diff --git a/js/x11/core/ext/xtest.js b/js/x11/core/ext/xtest.js
new file mode 100644
index 0000000..27bed60
--- /dev/null
+++ b/js/x11/core/ext/xtest.js
@@ -0,0 +1,45 @@
+// http://www.x.org/releases/X11R7.6/doc/xextproto/xtest.pdf
+
+var x11 = Require('x11/core/x11');
+// TODO: move to templates
+exports.requireExt = function(display, callback)
+{
+    var X = display.client;
+    X.QueryExtension('XTEST', function(err, ext) {
+
+        if (!ext.present)
+            return callback(new Error('extension not available'));
+
+        ext.GetVersion = function(clientMaj, clientMin, callback)
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSCxS', [ext.majorOpcode, 0, 2, clientMaj, clientMin]);
+            X.replies[X.seq_num] = [
+                function(buf, opt) {
+                    var res = buf.unpack('S');
+                    // Major version is in byte 1 of Reply Header
+                    // Minor version is in the body of the reply
+                    return [ opt, res[0] ];
+                },
+                callback
+            ];
+            X.pack_stream.flush();
+        }
+
+        ext.KeyPress = 2;
+        ext.KeyRelease = 3;
+        ext.ButtonPress = 4;
+        ext.ButtonRelease = 5;
+        ext.MotionNotify = 6;
+
+        ext.FakeInput = function( type, keycode, time, wid, x, y )
+        {
+            X.seq_num++;
+            X.pack_stream.pack('CCSCCxxLLxxxxxxxxssxxxxxxxx', [ext.majorOpcode, 2, 9, type, keycode, time, wid, x, y]);
+            X.pack_stream.flush();
+        }
+
+        callback(null, ext);
+    });
+}
+