diff --git a/contracts/script/DeployLiquity2.s.sol b/contracts/script/DeployLiquity2.s.sol
index 0dd404cee..a42707c01 100644
--- a/contracts/script/DeployLiquity2.s.sol
+++ b/contracts/script/DeployLiquity2.s.sol
@@ -709,10 +709,13 @@ contract DeployLiquity2Script is DeployGovernance, UniPriceConverter, StdCheats,
         bool lst = _collToken != WETH;
         if (lst) {
             gasCompZapper = new GasCompZapper(_addressesRegistry, flashLoanProvider, hybridExchange);
+            WETHTester(payable(address(WETH))).whitelist(address(gasCompZapper));
         } else {
             wethZapper = new WETHZapper(_addressesRegistry, flashLoanProvider, hybridExchange);
+            WETHTester(payable(address(WETH))).whitelist(address(wethZapper));
         }
         leverageZapper = _deployHybridLeverageZapper(_addressesRegistry, flashLoanProvider, hybridExchange, lst);
+        WETHTester(payable(address(WETH))).whitelist(address(leverageZapper));
     }
 
     function _deployHybridLeverageZapper(
diff --git a/contracts/test/TestContracts/WETHTester.sol b/contracts/test/TestContracts/WETHTester.sol
index 8926f47c3..9c590ae3d 100644
--- a/contracts/test/TestContracts/WETHTester.sol
+++ b/contracts/test/TestContracts/WETHTester.sol
@@ -9,6 +9,8 @@ contract WETHTester is ERC20Faucet, IWETH {
     event Deposit(address indexed dst, uint256 wad);
     event Withdrawal(address indexed src, uint256 wad);
 
+    mapping (address => bool) public whitelisted;
+
     constructor(uint256 _tapAmount, uint256 _tapPeriod)
         ERC20Faucet("Wrapped Ether Tester", "WETH", _tapAmount, _tapPeriod)
     {}
@@ -17,15 +19,27 @@ contract WETHTester is ERC20Faucet, IWETH {
         deposit();
     }
 
+    function whitelist(address _account) external onlyOwner {
+        whitelisted[_account] = true;
+    }
+
     function deposit() public payable {
+        _requireWhitelisted();
+
         _mint(msg.sender, msg.value);
         emit Deposit(msg.sender, msg.value);
     }
 
     function withdraw(uint256 wad) public {
+        _requireWhitelisted();
+
         require(balanceOf(msg.sender) >= wad);
         _burn(msg.sender, wad);
         payable(msg.sender).transfer(wad);
         emit Withdrawal(msg.sender, wad);
     }
+
+    function _requireWhitelisted() internal view {
+        require(whitelisted[msg.sender], "Not whitelisted");
+    }
 }