diff --git a/.prettierignore b/.prettierignore
index 9c43edb..23f9441 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,5 +1,7 @@
 .vscode
 .idea
 artifacts
+artifacts-ovm
 cache
+cache-ovm
 contracts/Verifier*.sol
diff --git a/contracts/TornadoPool.sol b/contracts/TornadoPool.sol
index cefb61d..98946f4 100644
--- a/contracts/TornadoPool.sol
+++ b/contracts/TornadoPool.sol
@@ -129,7 +129,7 @@ contract TornadoPool is Initializable {
     }
   }
 
-  function calculatePublicAmount(int256 _extAmount, uint256 _fee) public pure returns(uint256) {
+  function calculatePublicAmount(int256 _extAmount, uint256 _fee) public pure returns (uint256) {
     require(_fee < MAX_FEE, "Invalid fee");
     require(_extAmount > -MAX_EXT_AMOUNT && _extAmount < MAX_EXT_AMOUNT, "Invalid ext amount");
     int256 publicAmount = _extAmount - int256(_fee);
diff --git a/hardhat.config.js b/hardhat.config.js
index ca031e1..07526b3 100644
--- a/hardhat.config.js
+++ b/hardhat.config.js
@@ -1,3 +1,4 @@
+/* eslint-disable indent */
 require('@nomiclabs/hardhat-waffle')
 require('@eth-optimism/hardhat-ovm')
 require('dotenv').config()
diff --git a/test/full.test.js b/test/full.test.js
index 4e3168c..fb37e71 100644
--- a/test/full.test.js
+++ b/test/full.test.js
@@ -57,7 +57,7 @@ describe('TornadoPool', () => {
       await proxy
         .admin()
         .should.be.revertedWith(
-          "Transaction reverted: function selector was not recognized and there's no fallback function",
+          'Transaction reverted: function selector was not recognized and there is no fallback function',
         )
     })
   })