Some changes

src/WormholeL1ERC20Bridge.sol

@@ -83,7 +83,7 @@ contract WormholeL1ERC20Bridge is WormholeL1VotePool, WormholeSender, WormholeRe
       L2_TOKEN_ADDRESS,
       mintCalldata,
       0, // no receiver value needed since we're just passing a message
-      GAS_LIMIT,
+      gasLimit,
       REFUND_CHAIN,
       msg.sender
     );

src/WormholeL1GovernorMetadataBridge.sol

@@ -72,7 +72,7 @@ contract WormholeL1GovernorMetadataBridge is WormholeSender {
       L2_GOVERNOR_ADDRESS,
       proposalCalldata,
       0, // no receiver value needed since we're just passing a message
-      GAS_LIMIT,
+      gasLimit,
       REFUND_CHAIN,
       msg.sender
     );

src/WormholeL2ERC20.sol

@@ -108,7 +108,7 @@ contract WormholeL2ERC20 is ERC20Votes, WormholeReceiver, WormholeSender {
       L1_BRIDGE_ADDRESS,
       withdrawCalldata,
       0, // no receiver value needed since we're just passing a message
-      GAS_LIMIT,
+      gasLimit,
       REFUND_CHAIN,
       msg.sender
     );

src/WormholeL2VoteAggregator.sol

@@ -36,7 +36,7 @@ contract WormholeL2VoteAggregator is WormholeSender, L2VoteAggregator, WormholeL
       L1_BRIDGE_ADDRESS,
       proposalCalldata,
       0, // no receiver value needed since we're just passing a message
-      GAS_LIMIT,
+      gasLimit,
       REFUND_CHAIN,
       msg.sender
     );

src/WormholeSender.sol

@@ -11,7 +11,13 @@ abstract contract WormholeSender is WormholeBase {
   uint16 public immutable REFUND_CHAIN;
 
   /// @notice The gas limit for cross chain transactions.
-  uint256 public GAS_LIMIT = 200_000;
+  uint256 public gasLimit = 200_000;
+
+  /// @notice Emitted when the gas limit has been updated
+  /// @param oldValue The old gas limit value.
+  /// @param newValue The new gas limit value.
+  /// @param caller The address changing the gas limit.
+  event GasLimitUpdate(uint256 oldValue, uint256 newValue, address caller);
 
   /// @param _refundChain The chain id of the chain sending the messages.
   /// @param _targetChain The chain id of the chain receiving the messages.
@@ -22,12 +28,13 @@ abstract contract WormholeSender is WormholeBase {
 
   /// @param targetChain The chain id of the chain receiving the messages.
   function quoteDeliveryCost(uint16 targetChain) public view virtual returns (uint256 cost) {
-    (cost,) = WORMHOLE_RELAYER.quoteEVMDeliveryPrice(targetChain, 0, GAS_LIMIT);
+    (cost,) = WORMHOLE_RELAYER.quoteEVMDeliveryPrice(targetChain, 0, gasLimit);
   }
 
-  /// @param gasLimit The new gas limit value which is used to estimate the delivery cost for
+  /// @param _gasLimit The new gas limit value which is used to estimate the delivery cost for
   /// sending messages cross chain.
-  function updateGasLimit(uint256 gasLimit) public onlyOwner {
-    GAS_LIMIT = gasLimit;
+  function updateGasLimit(uint256 _gasLimit) public onlyOwner {
+    emit GasLimitUpdate(gasLimit, _gasLimit, msg.sender);
+    gasLimit = _gasLimit;
   }
 }

test/WormholeBase.t.sol

@@ -7,11 +7,12 @@ import {WormholeBase} from "src/WormholeBase.sol";
 import {TestConstants} from "test/Constants.sol";
 
 contract Constructor is Test, TestConstants {
-  function testForkFuzz_CorrectlySetsAllArgs(address _wormholeRelayer) public {
-    WormholeBase base = new WormholeBase(_wormholeRelayer, msg.sender);
+  function testForkFuzz_CorrectlySetsAllArgs(address _wormholeRelayer, address _owner) public {
+    WormholeBase base = new WormholeBase(_wormholeRelayer, _owner);
 
     assertEq(
       address(base.WORMHOLE_RELAYER()), _wormholeRelayer, "Wormhole relayer is not set correctly"
     );
+    assertEq(address(base.owner()), _owner, "Contract ownewr is incorrect");
   }
 }

test/WormholeSender.t.sol

@@ -23,6 +23,8 @@ contract WormholeSenderHarness is WormholeSender {
 contract WormholeSenderTest is TestConstants, WormholeRelayerBasicTest {
   WormholeSender wormholeSender;
 
+  event GasLimitUpdate(uint256 oldValue, uint256 newValue, address caller);
+
   constructor() {
     setForkChains(TESTNET, L1_CHAIN.wormholeChainId, L2_CHAIN.wormholeChainId);
   }
@@ -64,7 +66,15 @@ contract QuoteDeliveryCost is WormholeSenderTest {
 
 contract UpdateGasLimit is WormholeSenderTest {
   function testFuzz_CorrectlyUpdateGasLimit(uint256 gasLimit) public {
+    vm.expectEmit();
+    emit GasLimitUpdate(200_000, gasLimit, address(this));
+
+    wormholeSender.updateGasLimit(gasLimit);
+    assertEq(wormholeSender.gasLimit(), gasLimit, "The gas limit is incorrect");
+  }
+
+  function testFuzz_RevertIf_CalledByNonOwner(address owner, uint256 gasLimit) public {
+    vm.prank(owner);
     wormholeSender.updateGasLimit(gasLimit);
-    assertEq(wormholeSender.GAS_LIMIT(), gasLimit, "The gas limit is incorrect");
   }
 }