diff --git a/.eslintrc.js b/.eslintrc.js
index ba6d577fe..5d5b120c1 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -10,7 +10,8 @@ module.exports = {
 
   env: {
     es6: true,
-    node: true
+    node: true,
+    mocha: true
   },
 
   plugins: ['vue'],
@@ -24,10 +25,6 @@ module.exports = {
     window: false
   },
 
-  env: {
-    mocha: true
-  },
-
   rules: {
     'accessor-pairs': 2,
     'arrow-spacing': [2, { 'before': true, 'after': true }],
diff --git a/test/unit/get-webpack-conf.js b/test/unit/get-webpack-conf.js
index e7a38aacc..73ecfcb6e 100644
--- a/test/unit/get-webpack-conf.js
+++ b/test/unit/get-webpack-conf.js
@@ -4,7 +4,7 @@ const to2 = require('2webpack2');
 const ProgressBarPlugin = require('progress-bar-webpack-plugin');
 const getPostcssPlugin = require('../../build/utils/postcss_pipe');
 
-let webpackConfig = {
+const webpackConfig = {
   output: {
     path: path.resolve(process.cwd(), 'dist'),
     publicPath: '/dist/',
@@ -129,4 +129,4 @@ let webpackConfig = {
   }
 };
 
-module.exports = to2(webpackConfig, {quiet: true, context: true});
+module.exports = to2(webpackConfig, { quiet: true, context: true });