diff --git a/.babelrc b/.babelrc
deleted file mode 100644
index 4e81d06fe..000000000
--- a/.babelrc
+++ /dev/null
@@ -1,4 +0,0 @@
-{
-  "presets": ["env"],
-  "retainLines": true
-}
diff --git a/gruntfile.js b/gruntfile.js
index e92844ff4..0a1b6f1ce 100644
--- a/gruntfile.js
+++ b/gruntfile.js
@@ -31,7 +31,6 @@ module.exports = function (grunt) {
     },
     mochaTest: {
       options: {
-        require: 'babel-register',
         reporter: 'dot',
         ui: 'bdd',
         quiet: false,
diff --git a/lib/file-list.js b/lib/file-list.js
index 2645e855b..726c920ae 100644
--- a/lib/file-list.js
+++ b/lib/file-list.js
@@ -7,9 +7,6 @@
 // Dependencies
 // ------------
 
-var Map = require('core-js/library/fn/map')
-var Set = require('core-js/library/fn/set')
-var from = require('core-js/library/fn/array/from')
 var Promise = require('bluebird')
 var mm = require('minimatch')
 var Glob = require('glob').Glob
@@ -120,7 +117,7 @@ List.prototype._findFile = function (path, pattern) {
   if (!path || !pattern) return
   if (!this.buckets.has(pattern.pattern)) return
 
-  return _.find(from(this.buckets.get(pattern.pattern)), function (file) {
+  return _.find(Array.from(this.buckets.get(pattern.pattern)), function (file) {
     return file.originalPath === path
   })
 }
@@ -229,7 +226,7 @@ Object.defineProperty(List.prototype, 'files', {
     }
 
     var expandPattern = function (p) {
-      return from(self.buckets.get(p.pattern) || []).sort(byPath)
+      return Array.from(self.buckets.get(p.pattern) || []).sort(byPath)
     }
 
     var served = this._patterns.filter(function (pattern) {
diff --git a/lib/middleware/source_files.js b/lib/middleware/source_files.js
index 58a558c1c..46fbfe0c6 100644
--- a/lib/middleware/source_files.js
+++ b/lib/middleware/source_files.js
@@ -1,4 +1,3 @@
-var from = require('core-js/library/fn/array/from')
 var querystring = require('querystring')
 var _ = require('lodash')
 
@@ -8,7 +7,7 @@ var log = logger.create('middleware:source-files')
 
 // Files is a Set
 var findByPath = function (files, path) {
-  return _.find(from(files), function (file) {
+  return _.find(Array.from(files), function (file) {
     return file.path === path
   })
 }
diff --git a/lib/reporter.js b/lib/reporter.js
index 75d7bb5a6..546571db6 100644
--- a/lib/reporter.js
+++ b/lib/reporter.js
@@ -1,7 +1,6 @@
 var util = require('util')
 var resolve = require('url').resolve
 var SourceMapConsumer = require('source-map').SourceMapConsumer
-var WeakMap = require('core-js/es6/weak-map')
 var _ = require('lodash')
 
 var log = require('./logger').create('reporter')
diff --git a/package.json b/package.json
index c8b75e441..c6faad3a1 100644
--- a/package.json
+++ b/package.json
@@ -358,8 +358,6 @@
   "devDependencies": {
     "LiveScript": "^1.3.0",
     "babel-core": "^6.26.0",
-    "babel-preset-env": "^1.6.1",
-    "babel-register": "^6.23.0",
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
     "chai-subset": "^1.2.2",
diff --git a/test/unit/cli.spec.js b/test/unit/cli.spec.js
index a48707776..04744d96d 100644
--- a/test/unit/cli.spec.js
+++ b/test/unit/cli.spec.js
@@ -1,8 +1,10 @@
-import cli from '../../lib/cli'
-import optimist from 'optimist'
-import path from 'path'
-import constant from '../../lib/constants'
-import mocks from 'mocks'
+var optimist = require('optimist')
+var path = require('path')
+var mocks = require('mocks')
+
+var cli = require('../../lib/cli')
+var constant = require('../../lib/constants')
+
 var loadFile = mocks.loadFile
 
 describe('cli', () => {
diff --git a/test/unit/config.spec.js b/test/unit/config.spec.js
index 429aa76e4..f9cae34f8 100644
--- a/test/unit/config.spec.js
+++ b/test/unit/config.spec.js
@@ -1,4 +1,4 @@
-import path from 'path'
+var path = require('path')
 var loadFile = require('mocks').loadFile
 var helper = require('../../lib/helper')
 var logger = require('../../lib/logger.js')
@@ -421,7 +421,9 @@ describe('config', () => {
   describe('custom', () => {
     var di = require('di')
 
-    var forwardArgsFactory = (args) => args
+    var forwardArgsFactory = function (args) {
+      return args
+    }
 
     var baseModule = {
       'preprocessor:base': ['type', forwardArgsFactory],
diff --git a/test/unit/emitter_wrapper.spec.js b/test/unit/emitter_wrapper.spec.js
index 1692ebac8..d8aecce8c 100644
--- a/test/unit/emitter_wrapper.spec.js
+++ b/test/unit/emitter_wrapper.spec.js
@@ -1,5 +1,6 @@
-import EmitterWrapper from '../../lib/emitter_wrapper'
-import {EventEmitter} from 'events'
+var EventEmitter = require('events').EventEmitter
+
+var EmitterWrapper = require('../../lib/emitter_wrapper')
 
 describe('emitter_wrapper', () => {
   var emitter
diff --git a/test/unit/file-list.spec.js b/test/unit/file-list.spec.js
index 49bf6c8d9..9a6ad1af0 100644
--- a/test/unit/file-list.spec.js
+++ b/test/unit/file-list.spec.js
@@ -1,23 +1,24 @@
-import Promise from 'bluebird'
-import {EventEmitter} from 'events'
-import mocks from 'mocks'
-import proxyquire from 'proxyquire'
-import pathLib from 'path'
-import _ from 'lodash'
-import from from 'core-js/library/fn/array/from'
+var Promise = require('bluebird')
+var EventEmitter = require('events').EventEmitter
+var mocks = require('mocks')
+var proxyquire = require('proxyquire')
+var pathLib = require('path')
+var _ = require('lodash')
 
-import helper from '../../lib/helper'
-import config from '../../lib/config'
+var helper = require('../../lib/helper')
+var config = require('../../lib/config')
 
