diff --git a/js/tests/helpers/fixture.js b/js/tests/helpers/fixture.js
index 53fef454c45d127c6ec692eb04e42d3161594a87..0bfc26f468bbdad73255399a6e6bb849e14e073e 100644
--- a/js/tests/helpers/fixture.js
+++ b/js/tests/helpers/fixture.js
@@ -23,8 +23,7 @@ export const clearFixture = () => {
   fixtureEl.innerHTML = ''
 }
 
-export const createEvent = (eventName, params) => {
-  params = params || {}
+export const createEvent = (eventName, params = {}) => {
   const e = document.createEvent('Event')
 
   e.initEvent(eventName, Boolean(params.bubbles), Boolean(params.cancelable))
diff --git a/js/tests/karma.conf.js b/js/tests/karma.conf.js
index 5d4b6ed1deb35a96cec22a3e53b0b8f6a08cf2a7..06c594bcebcafb7a72e81337829a86f1e232a778 100644
--- a/js/tests/karma.conf.js
+++ b/js/tests/karma.conf.js
@@ -1,15 +1,14 @@
 /* eslint-env node */
-/* eslint no-process-env: 0 */
-
 const path = require('path')
 const ip = require('ip')
+const babel = require('rollup-plugin-babel')
+const istanbul = require('rollup-plugin-istanbul')
+const resolve = require('rollup-plugin-node-resolve')
+
 const {
   browsers,
   browsersKeys
 } = require('./browsers')
-const babel = require('rollup-plugin-babel')
-const istanbul = require('rollup-plugin-istanbul')
-const resolve = require('rollup-plugin-node-resolve')
 
 const { env } = process
 const browserStack = env.BROWSER === 'true'
diff --git a/package.json b/package.json
index 054abbb6d8dc6b37c51e342be6783ac813d7d345..035711a51238e037ad012e47363799b54c491a2e 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "js-compile-bundle": "rollup --environment BUNDLE:true --config build/rollup.config.js --sourcemap",
     "js-compile-plugins": "node build/build-plugins.js",
     "js-lint": "npm-run-all --continue-on-error --parallel js-lint-*",
-    "js-lint-main": "eslint --cache --cache-location .cache/.eslintcache js/src js/tests build/",
+    "js-lint-main": "eslint --cache --cache-location .cache/.eslintcache js/ build/",
     "js-lint-docs": "eslint --cache --cache-location .cache/.eslintcache site/",
     "js-minify": "npm-run-all --parallel js-minify-main js-minify-docs",
     "js-minify-main": "npm-run-all js-minify-standalone* js-minify-bundle",