diff --git a/lib/builder/builder.js b/lib/builder/builder.js
index ea009bed77..5351c43453 100644
--- a/lib/builder/builder.js
+++ b/lib/builder/builder.js
@@ -11,7 +11,7 @@ const webpackDevMiddleware = require('webpack-dev-middleware')
 const webpackHotMiddleware = require('webpack-hot-middleware')
 const Debug = require('debug')
 const Glob = require('glob')
-const { r, wp, wChunk, createRoutes, sequence, relativeTo, waitFor, rmCache } = require('../common/utils')
+const { r, wp, wChunk, createRoutes, sequence, relativeTo, waitFor } = require('../common/utils')
 const { Options } = require('../common')
 const clientWebpackConfig = require('./webpack/client.config.js')
 const serverWebpackConfig = require('./webpack/server.config.js')
@@ -465,12 +465,6 @@ module.exports = class Builder {
           compiler.watch(this.options.watchers.webpack, (err) => {
             /* istanbul ignore if */
             if (err) return reject(err)
-            // not keep modified or deleted items in Vue.prototype
-            Object.keys(require.cache).forEach(key => {
-              if (!/(node_modules\/postcss)|(\.node$)/.test(key)) {
-                rmCache(key)
-              }
-            })
           })
         )
         return
diff --git a/lib/common/utils.js b/lib/common/utils.js
index 11b434b1d0..811809fc43 100644
--- a/lib/common/utils.js
+++ b/lib/common/utils.js
@@ -268,16 +268,3 @@ exports.createRoutes = function createRoutes(files, srcDir) {
   })
   return cleanChildrenRoutes(routes)
 }
-
-exports.rmCache = function rmCache(path) {
-  const mod = require.cache[path]
-  delete require.cache[path]
-  if (mod.parent && mod.parent.children) {
-    for (let i = 0; i < mod.parent.children.length; i++) {
-      if (mod.parent.children[i] === mod) {
-        mod.parent.children.splice(i, 1)
-        break
-      }
-    }
-  }
-}
diff --git a/test/basic.dev.test.js b/test/basic.dev.test.js
index 02d08993fa..a622fa9a03 100644
--- a/test/basic.dev.test.js
+++ b/test/basic.dev.test.js
@@ -1,14 +1,11 @@
 import test from 'ava'
 import { resolve } from 'path'
 import { intercept, release } from './helpers/console'
-import { Nuxt, Builder, Utils } from '..'
-import { truncateSync, readFileSync, writeFileSync } from 'fs'
+import { Nuxt, Builder } from '..'
 
 const port = 4001
 const url = (route) => 'http://localhost:' + port + route
 const rootDir = resolve(__dirname, 'fixtures/basic')
-const pluginPath = resolve(rootDir, 'plugins', 'watch.js')
-const pluginContent = readFileSync(pluginPath)
 
 let nuxt = null
 
@@ -24,10 +21,7 @@ test.serial('Init Nuxt.js', async t => {
       extractCSS: {
         allChunks: true
       }
-    },
-    plugins: [
-      '~/plugins/watch.js'
-    ]
+    }
   }
 
   const spies = await intercept({ log: true, stderr: true }, async () => {
@@ -49,31 +43,6 @@ test.serial('Init Nuxt.js', async t => {
 //   t.is(window.getComputedStyle(window.document.body).getPropertyValue('font-size'), '30px')
 // })
 
-test.serial('remove mixins in live reloading', async t => {
-  const spies = await intercept({ log: true, error: true, stderr: true })
-  await nuxt.renderRoute(url('/'))
-  t.true(spies.log.calledWith('I am mixin'))
-
-  truncateSync(pluginPath)
-  await new Promise(async (resolve, reject) => {
-    let waitTimes = 0
-    while (spies.log.neverCalledWithMatch(/Compiled successfully/)) {
-      if (waitTimes++ >= 20) {
-        t.fail('Dev server doesn\'t reload after 2000ms')
-        reject(Error())
-      }
-      await Utils.waitFor(100)
-    }
-    resolve()
-  })
-  spies.log.reset()
-
-  await nuxt.renderRoute(url('/'))
-  t.true(spies.log.neverCalledWith('I am mixin'))
-  t.is(spies.error.getCall(0).args[0].statusCode, 404)
-  release()
-})
-
 test.serial('/stateless', async t => {
   const spies = await intercept()
   const window = await nuxt.renderAndGetWindow(url('/stateless'))
@@ -94,6 +63,5 @@ test.serial('/stateless', async t => {
 
 // Close server and ask nuxt to stop listening to file changes
 test.after.always('Closing server and nuxt.js', async t => {
-  writeFileSync(pluginPath, pluginContent)
   await nuxt.close()
 })
diff --git a/test/fixtures/basic/plugins/watch.js b/test/fixtures/basic/plugins/watch.js
deleted file mode 100644
index b243a212ab..0000000000
--- a/test/fixtures/basic/plugins/watch.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import Vue from 'vue'
-
-const Plugin = {
-  install(Vue) {
-    Vue.mixin({
-      created() {
-        console.log('I am mixin') // eslint-disable-line no-console
-      }
-    })
-  }
-}
-Vue.use(Plugin)