 // create an array of pattern objects from given strings
-var patterns = (...strings) => strings.map((str) => new config.Pattern(str))
+var patterns = function () {
+  return Array.from(arguments).map((str) => new config.Pattern(str))
+}
 
 function pathsFrom (files) {
-  return _.map(from(files), 'path')
+  return _.map(Array.from(files), 'path')
 }
 
 function findFile (path, files) {
-  return from(files).find((file) => file.path === path)
+  return Array.from(files).find((file) => file.path === path)
 }
 
 var PATTERN_LIST = {
@@ -71,10 +72,12 @@ describe('FileList', () => {
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       List = proxyquire('../../lib/file-list', {
@@ -201,10 +204,12 @@ describe('FileList', () => {
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       List = proxyquire('../../lib/file-list', {
@@ -238,10 +243,12 @@ describe('FileList', () => {
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       List = proxyquire('../../lib/file-list', {
@@ -430,10 +437,12 @@ describe('FileList', () => {
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       clock = sinon.useFakeTimers()
@@ -557,10 +566,12 @@ describe('FileList', () => {
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       clock = sinon.useFakeTimers()
@@ -664,10 +675,12 @@ describe('FileList', () => {
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       clock = sinon.useFakeTimers()
@@ -739,16 +752,18 @@ describe('FileList', () => {
     beforeEach(() => {
       patternList = PATTERN_LIST
       mg = MG
-      Promise.setScheduler((fn) => fn())
+      Promise.setScheduler(function (fn) { fn() })
 
       preprocess = sinon.spy((file, done) => process.nextTick(done))
       emitter = new EventEmitter()
 
       glob = {
-        Glob: (pattern, opts) => ({
-          found: patternList[pattern],
-          statCache: mg.statCache
-        })
+        Glob: function (pattern, opts) {
+          return {
+            found: patternList[pattern],
+            statCache: mg.statCache
+          }
+        }
       }
 
       modified = sinon.stub()
diff --git a/test/unit/helper.spec.js b/test/unit/helper.spec.js
index 118e7e9b3..c937bb95d 100644
--- a/test/unit/helper.spec.js
+++ b/test/unit/helper.spec.js
@@ -1,4 +1,4 @@
-import path from 'path'
+var path = require('path')
 
 describe('helper', () => {
   var helper = require('../../lib/helper')
diff --git a/test/unit/init.spec.js b/test/unit/init.spec.js
index d38884b24..3bcdd0ef6 100644
--- a/test/unit/init.spec.js
+++ b/test/unit/init.spec.js
@@ -1,4 +1,5 @@
-import path from 'path'
+var path = require('path')
+
 describe('init', () => {
   var loadFile = require('mocks').loadFile
   var m = null
diff --git a/test/unit/init/formatters.spec.js b/test/unit/init/formatters.spec.js
index a311132f6..3a46667ca 100644
--- a/test/unit/init/formatters.spec.js
+++ b/test/unit/init/formatters.spec.js
@@ -1,4 +1,5 @@
-import formatters from '../../../lib/init/formatters'
+var formatters = require('../../../lib/init/formatters')
+
 describe('init/formatters', () => {
   var formatter
 
@@ -8,7 +9,8 @@ describe('init/formatters', () => {
     })
 
     describe('formatAnswers', () => {
-      var createAnswers = function (ans = {}) {
+      var createAnswers = function (ans) {
+        ans = ans || {}
         ans.frameworks = ans.frameworks || []
         ans.files = ans.files || []
         ans.onlyServedFiles = ans.onlyServedFiles || []
diff --git a/test/unit/init/state_machine.spec.js b/test/unit/init/state_machine.spec.js
index f2ab7ad0e..5bd620211 100644
--- a/test/unit/init/state_machine.spec.js
+++ b/test/unit/init/state_machine.spec.js
@@ -1,4 +1,4 @@
-import StateMachine from '../../../lib/init/state_machine'
+var StateMachine = require('../../../lib/init/state_machine')
 
 describe('init/StateMachine', () => {
   var done
diff --git a/test/unit/launcher.spec.js b/test/unit/launcher.spec.js
index aa3662599..8b69955d5 100644
--- a/test/unit/launcher.spec.js
+++ b/test/unit/launcher.spec.js
@@ -1,8 +1,9 @@
-import Promise from 'bluebird'
-import di from 'di'
-import events from '../../lib/events'
-import launcher from '../../lib/launcher'
-import createMockTimer from './mocks/timer'
+var Promise = require('bluebird')
+var di = require('di')
+
+var events = require('../../lib/events')
+var launcher = require('../../lib/launcher')
+var createMockTimer = require('./mocks/timer')
 
 // promise mock
 var stubPromise = (obj, method, stubAction) => {
@@ -17,48 +18,44 @@ var stubPromise = (obj, method, stubAction) => {
   })
 }
 
-class FakeBrowser {
-  constructor (id, name, baseBrowserDecorator) {
-    this.id = id
-    this.name = name
-    this.DEFAULT_CMD = {
-      linux: '/script',
-      darwin: '/script',
-      win32: 'script.exe'
-    }
-    this.ENV_CMD = 'SCRIPT_BIN'
-
-    baseBrowserDecorator(this)
-    FakeBrowser._instances.push(this)
-    sinon.stub(this, 'start').callsFake(() => {
-      this.state = this.STATE_BEING_CAPTURED
-      this._done()
-    })
-    stubPromise(this, 'forceKill')
-    sinon.stub(this, 'restart')
+function FakeBrowser (id, name, baseBrowserDecorator) {
+  this.id = id
+  this.name = name
+  this.DEFAULT_CMD = {
+    linux: '/script',
+    darwin: '/script',
+    win32: 'script.exe'
   }
+  this.ENV_CMD = 'SCRIPT_BIN'
+
+  baseBrowserDecorator(this)
+  FakeBrowser._instances.push(this)
+  sinon.stub(this, 'start').callsFake(() => {
+    this.state = this.STATE_BEING_CAPTURED
+    this._done()
+  })
+  stubPromise(this, 'forceKill')
+  sinon.stub(this, 'restart')
 }
 
