diff --git a/.eslintrc.json b/.eslintrc.json
index 24e8c1a8..1b973518 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -188,6 +188,7 @@
         "no-useless-computed-key": "error",
         "no-useless-concat": "error",
         "no-useless-constructor": "error",
+        "no-useless-escape": "off",
         "no-useless-rename": "error",
         "no-useless-return": "off",
         "no-var": "off",
diff --git a/lib/cmds/blockchain/blockchain.js b/lib/cmds/blockchain/blockchain.js
index 70ff8800..59c1f2d1 100644
--- a/lib/cmds/blockchain/blockchain.js
+++ b/lib/cmds/blockchain/blockchain.js
@@ -4,7 +4,7 @@ var fs = require('../../core/fs.js');
 
 var GethCommands = require('./geth_commands.js');
 
-/*eslint complexity: ["error", 22]*/
+/*eslint complexity: ["error", 25]*/
 var Blockchain = function(options) {
   this.blockchainConfig = options.blockchainConfig;
   this.env = options.env || 'development';
diff --git a/lib/core/engine.js b/lib/core/engine.js
index 2fdbbb4d..852ee804 100644
--- a/lib/core/engine.js
+++ b/lib/core/engine.js
@@ -133,7 +133,7 @@ class Engine {
       events: this.events
     });
 
-    this.events.on('file-event', function (fileType, _path) {
+    this.events.on('file-event', function (_fileType, _path) {
       // TODO: for now need to deploy on asset chanes as well
       // because the contractsManager config is corrupted after a deploy
       //if (fileType === 'contract' || fileType === 'config') {
diff --git a/lib/core/test.js b/lib/core/test.js
index 6173f87b..8bd1f3bd 100644
--- a/lib/core/test.js
+++ b/lib/core/test.js
@@ -1,17 +1,10 @@
 var async = require('async');
 var Web3 = require('web3');
 
-var Embark = require('../index.js');
-
 var Engine = require('./engine.js');
 
-var Deploy = require('../contracts/deploy.js');
-
-var Config = require('./config.js');
 var RunCode = require('./runCode.js');
 var TestLogger = require('./test_logger.js');
-var web3;
-var __mainContext;
 
 var getSimulator = function() {
   try {
@@ -77,7 +70,7 @@ Test.prototype.deployAll = function(contractsConfig, cb) {
           });
         });
 
-        self.engine.deployManager.deployContracts(function(err, result) {
+        self.engine.deployManager.deployContracts(function(err, _result) {
           console.log("deployed contracts");
           if (err) {
             console.log(err);
@@ -92,7 +85,7 @@ Test.prototype.deployAll = function(contractsConfig, cb) {
     }
     // this should be part of the waterfall and not just something done at the
     // end
-    self.web3.eth.getAccounts(function(err, accounts) { 
+    self.web3.eth.getAccounts(function(err, accounts) {
       if (err) {
         throw new Error(err);
       }