diff --git a/js/src/css/index.js b/js/src/css/index.js
index 84a036c33..70e16071f 100644
--- a/js/src/css/index.js
+++ b/js/src/css/index.js
@@ -37,4 +37,6 @@ function css_beautify(source_text, options) {
 }
 
 module.exports = css_beautify;
-module.exports.defaultOptions = new Options();
+module.exports.defaultOptions = function() {
+  return new Options();
+};
diff --git a/js/src/html/index.js b/js/src/html/index.js
index ec82c514b..9bd9aba36 100644
--- a/js/src/html/index.js
+++ b/js/src/html/index.js
@@ -37,4 +37,6 @@ function style_html(html_source, options, js_beautify, css_beautify) {
 }
 
 module.exports = style_html;
-module.exports.defaultOptions = new Options();
+module.exports.defaultOptions = function() {
+  return new Options();
+};
diff --git a/js/src/javascript/index.js b/js/src/javascript/index.js
index 9358fcab7..ec74608a4 100644
--- a/js/src/javascript/index.js
+++ b/js/src/javascript/index.js
@@ -37,4 +37,6 @@ function js_beautify(js_source_text, options) {
 }
 
 module.exports = js_beautify;
-module.exports.defaultOptions = new Options();
+module.exports.defaultOptions = function() {
+  return new Options();
+};
diff --git a/js/test/node-beautify-tests.js b/js/test/node-beautify-tests.js
index b0bfa3433..3ebae5ddd 100755
--- a/js/test/node-beautify-tests.js
+++ b/js/test/node-beautify-tests.js
@@ -19,14 +19,17 @@ function test_legacy_names() {
   results.expect(typeof beautify.html, 'function');
 
   console.log('Ensure defaultOptions are defined');
-  results.expect(typeof beautify.js.defaultOptions, 'object');
-  results.expect(typeof beautify.css.defaultOptions, 'object');
-  results.expect(typeof beautify.html.defaultOptions, 'object');
+  results.expect(typeof beautify.js.defaultOptions, 'function');
+  results.expect(typeof beautify.css.defaultOptions, 'function');
+  results.expect(typeof beautify.html.defaultOptions, 'function');
 
   console.log('Ensure that legacy import names equal the new ones');
   results.expect(beautify.js, beautify.js_beautify);
   results.expect(beautify.css, beautify.css_beautify);
   results.expect(beautify.html, beautify.html_beautify);
+  results.expect(beautify.js.defaultOptions, beautify.js_beautify.defaultOptions);
+  results.expect(beautify.css.defaultOptions, beautify.css_beautify.defaultOptions);
+  results.expect(beautify.html.defaultOptions, beautify.html_beautify.defaultOptions);
 
   console.log(results.results_raw());
   return results.get_exitcode();