-class ScriptBrowser {
-  constructor (id, name, baseBrowserDecorator) {
-    this.id = id
-    this.name = name
-    this.DEFAULT_CMD = {
-      linux: '/script',
-      darwin: '/script',
-      win32: 'script.exe'
-    }
-    this.ENV_CMD = 'SCRIPT_BIN'
-
-    baseBrowserDecorator(this)
-    ScriptBrowser._instances.push(this)
-    sinon.stub(this, 'start').callsFake(() => {
-      this.state = this.STATE_BEING_CAPTURED
-      this._done()
-    })
-    stubPromise(this, 'forceKill')
-    sinon.stub(this, 'restart')
+function ScriptBrowser (id, name, baseBrowserDecorator) {
+  this.id = id
+  this.name = name
+  this.DEFAULT_CMD = {
+    linux: '/script',
+    darwin: '/script',
+    win32: 'script.exe'
   }
+  this.ENV_CMD = 'SCRIPT_BIN'
+
+  baseBrowserDecorator(this)
+  ScriptBrowser._instances.push(this)
+  sinon.stub(this, 'start').callsFake(() => {
+    this.state = this.STATE_BEING_CAPTURED
+    this._done()
+  })
+  stubPromise(this, 'forceKill')
+  sinon.stub(this, 'restart')
 }
 
 describe('launcher', () => {
diff --git a/test/unit/launchers/base.spec.js b/test/unit/launchers/base.spec.js
index 8357770dc..89408defd 100644
--- a/test/unit/launchers/base.spec.js
+++ b/test/unit/launchers/base.spec.js
@@ -1,7 +1,7 @@
-import _ from 'lodash'
+var _ = require('lodash')
 
-import BaseLauncher from '../../../lib/launchers/base'
-import {EventEmitter} from '../../../lib/events'
+var BaseLauncher = require('../../../lib/launchers/base')
+var EventEmitter = require('../../../lib/events').EventEmitter
 
 describe('launchers/base.js', () => {
   var emitter
diff --git a/test/unit/launchers/capture_timeout.spec.js b/test/unit/launchers/capture_timeout.spec.js
index 636dfee1d..46e62debc 100644
--- a/test/unit/launchers/capture_timeout.spec.js
+++ b/test/unit/launchers/capture_timeout.spec.js
@@ -1,6 +1,6 @@
-import BaseLauncher from '../../../lib/launchers/base'
-import CaptureTimeoutLauncher from '../../../lib/launchers/capture_timeout'
-import createMockTimer from '../mocks/timer'
+var BaseLauncher = require('../../../lib/launchers/base')
+var CaptureTimeoutLauncher = require('../../../lib/launchers/capture_timeout')
+var createMockTimer = require('../mocks/timer')
 
 describe('launchers/capture_timeout.js', () => {
   var timer
diff --git a/test/unit/launchers/process.spec.js b/test/unit/launchers/process.spec.js
index f97c28907..746747007 100644
--- a/test/unit/launchers/process.spec.js
+++ b/test/unit/launchers/process.spec.js
@@ -1,12 +1,12 @@
-import path from 'path'
-import _ from 'lodash'
-
-import BaseLauncher from '../../../lib/launchers/base'
-import RetryLauncher from '../../../lib/launchers/retry'
-import CaptureTimeoutLauncher from '../../../lib/launchers/capture_timeout'
-import ProcessLauncher from '../../../lib/launchers/process'
-import {EventEmitter} from '../../../lib/events'
-import createMockTimer from '../mocks/timer'
+var path = require('path')
+var _ = require('lodash')
+
+var BaseLauncher = require('../../../lib/launchers/base')
+var RetryLauncher = require('../../../lib/launchers/retry')
+var CaptureTimeoutLauncher = require('../../../lib/launchers/capture_timeout')
+var ProcessLauncher = require('../../../lib/launchers/process')
+var EventEmitter = require('../../../lib/events').EventEmitter
+var createMockTimer = require('../mocks/timer')
 
 describe('launchers/process.js', () => {
   var emitter
diff --git a/test/unit/launchers/retry.spec.js b/test/unit/launchers/retry.spec.js
index 4129ec5b9..90bd69579 100644
--- a/test/unit/launchers/retry.spec.js
+++ b/test/unit/launchers/retry.spec.js
@@ -1,8 +1,8 @@
-import _ from 'lodash'
+var _ = require('lodash')
 
-import BaseLauncher from '../../../lib/launchers/base'
-import RetryLauncher from '../../../lib/launchers/retry'
-import {EventEmitter} from '../../../lib/events'
+var BaseLauncher = require('../../../lib/launchers/base')
+var RetryLauncher = require('../../../lib/launchers/retry')
+var EventEmitter = require('../../../lib/events').EventEmitter
 
 describe('launchers/retry.js', () => {
   var emitter
diff --git a/test/unit/logger.spec.js b/test/unit/logger.spec.js
index 917aa82ab..d3ea57fcd 100644
--- a/test/unit/logger.spec.js
+++ b/test/unit/logger.spec.js
@@ -1,12 +1,12 @@
-import {loadFile} from 'mocks'
-import path from 'path'
+var loadFile = require('mocks').loadFile
+var path = require('path')
 
 describe('logger', () => {
   var m
-  let configuration
+  var configuration
 
   beforeEach(() => {
-    const mockLog4Js = {
+    var mockLog4Js = {
       configure: function (config) {
         configuration = config
       }
diff --git a/test/unit/middleware/karma.spec.js b/test/unit/middleware/karma.spec.js
index 9804da6a0..633a92152 100644
--- a/test/unit/middleware/karma.spec.js
+++ b/test/unit/middleware/karma.spec.js
@@ -1,8 +1,9 @@
-import helper from '../../../lib/helper'
-import constants from '../../../lib/constants'
-import File from '../../../lib/file'
-import Url from '../../../lib/url'
-import mocks from 'mocks'
+var mocks = require('mocks')
+
+var helper = require('../../../lib/helper')
+var constants = require('../../../lib/constants')
+var File = require('../../../lib/file')
+var Url = require('../../../lib/url')
 
 var HttpResponseMock = mocks.http.ServerResponse
 var HttpRequestMock = mocks.http.ServerRequest
@@ -415,7 +416,7 @@ describe('middleware.karma', () => {
   })
 
   it('should update handle updated configs', (done) => {
-    let i = 0
+    var i = 0
     handler = createKarmaMiddleware(
       filesDeferred.promise,
       serveFile,
diff --git a/test/unit/middleware/proxy.spec.js b/test/unit/middleware/proxy.spec.js
index 9b81a27c8..73bb0f9f9 100644
--- a/test/unit/middleware/proxy.spec.js
+++ b/test/unit/middleware/proxy.spec.js
@@ -1,4 +1,4 @@
-import path from 'path'
+var path = require('path')
 var httpMock = require('mocks').http
 var loadFile = require('mocks').loadFile
 
