old_contents: var webpack = require('webpack');
  // TODO: use BowerWebpackPlugin
  // var BowerWebpackPlugin = require('bower-webpack-plugin');
  var webpackCommon = require('./webpack.common.config.js');
  
  // Put in separate file?
  var webpackTestConfig = {
      devtool: 'inline-source-map',
      plugins: [
         new webpack.ResolverPlugin(
              new webpack.ResolverPlugin.DirectoryDescriptionFilePlugin('bower.json', ['main'])
          ),
  
          new webpack.ProvidePlugin({
              $: 'jquery',
              jQuery: 'jquery',
              'window.jQuery': 'jquery',
              'window.$': 'jquery'
          }),
      ],
      resolve: webpackCommon.resolve,
      externals: {'jquery': 'jQuery', 'jquery-ui': 'jQuery.ui'},
      module: {
          loaders: [
              // Assume test files are ES6
              {test: /\.test\.js$/, loader: 'babel-loader'},
          ]
      }
  };
  
  
  module.exports = function (config) {
      config.set({
          browsers: ['PhantomJS'],
          frameworks: ['mocha', 'sinon'],
          files: [
              'website/static/vendor/bower_components/jquery/dist/jquery.js',
              'website/static/vendor/bower_components/jquery-ui/ui/jquery-ui.js',
              // Only need to target one file, which will load all files in tests/ that
              // match *.test.js
              'website/static/js/tests/tests.webpack.js',
          ],
          reporters: ['spec'],
          preprocessors: {
              // add webpack as preprocessor
              'website/static/js/tests/tests.webpack.js': ['webpack', 'sourcemap'],
          },
          webpack: webpackTestConfig,
          webpackServer: {
              noInfo: true // don't spam the console
          }
      });
  };
  
new_contents: var webpack = require('webpack');
  // TODO: use BowerWebpackPlugin
  // var BowerWebpackPlugin = require('bower-webpack-plugin');
  var webpackCommon = require('./webpack.common.config.js');
  
  // Put in separate file?
  var webpackTestConfig = {
      devtool: 'inline-source-map',
      plugins: [
         new webpack.ResolverPlugin(
              new webpack.ResolverPlugin.DirectoryDescriptionFilePlugin('bower.json', ['main'])
          ),
  
          new webpack.ProvidePlugin({
              $: 'jquery',
              jQuery: 'jquery',
              'window.jQuery': 'jquery',
              'window.$': 'jquery'
          }),
      ],
      resolve: webpackCommon.resolve,
      externals: {'jquery': 'jQuery', 'jquery-ui': 'jQuery.ui'},
      module: {
          loaders: webpackCommon.module.loaders.concat([
              // Assume test files are ES6
              {test: /\.test\.js$/, loader: 'babel-loader'},
          ])
      }
  };
  
  
  module.exports = function (config) {
      config.set({
          browsers: ['PhantomJS'],
          frameworks: ['mocha', 'sinon'],
          files: [
              'website/static/vendor/bower_components/jquery/dist/jquery.js',
              'website/static/vendor/bower_components/jquery-ui/ui/jquery-ui.js',
              // Only need to target one file, which will load all files in tests/ that
              // match *.test.js
              'website/static/js/tests/tests.webpack.js',
          ],
          reporters: ['spec'],
          preprocessors: {
              // add webpack as preprocessor
              'website/static/js/tests/tests.webpack.js': ['webpack', 'sourcemap'],
          },
          webpack: webpackTestConfig,
          webpackServer: {
              noInfo: true // don't spam the console
          }
      });
  };
  
subject: Use the same loaders in tests as in webpack.common.config.js