diff --git a/lib/builder/builder.mjs b/lib/builder/builder.mjs
index 3263889670..aedfb2a2f2 100644
--- a/lib/builder/builder.mjs
+++ b/lib/builder/builder.mjs
@@ -18,8 +18,8 @@ import upath from 'upath'
 import { r, wp, wChunk, createRoutes, parallel, relativeTo, waitFor, createSpinner } from '../common/utils'
 import Options from '../common/options'
 
-import ClientWebpackConfig from './webpack/client.config'
-import ServerWebpackConfig from './webpack/server.config'
+import ClientWebpackConfig from './webpack/client'
+import ServerWebpackConfig from './webpack/server'
 
 const debug = Debug('nuxt:build')
 debug.color = 2 // Force green color
diff --git a/lib/builder/webpack/base.mjs b/lib/builder/webpack/base.mjs
index 9f8a312d34..eb36351840 100644
--- a/lib/builder/webpack/base.mjs
+++ b/lib/builder/webpack/base.mjs
@@ -168,8 +168,8 @@ export default class WebpackBaseConfig {
     // Hide warnings about plugins without a default export (#1179)
     plugins.push(new WarnFixPlugin())
 
+    // Build progress indicator
     if (!this.options.test) {
-      // Build progress indicator
       if (this.options.build.profile) {
         plugins.push(new webpack.ProgressPlugin({ profile: true }))
       } else {
@@ -181,11 +181,15 @@ export default class WebpackBaseConfig {
           }))
         }
       }
+    }
 
-      // Add stats plugin
+    // Add stats plugin
+    if (!this.options.dev) {
       plugins.push(new StatsPlugin(this.options.build.stats))
+    }
 
-      // Add friendly error plugin
+    // Add friendly error plugin
+    if (!this.options.dev && !this.options.test) {
       plugins.push(
         new FriendlyErrorsWebpackPlugin({
           clearConsole: true,
@@ -193,6 +197,7 @@ export default class WebpackBaseConfig {
         })
       )
     }
+
     return plugins
   }
 
diff --git a/lib/builder/webpack/client.mjs b/lib/builder/webpack/client.mjs
index 55eb74e4a7..adf8b463cd 100644
--- a/lib/builder/webpack/client.mjs
+++ b/lib/builder/webpack/client.mjs
@@ -6,7 +6,7 @@ import BundleAnalyzer from 'webpack-bundle-analyzer'
 import MiniCssExtractPlugin from 'mini-css-extract-plugin'
 
 import VueSSRClientPlugin from './plugins/vue/client'
-import BaseConfig from './base.config'
+import BaseConfig from './base'
 
 export default class WebpackClientConfig extends BaseConfig {
   constructor(builder) {
diff --git a/lib/builder/webpack/server.mjs b/lib/builder/webpack/server.mjs
index a0e9d6bc3b..f5a1334d0e 100644
--- a/lib/builder/webpack/server.mjs
+++ b/lib/builder/webpack/server.mjs
@@ -4,7 +4,7 @@ import fs from 'fs'
 import webpack from 'webpack'
 import nodeExternals from 'webpack-node-externals'
 
-import BaseConfig from './base.config'
+import BaseConfig from './base'
 import VueSSRServerPlugin from './plugins/vue/server'
 
 export default class WebpackServerConfig extends BaseConfig {
diff --git a/lib/builder/webpack/utils/postcss.mjs b/lib/builder/webpack/utils/postcss.mjs
index 9c3904aeb1..1ad9a6a17d 100644
--- a/lib/builder/webpack/utils/postcss.mjs
+++ b/lib/builder/webpack/utils/postcss.mjs
@@ -4,7 +4,7 @@ import path from 'path'
 import ـ from 'lodash'
 import createResolver from 'postcss-import-resolver'
 
-import { isPureObject } from '../../common/utils'
+import { isPureObject } from '../../../common/utils'
 
 export default function postcssConfig() {
   let config = ـ.cloneDeep(this.options.build.postcss)