diff --git a/test/unit/middleware/runner.spec.js b/test/unit/middleware/runner.spec.js
index e773f1c26..9a7985fb3 100644
--- a/test/unit/middleware/runner.spec.js
+++ b/test/unit/middleware/runner.spec.js
@@ -1,12 +1,14 @@
-import path from 'path'
-import {EventEmitter} from 'events'
-import mocks from 'mocks'
-import {Promise} from 'bluebird'
-import Browser from '../../../lib/browser'
-import BrowserCollection from '../../../lib/browser_collection'
-import MultReporter from '../../../lib/reporters/multi'
+var path = require('path')
+var EventEmitter = require('events').EventEmitter
+var mocks = require('mocks')
+var Promise = require('bluebird')
 var _ = require('lodash')
+
+var Browser = require('../../../lib/browser')
+var BrowserCollection = require('../../../lib/browser_collection')
+var MultReporter = require('../../../lib/reporters/multi')
 var createRunnerMiddleware = require('../../../lib/middleware/runner').create
+
 var HttpResponseMock = mocks.http.ServerResponse
 var HttpRequestMock = mocks.http.ServerRequest
 
diff --git a/test/unit/middleware/source_files.spec.js b/test/unit/middleware/source_files.spec.js
index 3d43751d5..92475d373 100644
--- a/test/unit/middleware/source_files.spec.js
+++ b/test/unit/middleware/source_files.spec.js
@@ -1,9 +1,10 @@
-import http from 'http'
-import mocks from 'mocks'
-import request from 'supertest'
-import helper from '../../../lib/helper'
-import File from '../../../lib/file'
-import {createServeFile} from '../../../lib/middleware/common'
+var http = require('http')
+var mocks = require('mocks')
+var request = require('supertest')
+
+var helper = require('../../../lib/helper')
+var File = require('../../../lib/file')
+var createServeFile = require('../../../lib/middleware/common').createServeFile
 var createSourceFilesMiddleware = require('../../../lib/middleware/source_files').create
 
 describe('middleware.source_files', function () {
diff --git a/test/unit/middleware/strip_host.spec.js b/test/unit/middleware/strip_host.spec.js
index 39681533a..5983e61c8 100644
--- a/test/unit/middleware/strip_host.spec.js
+++ b/test/unit/middleware/strip_host.spec.js
@@ -1,4 +1,4 @@
-import mocks from 'mocks'
+var mocks = require('mocks')
 
 describe('middleware.strip_host', function () {
   var nextSpy
diff --git a/test/unit/mocks/timer.js b/test/unit/mocks/timer.js
index 943201fd3..8abb35e9b 100644
--- a/test/unit/mocks/timer.js
+++ b/test/unit/mocks/timer.js
@@ -1,4 +1,4 @@
-import {Timer} from 'timer-shim'
+var Timer = require('timer-shim').Timer
 
 module.exports = function () {
   var timer = new Timer()
diff --git a/test/unit/preprocessor.spec.js b/test/unit/preprocessor.spec.js
index ccd488f3a..cddca6c68 100644
--- a/test/unit/preprocessor.spec.js
+++ b/test/unit/preprocessor.spec.js
@@ -1,7 +1,8 @@
-import mocks from 'mocks'
-import di from 'di'
-import path from 'path'
-import events from '../../lib/events'
+var mocks = require('mocks')
+var di = require('di')
+var path = require('path')
+
+var events = require('../../lib/events')
 
 describe('preprocessor', () => {
   var pp
@@ -39,7 +40,11 @@ describe('preprocessor', () => {
       done(null, 'new-content')
     })
 
-    var injector = new di.Injector([{'preprocessor:fake': ['factory', () => fakePreprocessor]}, emitterSetting])
+    var injector = new di.Injector([{
+      'preprocessor:fake': [
+        'factory', function () { return fakePreprocessor }
+      ]
+    }, emitterSetting])
     pp = m.createPreprocessor({'**/*.js': ['fake']}, null, injector)
 
     var file = {originalPath: '/some/a.js', path: 'path'}
@@ -58,7 +63,9 @@ describe('preprocessor', () => {
       done(null, 'new-content')
     })
 
-    var injector = new di.Injector([{'preprocessor:fake': ['factory', () => fakePreprocessor]}, emitterSetting])
+    var injector = new di.Injector([{
+      'preprocessor:fake': ['factory', function () { return fakePreprocessor } ]
+    }, emitterSetting])
     pp = m.createPreprocessor({'**/*.js': ['fake']}, null, injector)
 
     var file = {originalPath: '/some/.dir/a.js', path: 'path'}
@@ -77,7 +84,9 @@ describe('preprocessor', () => {
       done(null, 'new-content')
     })
 
-    var injector = new di.Injector([{'preprocessor:fake': ['factory', () => fakePreprocessor]}, emitterSetting])
+    var injector = new di.Injector([{
+      'preprocessor:fake': ['factory', function () { return fakePreprocessor }]
+    }, emitterSetting])
     var config = {'**/*.txt': ['fake']}
     pp = m.createPreprocessor(config, null, injector)
 
@@ -98,7 +107,9 @@ describe('preprocessor', () => {
       done(null, '')
     })
 
-    var injector = new di.Injector([{'preprocessor:fake': ['factory', () => fakePreprocessor]}, emitterSetting])
+    var injector = new di.Injector([{
+      'preprocessor:fake': ['factory', function () { return fakePreprocessor }]
+    }, emitterSetting])
     pp = m.createPreprocessor({'**/*.js': ['fake']}, null, injector)
 
