diff --git a/contracts/test/ERC20Mock.sol b/contracts/test/ERC20Mock.sol
index 216f4eb9..07ec5e48 100644
--- a/contracts/test/ERC20Mock.sol
+++ b/contracts/test/ERC20Mock.sol
@@ -1,284 +1,12 @@
 // SPDX-License-Identifier: MIT
-// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)
-
 pragma solidity ^0.8.12;
 
-import "@openzeppelin/contracts/interfaces/IERC20.sol";
-import "@openzeppelin/contracts/utils/Context.sol";
-
-/**
- * @dev Implementation of the {IERC20} interface.
- *
- * This implementation is agnostic to the way tokens are created. This means
- * that a supply mechanism has to be added in a derived contract using {_mint}.
- * For a generic mechanism see {ERC20PresetMinterPauser}.
- *
- * TIP: For a detailed writeup see our guide
- * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
- * to implement supply mechanisms].
- *
- * The default value of {decimals} is 18. To change this, you should override
- * this function so it returns a different value.
- *
- * We have followed general OpenZeppelin Contracts guidelines: functions revert
- * instead returning `false` on failure. This behavior is nonetheless
- * conventional and does not conflict with the expectations of ERC20
- * applications.
- *
- * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
- * This allows applications to reconstruct the allowance for all accounts just
- * by listening to said events. Other implementations of the EIP may not emit
- * these events, as it isn't required by the specification.
- *
- * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
- * functions have been added to mitigate the well-known issues around setting
- * allowances. See {IERC20-approve}.
- */
-contract ERC20Mock is Context, IERC20 {
-    mapping(address => uint256) private _balances;
-
-    mapping(address => mapping(address => uint256)) private _allowances;
-
-    uint256 private _totalSupply;
-
-    function decimals() public pure returns (uint256) {
-        return 18;
-    }
-
-    /**
-     * @dev See {IERC20-totalSupply}.
-     */
-    function totalSupply() public view virtual override returns (uint256) {
-        return _totalSupply;
-    }
-
-    /**
-     * @dev See {IERC20-balanceOf}.
-     */
-    function balanceOf(
-        address account
-    ) public view virtual override returns (uint256) {
-        return _balances[account];
-    }
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
 
+contract ERC20Mock is ERC20 {
+    constructor() ERC20("", "") {}
+    
     function mint(address account, uint256 amount) public {
         _mint(account, amount);
     }
-
-    /**
-     * @dev See {IERC20-transfer}.
-     *
-     * Requirements:
-     *
-     * - `to` cannot be the zero address.
-     * - the caller must have a balance of at least `amount`.
-     */
-    function transfer(address to, uint256 amount) public virtual override returns (bool) {
-        address owner = _msgSender();
-        _transfer(owner, to, amount);
-        return true;
-    }
-
-    /**
-     * @dev See {IERC20-allowance}.
-     */
-    function allowance(
-        address owner,
-        address spender
-    ) public view virtual override returns (uint256) {
-        return _allowances[owner][spender];
-    }
-
-    /**
-     * @dev See {IERC20-approve}.
-     *
-     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
-     * `transferFrom`. This is semantically equivalent to an infinite approval.
-     *
-     * Requirements:
-     *
-     * - `spender` cannot be the zero address.
-     */
-    function approve(
-        address, /*spender*/
-        uint256 /*amount*/
-    ) public virtual override returns (bool) {
-        return true;
-    }
-
-    /**
-     * @dev See {IERC20-transferFrom}.
-     *
-     * Emits an {Approval} event indicating the updated allowance. This is not
-     * required by the EIP. See the note at the beginning of {ERC20}.
-     *
-     * NOTE: Does not update the allowance if the current allowance
-     * is the maximum `uint256`.
-     *
-     * Requirements:
-     *
-     * - `from` and `to` cannot be the zero address.
-     * - `from` must have a balance of at least `amount`.
-     * - the caller must have allowance for ``from``'s tokens of at least
-     * `amount`.
-     */
-    function transferFrom(
-        address from,
-        address to,
-        uint256 amount
-    ) public virtual override returns (bool) {
-        _transfer(from, to, amount);
-        return true;
-    }
-
-    /**
-     * @dev Moves `amount` of tokens from `from` to `to`.
