diff --git a/src/mocks/ArbOS11To32UpgradeTest.sol b/src/mocks/ArbOS11To32UpgradeTest.sol
index 45df868c..6e8f3e55 100644
--- a/src/mocks/ArbOS11To32UpgradeTest.sol
+++ b/src/mocks/ArbOS11To32UpgradeTest.sol
@@ -9,9 +9,9 @@ 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"
+            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");
     }