     var file = {originalPath: '/some/a.txt', path: 'path'}
@@ -121,8 +132,8 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:fake1': ['factory', () => fakePreprocessor1],
-      'preprocessor:fake2': ['factory', () => fakePreprocessor2]
+      'preprocessor:fake1': ['factory', function () { return fakePreprocessor1 }],
+      'preprocessor:fake2': ['factory', function () { return fakePreprocessor2 }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({'**/*.js': ['fake1', 'fake2']}, null, injector)
@@ -166,7 +177,7 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:fake': ['factory', () => fakePreprocessor]
+      'preprocessor:fake': ['factory', function () { return fakePreprocessor }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({'**/a.js': ['fake']}, null, injector)
@@ -192,7 +203,7 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:failing': ['factory', () => failingPreprocessor]
+      'preprocessor:failing': ['factory', function () { return failingPreprocessor }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({'**/*.js': ['failing']}, null, injector)
@@ -215,8 +226,8 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:failing': ['factory', () => failingPreprocessor],
-      'preprocessor:fake': ['factory', () => fakePreprocessor]
+      'preprocessor:failing': ['factory', function () { return failingPreprocessor }],
+      'preprocessor:fake': ['factory', function () { return fakePreprocessor }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({'**/*.js': ['failing', 'fake']}, null, injector)
@@ -245,7 +256,7 @@ describe('preprocessor', () => {
       })
 
       var injector = new di.Injector([{
-        'preprocessor:fake': ['factory', () => fakePreprocessor]
+        'preprocessor:fake': ['factory', function () { return fakePreprocessor }]
       }, emitterSetting])
 
       var pp = m.createPreprocessor({'**/*.js': ['fake']}, null, injector)
@@ -283,7 +294,7 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:fake': ['factory', () => fakePreprocessor]
+      'preprocessor:fake': ['factory', function () { return fakePreprocessor }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({'**/*': ['fake']}, null, injector)
@@ -305,7 +316,7 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:fake': ['factory', () => fakePreprocessor]
+      'preprocessor:fake': ['factory', function () { fakePreprocessor }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({'**/*': ['fake']}, null, injector)
@@ -341,10 +352,10 @@ describe('preprocessor', () => {
     })
 
     var injector = new di.Injector([{
-      'preprocessor:fakeA': ['factory', () => fakePreprocessorA],
-      'preprocessor:fakeB': ['factory', () => fakePreprocessorB],
-      'preprocessor:fakeC': ['factory', () => fakePreprocessorC],
-      'preprocessor:fakeD': ['factory', () => fakePreprocessorD]
+      'preprocessor:fakeA': ['factory', function () { return fakePreprocessorA }],
+      'preprocessor:fakeB': ['factory', function () { return fakePreprocessorB }],
+      'preprocessor:fakeC': ['factory', function () { return fakePreprocessorC }],
+      'preprocessor:fakeD': ['factory', function () { return fakePreprocessorD }]
     }, emitterSetting])
 
     pp = m.createPreprocessor({
diff --git a/test/unit/reporter.spec.js b/test/unit/reporter.spec.js
index af344856b..cb8dd15c3 100644
--- a/test/unit/reporter.spec.js
+++ b/test/unit/reporter.spec.js
@@ -1,10 +1,12 @@
-import {EventEmitter} from 'events'
-import {loadFile} from 'mocks'
-import path from 'path'
-import _ from 'lodash'
-import sinon from 'sinon'
+'use strict'
 
-import File from '../../lib/file'
+var EventEmitter = require('events').EventEmitter
+var loadFile = require('mocks').loadFile
+var path = require('path')
+var _ = require('lodash')
+var sinon = require('sinon')
+
+var File = require('../../lib/file')
 
 describe('reporter', () => {
   var m
diff --git a/test/unit/reporters/base.spec.js b/test/unit/reporters/base.spec.js
index ed75037ad..38efff419 100644
--- a/test/unit/reporters/base.spec.js
+++ b/test/unit/reporters/base.spec.js
@@ -1,4 +1,4 @@
-import path from 'path'
+var path = require('path')
 
 describe('reporter', function () {
   var loadFile = require('mocks').loadFile
diff --git a/test/unit/runner.spec.js b/test/unit/runner.spec.js
index 98fcb2118..064be9aea 100644
--- a/test/unit/runner.spec.js
+++ b/test/unit/runner.spec.js
@@ -1,6 +1,7 @@
-import {loadFile} from 'mocks'
-import constant from '../../lib/constants'
-import path from 'path'
+var loadFile = require('mocks').loadFile
+var path = require('path')
+
+var constant = require('../../lib/constants')
 
 describe('runner', () => {
   var m
diff --git a/test/unit/server.spec.js b/test/unit/server.spec.js
index 248ad1f4b..c362f1aed 100644
--- a/test/unit/server.spec.js
+++ b/test/unit/server.spec.js
@@ -1,5 +1,5 @@
-import Server from '../../lib/server'
-import BrowserCollection from '../../lib/browser_collection'
+var Server = require('../../lib/server')
+var BrowserCollection = require('../../lib/browser_collection')
 
 describe('server', () => {
   var mockConfig
diff --git a/test/unit/watcher.spec.js b/test/unit/watcher.spec.js
index fb07f8d7e..a3bec71bd 100644
--- a/test/unit/watcher.spec.js
+++ b/test/unit/watcher.spec.js
@@ -1,5 +1,5 @@
-import mocks from 'mocks'
-import path from 'path'
+var mocks = require('mocks')
+var path = require('path')
 
 describe('watcher', () => {
   var config = require('../../lib/config')
diff --git a/test/unit/web-server.spec.js b/test/unit/web-server.spec.js
index ca7e1401e..d429e443c 100644
--- a/test/unit/web-server.spec.js
+++ b/test/unit/web-server.spec.js
@@ -1,11 +1,10 @@
-import 'core-js'
-import {EventEmitter} from 'events'
-import request from 'supertest'
-import di from 'di'
-import mocks from 'mocks'
-import fs from 'fs'
-import mime from 'mime'
-import path from 'path'
+var EventEmitter = require('events').EventEmitter
+var request = require('supertest')
+var di = require('di')
+var mocks = require('mocks')
+var fs = require('fs')
+var mime = require('mime')
+var path = require('path')
 
 describe('web-server', () => {
   var server
diff --git a/yarn.lock b/yarn.lock
index 2c50b7109..907d5637e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -408,100 +408,6 @@ babel-generator@^6.26.0:
     source-map "^0.5.6"
     trim-right "^1.0.1"
 
