }
 }
 
diff --git a/src/mocks/ArbOS11To32UpgradeTest.sol b/src/mocks/ArbOS11To32UpgradeTest.sol
new file mode 100644
index 00000000..6e8f3e55
--- /dev/null
+++ b/src/mocks/ArbOS11To32UpgradeTest.sol
@@ -0,0 +1,18 @@
+// Copyright 2024, Offchain Labs, Inc.
+// For license information, see https://github.com/OffchainLabs/nitro-contracts/blob/main/LICENSE
+// SPDX-License-Identifier: BUSL-1.1
+
+pragma solidity ^0.8.24;
+
+import "../precompiles/ArbSys.sol";
+
+contract ArbOS11To32UpgradeTest {
+    function mcopy() external returns (bytes32 x) {
+        assembly {
+            mstore(0x20, 0x9) // Store 0x9 at word 1 in memory
+            mcopy(0, 0x20, 0x20) // Copies 0x9 to word 0 in memory
+            x := mload(0) // Returns 32 bytes "0x9"
+        }
+        require(ArbSys(address(0x64)).arbOSVersion() == 55 + 32, "EXPECTED_ARBOS_32");
+    }
+}