diff --git a/lib/resources/Files.js b/lib/resources/Files.js
index b400d002fe..58d81b1219 100644
--- a/lib/resources/Files.js
+++ b/lib/resources/Files.js
@@ -8,9 +8,7 @@ const multipartDataGenerator = require('../MultipartDataGenerator');
 const Error = require('../Error');
 
 module.exports = StripeResource.extend({
-  requestDataProcessor(method, data, headers, callback) {
-    data = data || {};
-
+  requestDataProcessor(method, data = {}, headers, callback) {
     if (method === 'POST') {
       return getProcessorForSourceType(data);
     } else {
diff --git a/lib/resources/OAuth.js b/lib/resources/OAuth.js
index 70ce4a2358..3e18ff2e17 100644
--- a/lib/resources/OAuth.js
+++ b/lib/resources/OAuth.js
@@ -9,10 +9,7 @@ const oAuthHost = 'connect.stripe.com';
 module.exports = StripeResource.extend({
   basePath: '/',
 
-  authorizeUrl(params, options) {
-    params = params || {};
-    options = options || {};
-
+  authorizeUrl(params = {}, options = {}) {
     let path = 'oauth/authorize';
 
     // For Express accounts, the path changes
diff --git a/test/Webhook.spec.js b/test/Webhook.spec.js
index 23344013c0..79576b4c6b 100644
--- a/test/Webhook.spec.js
+++ b/test/Webhook.spec.js
@@ -205,9 +205,7 @@ describe('Webhooks', () => {
   });
 });
 
-function generateHeaderString(opts) {
-  opts = opts || {};
-
+function generateHeaderString(opts = {}) {
   opts.timestamp = Math.floor(opts.timestamp) || Math.floor(Date.now() / 1000);
   opts.payload = opts.payload || EVENT_PAYLOAD_STRING;
   opts.secret = opts.secret || SECRET;