-babel-helper-builder-binary-assignment-operator-visitor@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-builder-binary-assignment-operator-visitor/-/babel-helper-builder-binary-assignment-operator-visitor-6.24.1.tgz#cce4517ada356f4220bcae8a02c2b346f9a56664"
-  dependencies:
-    babel-helper-explode-assignable-expression "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-helper-call-delegate@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz#ece6aacddc76e41c3461f88bfc575bd0daa2df8d"
-  dependencies:
-    babel-helper-hoist-variables "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
-babel-helper-define-map@^6.24.1:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-helper-define-map/-/babel-helper-define-map-6.26.0.tgz#a5f56dab41a25f97ecb498c7ebaca9819f95be5f"
-  dependencies:
-    babel-helper-function-name "^6.24.1"
-    babel-runtime "^6.26.0"
-    babel-types "^6.26.0"
-    lodash "^4.17.4"
-
-babel-helper-explode-assignable-expression@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-explode-assignable-expression/-/babel-helper-explode-assignable-expression-6.24.1.tgz#f25b82cf7dc10433c55f70592d5746400ac22caa"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
-babel-helper-function-name@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz#d3475b8c03ed98242a25b48351ab18399d3580a9"
-  dependencies:
-    babel-helper-get-function-arity "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
-babel-helper-get-function-arity@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-get-function-arity/-/babel-helper-get-function-arity-6.24.1.tgz#8f7782aa93407c41d3aa50908f89b031b1b6853d"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-helper-hoist-variables@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-hoist-variables/-/babel-helper-hoist-variables-6.24.1.tgz#1ecb27689c9d25513eadbc9914a73f5408be7a76"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-helper-optimise-call-expression@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-optimise-call-expression/-/babel-helper-optimise-call-expression-6.24.1.tgz#f7a13427ba9f73f8f4fa993c54a97882d1244257"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-helper-regex@^6.24.1:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-helper-regex/-/babel-helper-regex-6.26.0.tgz#325c59f902f82f24b74faceed0363954f6495e72"
-  dependencies:
-    babel-runtime "^6.26.0"
-    babel-types "^6.26.0"
-    lodash "^4.17.4"
-
-babel-helper-remap-async-to-generator@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-remap-async-to-generator/-/babel-helper-remap-async-to-generator-6.24.1.tgz#5ec581827ad723fecdd381f1c928390676e4551b"
-  dependencies:
-    babel-helper-function-name "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
-babel-helper-replace-supers@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-helper-replace-supers/-/babel-helper-replace-supers-6.24.1.tgz#bf6dbfe43938d17369a213ca8a8bf74b6a90ab1a"
-  dependencies:
-    babel-helper-optimise-call-expression "^6.24.1"
-    babel-messages "^6.23.0"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
 babel-helpers@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-helpers/-/babel-helpers-6.24.1.tgz#3471de9caec388e5c850e597e58a26ddf37602b2"
@@ -515,257 +421,7 @@ babel-messages@^6.23.0:
   dependencies:
     babel-runtime "^6.22.0"
 
