diff --git a/lib/builder/builder.js b/lib/builder/builder.js
index b0abf7d154..763a4de4e2 100644
--- a/lib/builder/builder.js
+++ b/lib/builder/builder.js
@@ -63,7 +63,7 @@ export default class Builder {
 
   get plugins() {
     return _.uniqBy(
-      this.options.plugins.map((p, i) => {
+      this.options.plugins.map(p => {
         if (typeof p === 'string') p = { src: p }
         const pluginBaseName = path.basename(p.src, path.extname(p.src)).replace(
           /[^a-zA-Z?\d\s:]/g,
diff --git a/lib/core/middleware/nuxt.js b/lib/core/middleware/nuxt.js
index 254bc2ff0e..57918d1243 100644
--- a/lib/core/middleware/nuxt.js
+++ b/lib/core/middleware/nuxt.js
@@ -47,7 +47,7 @@ export default async function nuxtMiddleware(req, res, next) {
       const { shouldPush } = this.options.render.http2
       const { publicPath } = this.resources.clientManifest
 
-      preloadFiles.forEach(({ file, asType, fileWithoutQuery, extension }) => {
+      preloadFiles.forEach(({ file, asType, fileWithoutQuery }) => {
         // By default, we only preload scripts or css
         /* istanbul ignore if */
         if (!shouldPush && asType !== 'script' && asType !== 'style') {
diff --git a/lib/core/module.js b/lib/core/module.js
index 9e64265ddd..d9b6ea8565 100644
--- a/lib/core/module.js
+++ b/lib/core/module.js
@@ -139,7 +139,7 @@ export default class ModuleContainer {
       options = {}
     }
 
-    return new Promise((resolve, reject) => {
+    return new Promise(resolve => {
       // Call module with `this` context and pass options
       const result = handler.call(this, options)
 
diff --git a/test/fixtures/cli/cli.build.config.js b/test/fixtures/cli/cli.build.config.js
index ca159d392a..089715c295 100644
--- a/test/fixtures/cli/cli.build.config.js
+++ b/test/fixtures/cli/cli.build.config.js
@@ -2,7 +2,7 @@ import consola from 'consola'
 
 export default {
   hooks(hook) {
-    hook('build:done', builder => {
+    hook('build:done', () => {
       consola.success('Compiled successfully')
     })
     hook('listen', (server, { port, host }) => {