diff --git a/frontend_tests/zjsunit/zjquery.js b/frontend_tests/zjsunit/zjquery.js
index 7e419b201f..96c8e48131 100644
--- a/frontend_tests/zjsunit/zjquery.js
+++ b/frontend_tests/zjsunit/zjquery.js
@@ -145,6 +145,21 @@ exports.make_zjquery = function () {
                 generic_event('keyup', arg);
                 return self;
             },
+            off: function () {
+                var event_name;
+
+                if (arguments.length === 2) {
+                    event_name = arguments[0];
+                    on_functions[event_name] = [];
+                } else if (arguments.length === 3) {
+                    event_name = arguments[0];
+                    var sel = arguments[1];
+                    var child_on = child_on_functions.setdefault(sel, new Dict());
+                    child_on[event_name] = [];
+                }
+
+                return self;
+            },
             on: function () {
                 // parameters will either be
                 //    (event_name, handler) or