-babel-plugin-check-es2015-constants@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-check-es2015-constants/-/babel-plugin-check-es2015-constants-6.22.0.tgz#35157b101426fd2ffd3da3f75c7d1e91835bbf8a"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-syntax-async-functions@^6.8.0:
-  version "6.13.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz#cad9cad1191b5ad634bf30ae0872391e0647be95"
-
-babel-plugin-syntax-exponentiation-operator@^6.8.0:
-  version "6.13.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-exponentiation-operator/-/babel-plugin-syntax-exponentiation-operator-6.13.0.tgz#9ee7e8337290da95288201a6a57f4170317830de"
-
-babel-plugin-syntax-trailing-function-commas@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-syntax-trailing-function-commas/-/babel-plugin-syntax-trailing-function-commas-6.22.0.tgz#ba0360937f8d06e40180a43fe0d5616fff532cf3"
-
-babel-plugin-transform-async-to-generator@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-async-to-generator/-/babel-plugin-transform-async-to-generator-6.24.1.tgz#6536e378aff6cb1d5517ac0e40eb3e9fc8d08761"
-  dependencies:
-    babel-helper-remap-async-to-generator "^6.24.1"
-    babel-plugin-syntax-async-functions "^6.8.0"
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-arrow-functions@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-arrow-functions/-/babel-plugin-transform-es2015-arrow-functions-6.22.0.tgz#452692cb711d5f79dc7f85e440ce41b9f244d221"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-block-scoped-functions@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-block-scoped-functions/-/babel-plugin-transform-es2015-block-scoped-functions-6.22.0.tgz#bbc51b49f964d70cb8d8e0b94e820246ce3a6141"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-block-scoping@^6.23.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-block-scoping/-/babel-plugin-transform-es2015-block-scoping-6.26.0.tgz#d70f5299c1308d05c12f463813b0a09e73b1895f"
-  dependencies:
-    babel-runtime "^6.26.0"
-    babel-template "^6.26.0"
-    babel-traverse "^6.26.0"
-    babel-types "^6.26.0"
-    lodash "^4.17.4"
-
-babel-plugin-transform-es2015-classes@^6.23.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-classes/-/babel-plugin-transform-es2015-classes-6.24.1.tgz#5a4c58a50c9c9461e564b4b2a3bfabc97a2584db"
-  dependencies:
-    babel-helper-define-map "^6.24.1"
-    babel-helper-function-name "^6.24.1"
-    babel-helper-optimise-call-expression "^6.24.1"
-    babel-helper-replace-supers "^6.24.1"
-    babel-messages "^6.23.0"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
-babel-plugin-transform-es2015-computed-properties@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-computed-properties/-/babel-plugin-transform-es2015-computed-properties-6.24.1.tgz#6fe2a8d16895d5634f4cd999b6d3480a308159b3"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-
-babel-plugin-transform-es2015-destructuring@^6.23.0:
-  version "6.23.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-destructuring/-/babel-plugin-transform-es2015-destructuring-6.23.0.tgz#997bb1f1ab967f682d2b0876fe358d60e765c56d"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-duplicate-keys@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-duplicate-keys/-/babel-plugin-transform-es2015-duplicate-keys-6.24.1.tgz#73eb3d310ca969e3ef9ec91c53741a6f1576423e"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-plugin-transform-es2015-for-of@^6.23.0:
-  version "6.23.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-for-of/-/babel-plugin-transform-es2015-for-of-6.23.0.tgz#f47c95b2b613df1d3ecc2fdb7573623c75248691"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-function-name@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-function-name/-/babel-plugin-transform-es2015-function-name-6.24.1.tgz#834c89853bc36b1af0f3a4c5dbaa94fd8eacaa8b"
-  dependencies:
-    babel-helper-function-name "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-plugin-transform-es2015-literals@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-literals/-/babel-plugin-transform-es2015-literals-6.22.0.tgz#4f54a02d6cd66cf915280019a31d31925377ca2e"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-modules-amd@^6.22.0, babel-plugin-transform-es2015-modules-amd@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-amd/-/babel-plugin-transform-es2015-modules-amd-6.24.1.tgz#3b3e54017239842d6d19c3011c4bd2f00a00d154"
-  dependencies:
-    babel-plugin-transform-es2015-modules-commonjs "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-
-babel-plugin-transform-es2015-modules-commonjs@^6.23.0, babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.26.0.tgz#0d8394029b7dc6abe1a97ef181e00758dd2e5d8a"
-  dependencies:
-    babel-plugin-transform-strict-mode "^6.24.1"
-    babel-runtime "^6.26.0"
-    babel-template "^6.26.0"
-    babel-types "^6.26.0"
-
-babel-plugin-transform-es2015-modules-systemjs@^6.23.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-systemjs/-/babel-plugin-transform-es2015-modules-systemjs-6.24.1.tgz#ff89a142b9119a906195f5f106ecf305d9407d23"
-  dependencies:
-    babel-helper-hoist-variables "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-
-babel-plugin-transform-es2015-modules-umd@^6.23.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-umd/-/babel-plugin-transform-es2015-modules-umd-6.24.1.tgz#ac997e6285cd18ed6176adb607d602344ad38468"
-  dependencies:
-    babel-plugin-transform-es2015-modules-amd "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-
-babel-plugin-transform-es2015-object-super@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-object-super/-/babel-plugin-transform-es2015-object-super-6.24.1.tgz#24cef69ae21cb83a7f8603dad021f572eb278f8d"
-  dependencies:
-    babel-helper-replace-supers "^6.24.1"
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-parameters@^6.23.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-parameters/-/babel-plugin-transform-es2015-parameters-6.24.1.tgz#57ac351ab49caf14a97cd13b09f66fdf0a625f2b"
-  dependencies:
-    babel-helper-call-delegate "^6.24.1"
-    babel-helper-get-function-arity "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-template "^6.24.1"
-    babel-traverse "^6.24.1"
-    babel-types "^6.24.1"
-
-babel-plugin-transform-es2015-shorthand-properties@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-shorthand-properties/-/babel-plugin-transform-es2015-shorthand-properties-6.24.1.tgz#24f875d6721c87661bbd99a4622e51f14de38aa0"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-plugin-transform-es2015-spread@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-spread/-/babel-plugin-transform-es2015-spread-6.22.0.tgz#d6d68a99f89aedc4536c81a542e8dd9f1746f8d1"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-sticky-regex@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-sticky-regex/-/babel-plugin-transform-es2015-sticky-regex-6.24.1.tgz#00c1cdb1aca71112cdf0cf6126c2ed6b457ccdbc"
-  dependencies:
-    babel-helper-regex "^6.24.1"
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-plugin-transform-es2015-template-literals@^6.22.0:
-  version "6.22.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-template-literals/-/babel-plugin-transform-es2015-template-literals-6.22.0.tgz#a84b3450f7e9f8f1f6839d6d687da84bb1236d8d"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-typeof-symbol@^6.23.0:
-  version "6.23.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-typeof-symbol/-/babel-plugin-transform-es2015-typeof-symbol-6.23.0.tgz#dec09f1cddff94b52ac73d505c84df59dcceb372"
-  dependencies:
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-es2015-unicode-regex@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-unicode-regex/-/babel-plugin-transform-es2015-unicode-regex-6.24.1.tgz#d38b12f42ea7323f729387f18a7c5ae1faeb35e9"
-  dependencies:
-    babel-helper-regex "^6.24.1"
-    babel-runtime "^6.22.0"
-    regexpu-core "^2.0.0"
-
-babel-plugin-transform-exponentiation-operator@^6.22.0:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-exponentiation-operator/-/babel-plugin-transform-exponentiation-operator-6.24.1.tgz#2ab0c9c7f3098fa48907772bb813fe41e8de3a0e"
-  dependencies:
-    babel-helper-builder-binary-assignment-operator-visitor "^6.24.1"
-    babel-plugin-syntax-exponentiation-operator "^6.8.0"
-    babel-runtime "^6.22.0"
-
-babel-plugin-transform-regenerator@^6.22.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-6.26.0.tgz#e0703696fbde27f0a3efcacf8b4dca2f7b3a8f2f"
-  dependencies:
-    regenerator-transform "^0.10.0"
-
-babel-plugin-transform-strict-mode@^6.24.1:
-  version "6.24.1"
-  resolved "https://registry.yarnpkg.com/babel-plugin-transform-strict-mode/-/babel-plugin-transform-strict-mode-6.24.1.tgz#d5faf7aa578a65bbe591cf5edae04a0c67020758"
-  dependencies:
-    babel-runtime "^6.22.0"
-    babel-types "^6.24.1"
-
-babel-preset-env@^1.6.1:
-  version "1.6.1"
-  resolved "https://registry.yarnpkg.com/babel-preset-env/-/babel-preset-env-1.6.1.tgz#a18b564cc9b9afdf4aae57ae3c1b0d99188e6f48"
-  dependencies:
-    babel-plugin-check-es2015-constants "^6.22.0"
-    babel-plugin-syntax-trailing-function-commas "^6.22.0"
-    babel-plugin-transform-async-to-generator "^6.22.0"
-    babel-plugin-transform-es2015-arrow-functions "^6.22.0"
-    babel-plugin-transform-es2015-block-scoped-functions "^6.22.0"
-    babel-plugin-transform-es2015-block-scoping "^6.23.0"
-    babel-plugin-transform-es2015-classes "^6.23.0"
-    babel-plugin-transform-es2015-computed-properties "^6.22.0"
-    babel-plugin-transform-es2015-destructuring "^6.23.0"
-    babel-plugin-transform-es2015-duplicate-keys "^6.22.0"
-    babel-plugin-transform-es2015-for-of "^6.23.0"
-    babel-plugin-transform-es2015-function-name "^6.22.0"
-    babel-plugin-transform-es2015-literals "^6.22.0"
-    babel-plugin-transform-es2015-modules-amd "^6.22.0"
-    babel-plugin-transform-es2015-modules-commonjs "^6.23.0"
-    babel-plugin-transform-es2015-modules-systemjs "^6.23.0"
-    babel-plugin-transform-es2015-modules-umd "^6.23.0"
-    babel-plugin-transform-es2015-object-super "^6.22.0"
-    babel-plugin-transform-es2015-parameters "^6.23.0"
-    babel-plugin-transform-es2015-shorthand-properties "^6.22.0"
-    babel-plugin-transform-es2015-spread "^6.22.0"
-    babel-plugin-transform-es2015-sticky-regex "^6.22.0"
-    babel-plugin-transform-es2015-template-literals "^6.22.0"
-    babel-plugin-transform-es2015-typeof-symbol "^6.23.0"
-    babel-plugin-transform-es2015-unicode-regex "^6.22.0"
-    babel-plugin-transform-exponentiation-operator "^6.22.0"
-    babel-plugin-transform-regenerator "^6.22.0"
-    browserslist "^2.1.2"
-    invariant "^2.2.2"
-    semver "^5.3.0"
-
-babel-register@^6.23.0, babel-register@^6.26.0:
+babel-register@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-register/-/babel-register-6.26.0.tgz#6ed021173e2fcb486d7acb45c6009a856f647071"
   dependencies:
@@ -777,7 +433,7 @@ babel-register@^6.23.0, babel-register@^6.26.0:
     mkdirp "^0.5.1"
     source-map-support "^0.4.15"
 
