--- a/testing/marionette/event.js
+++ b/testing/marionette/event.js
@@ -1327,8 +1327,12 @@ event.click = function(el, modifiers = {
 
 event.change = function(el, modifiers = {}, opts = {}) {
   return event.sendEvent("change", el, modifiers, opts);
 };
 
 event.input = function(el, modifiers = {}, opts = {}) {
   return event.sendEvent("input", el, modifiers, opts);
 };
+
+event.change = function(el, modifiers = {}, opts = {}) {
+  return event.sendEvent("change", el, modifiers, opts);
+};