diff --git a/test/e2e/ERC20Mintable.sol b/test/e2e/ERC20Mintable.sol
index 738e153d..f425fbc3 100644
--- a/test/e2e/ERC20Mintable.sol
+++ b/test/e2e/ERC20Mintable.sol
@@ -9,4 +9,8 @@ contract ERC20Mintable is ERC20 {
     function mint(address account, uint256 amount) external {
         _mint(account, amount);
     }
+
+    function burn(uint256 amount) external {
+        _burn(msg.sender, amount);
+    }
 }
diff --git a/test/e2e/Helper.sol b/test/e2e/Helper.sol
index b501e491..9d768bfd 100644
--- a/test/e2e/Helper.sol
+++ b/test/e2e/Helper.sol
@@ -27,6 +27,7 @@ interface IAuthorizer {
 
 interface IERC20Mintable is IERC20 {
     function mint(address, uint256) external;
+    function burn(uint256) external;
 }
 
 contract Harness is GPv2Settlement {