karma-build-jasmine.es2015.conf.js
module.exports = function(config) {
require('./karma-build-jasmine.conf.js')(config);
for (let i = 0; i < config.files.length; i++) {
if (config.files[i] === 'node_modules/core-js-bundle/index.js') {
config.files.splice(i, 1);
break;
}
}
config.client.entrypoint = 'browser_es2015_entry_point';
};