-     *
-     * This internal function is equivalent to {transfer}, and can be used to
-     * e.g. implement automatic token fees, slashing mechanisms, etc.
-     *
-     * Emits a {Transfer} event.
-     *
-     * Requirements:
-     *
-     * - `from` cannot be the zero address.
-     * - `to` cannot be the zero address.
-     * - `from` must have a balance of at least `amount`.
-     */
-    function _transfer(address from, address to, uint256 amount) internal virtual {
-        require(from != address(0), "ERC20: transfer from the zero address");
-        require(to != address(0), "ERC20: transfer to the zero address");
-
-        _beforeTokenTransfer(from, to, amount);
-
-        require(_balances[from] >= amount, "ERC20: transfer amount exceeds balance");
-        unchecked {
-            _balances[from] = _balances[from] - amount;
-            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
-            // decrementing then incrementing.
-            _balances[to] += amount;
-        }
-
-        emit Transfer(from, to, amount);
-
-        _afterTokenTransfer(from, to, amount);
-    }
-
-    /**
-     * @dev Creates `amount` tokens and assigns them to `account`, increasing
-     * the total supply.
-     *
-     * Emits a {Transfer} event with `from` set to the zero address.
-     *
-     * Requirements:
-     *
-     * - `account` cannot be the zero address.
-     */
-    function _mint(address account, uint256 amount) internal virtual {
-        require(account != address(0), "ERC20: mint to the zero address");
-
-        _totalSupply += amount;
-        unchecked {
-            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
-            _balances[account] += amount;
-        }
-        emit Transfer(address(0), account, amount);
-    }
-
-    /**
-     * @dev Destroys `amount` tokens from `account`, reducing the
-     * total supply.
-     *
-     * Emits a {Transfer} event with `to` set to the zero address.
-     *
-     * Requirements:
-     *
-     * - `account` cannot be the zero address.
-     * - `account` must have at least `amount` tokens.
-     */
-    function _burn(address account, uint256 amount) internal virtual {
-        require(account != address(0), "ERC20: burn from the zero address");
-
-        _beforeTokenTransfer(account, address(0), amount);
-
-        uint256 accountBalance = _balances[account];
-        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
-        unchecked {
-            _balances[account] = accountBalance - amount;
-            // Overflow not possible: amount <= accountBalance <= totalSupply.
-            _totalSupply -= amount;
-        }
-
-        emit Transfer(account, address(0), amount);
-
-        _afterTokenTransfer(account, address(0), amount);
-    }
-
-    /**
-     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
-     *
-     * This internal function is equivalent to `approve`, and can be used to
-     * e.g. set automatic allowances for certain subsystems, etc.
-     *
-     * Emits an {Approval} event.
-     *
-     * Requirements:
-     *
-     * - `owner` cannot be the zero address.
-     * - `spender` cannot be the zero address.
-     */
-    function _approve(address owner, address spender, uint256 amount) internal virtual {
-        require(owner != address(0), "ERC20: approve from the zero address");
-        require(spender != address(0), "ERC20: approve to the zero address");
-
-        _allowances[owner][spender] = amount;
-        emit Approval(owner, spender, amount);
-    }
-
-    /**
-     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
-     *
-     * Does not update the allowance amount in case of infinite allowance.
-     * Revert if not enough allowance is available.
-     *
-     * Might emit an {Approval} event.
-     */
-    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
-        uint256 currentAllowance = allowance(owner, spender);
-        if (currentAllowance != type(uint256).max) {
-            require(currentAllowance >= amount, "ERC20: insufficient allowance");
-        }
-    }
-
-    /**
-     * @dev Hook that is called before any transfer of tokens. This includes
-     * minting and burning.
-     *
-     * Calling conditions:
-     *
-     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
-     * will be transferred to `to`.
-     * - when `from` is zero, `amount` tokens will be minted for `to`.
-     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
-     * - `from` and `to` are never both zero.
-     *
-     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
-     */
-    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
-
-    /**
-     * @dev Hook that is called after any transfer of tokens. This includes
-     * minting and burning.
-     *
-     * Calling conditions:
-     *
-     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
-     * has been transferred to `to`.
-     * - when `from` is zero, `amount` tokens have been minted for `to`.
-     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
-     * - `from` and `to` are never both zero.
-     *
-     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
-     */
-    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
 }