karma-webpack 1.4 bug

assets--karma.conf.js

// Karma configuration
module.exports = function (config) {
    'use strict';

    config.set({

        // base path, that will be used to resolve files and exclude
        basePath: '',

        preprocessors: {
            'tests/**/*.js': ['webpack'],
            'js/**/*.js': ['webpack'],
            'components/webpack-jasmine-flight/lib/jasmine-flight.js': ['webpack']
        },

        frameworks: ['jasmine', 'webpack'],

        plugins: [
            'karma-phantomjs-launcher',
            'karma-chrome-launcher',
            'karma-webpack',
            'karma-jasmine'
        ],

        // list of files / patterns to load in the browser
        files: [
            'components/jquery/dist/jquery.js',
            'components/es5-shim/es5-shim.js',
            'components/es5-shim/es5-sham.js',
            'components/jasmine-jquery/lib/jasmine-jquery.js',
            'components/jasmine-ajax/lib/mock-ajax.js',
            'components/webpack-jasmine-flight/lib/jasmine-flight.js',
            'components/pusher/dist/pusher.min.js',
            'tests/spec/component_data/deliverable-file.spec.js',
            'tests/fixtures/**/*.html',

            'tests/run.js'
        ],

        // list of files to exclude
        exclude: [
            'components/**/specs/**/*',
            'components/**/tests/**/*'
        ],

        // test results reporter to use
        reporters: ['dots'],

        // enable / disable watching file and executing tests whenever any file changes
        autoWatch: true,

        browsers: [
            'Chrome'
        ],

        webpack: {
            resolve: require('./webpack.resolve.js'),
            module: require('./webpack.module.js'),
            externals: {
                'jquery' : '$',
                'pusher' : 'Pusher',
            },
        },

        webpackServer: {
            progress: false,
            stats: true,
            debug: true,
            quiet: false
        },

        captureTimeout: 5000,

        singleRun: false,

        reportSlowerThan: 500,

        color: true
    });
};

assets--webpack.module.js

module.exports = {
    loaders: [
        { test: /\.html$/, loader: 'raw-loader' },
        { test: /\.dot$/, loader: 'dot-loader' },
        { test: /pusher/, loader: 'imports?this=>window' }
    ],
};

assets--webpack.resolve.js

module.exports = {
    root: __dirname,
    alias: {
        'jquery': 'jquery/dist/jquery.js',
        'moment': 'momentjs/moment.js',
        'pusher' : 'pusher/dist/pusher.js',
        'fineuploader': 'fineuploader/dist/s3.jquery.fineuploader',
        'jasmine-flight': 'jasmine-flight/lib/jasmine-flight.js',
    },
    modulesDirectories: ['js', 'components', '../node_modules'],
};