-babel-runtime@^6.11.6, babel-runtime@^6.18.0, babel-runtime@^6.22.0, babel-runtime@^6.23.0, babel-runtime@^6.26.0:
+babel-runtime@^6.11.6, babel-runtime@^6.22.0, babel-runtime@^6.23.0, babel-runtime@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-runtime/-/babel-runtime-6.26.0.tgz#965c7058668e82b55d7bfe04ff2337bc8b5647fe"
   dependencies:
@@ -794,7 +450,7 @@ babel-template@^6.24.1, babel-template@^6.26.0:
     babylon "^6.18.0"
     lodash "^4.17.4"
 
-babel-traverse@^6.24.1, babel-traverse@^6.26.0:
+babel-traverse@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-traverse/-/babel-traverse-6.26.0.tgz#46a9cbd7edcc62c8e5c064e2d2d8d0f4035766ee"
   dependencies:
@@ -808,7 +464,7 @@ babel-traverse@^6.24.1, babel-traverse@^6.26.0:
     invariant "^2.2.2"
     lodash "^4.17.4"
 
-babel-types@^6.19.0, babel-types@^6.24.1, babel-types@^6.26.0:
+babel-types@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-types/-/babel-types-6.26.0.tgz#a3b073f94ab49eb6fa55cd65227a334380632497"
   dependencies:
@@ -1112,13 +768,6 @@ browserify@^14.0.0, browserify@^14.4.0:
     vm-browserify "~0.0.1"
     xtend "^4.0.0"
 
-browserslist@^2.1.2:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-2.9.0.tgz#706aca15c53be15610f466e348cbfa0c00a6a379"
-  dependencies:
-    caniuse-lite "^1.0.30000760"
-    electron-to-chromium "^1.3.27"
-
 browserstack@1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/browserstack/-/browserstack-1.5.0.tgz#b565425ad62ed72c1082a1eb979d5313c7d4754f"
@@ -1216,10 +865,6 @@ camelcase@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-2.1.1.tgz#7c1d16d679a1bbe59ca02cacecfb011e201f5a1f"
 
-caniuse-lite@^1.0.30000760:
-  version "1.0.30000769"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000769.tgz#d68c5aa0772ea3eac6c97d42e239c9b4d3261b93"
-
 caseless@~0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/caseless/-/caseless-0.11.0.tgz#715b96ea9841593cc33067923f5ec60ebda4f7d7"
@@ -2114,10 +1759,6 @@ ee-first@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
 
-electron-to-chromium@^1.3.27:
-  version "1.3.27"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.27.tgz#78ecb8a399066187bb374eede35d9c70565a803d"
-
 elliptic@^6.0.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.4.0.tgz#cac9af8762c85836187003c8dfe193e5e2eae5df"
@@ -3840,10 +3481,6 @@ jsesc@^1.3.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-1.3.0.tgz#46c3fec8c1892b12b0833db9bc7622176dbab34b"
 
-jsesc@~0.5.0:
-  version "0.5.0"
-  resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
-
 json-schema-traverse@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz#349a6d44c53a51de89b40805c5d5e59b417d3340"
@@ -5050,7 +4687,7 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-private@^0.1.6, private@^0.1.7:
+private@^0.1.7:
   version "0.1.8"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.8.tgz#2381edb3689f7a53d653190060fcf822d2f368ff"
 
@@ -5359,46 +4996,16 @@ redis@^2.7.1:
     redis-commands "^1.2.0"
     redis-parser "^2.6.0"
 
-regenerate@^1.2.1:
-  version "1.3.3"
-  resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.3.3.tgz#0c336d3980553d755c39b586ae3b20aa49c82b7f"
-
 regenerator-runtime@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.0.tgz#7e54fe5b5ccd5d6624ea6255c3473be090b802e1"
 
-regenerator-transform@^0.10.0:
-  version "0.10.1"
-  resolved "https://registry.yarnpkg.com/regenerator-transform/-/regenerator-transform-0.10.1.tgz#1e4996837231da8b7f3cf4114d71b5691a0680dd"
-  dependencies:
-    babel-runtime "^6.18.0"
-    babel-types "^6.19.0"
-    private "^0.1.6"
-
 regex-cache@^0.4.2:
   version "0.4.4"
   resolved "https://registry.yarnpkg.com/regex-cache/-/regex-cache-0.4.4.tgz#75bdc58a2a1496cec48a12835bc54c8d562336dd"
   dependencies:
     is-equal-shallow "^0.1.3"
 
-regexpu-core@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-2.0.0.tgz#49d038837b8dcf8bfa5b9a42139938e6ea2ae240"
-  dependencies:
-    regenerate "^1.2.1"
-    regjsgen "^0.2.0"
-    regjsparser "^0.1.4"
-
-regjsgen@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/regjsgen/-/regjsgen-0.2.0.tgz#6c016adeac554f75823fe37ac05b92d5a4edb1f7"
-
-regjsparser@^0.1.4:
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/regjsparser/-/regjsparser-0.1.5.tgz#7ee8f84dc6fa792d3fd0ae228d24bd949ead205c"
-  dependencies:
-    jsesc "~0.5.0"
-
 remove-trailing-separator@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz#c24bce2a283adad5bc3f58e0d48249b92379d8ef"