diff --git a/tests/playback.js b/tests/playback.js
index 166d08df..f156f83f 100644
--- a/tests/playback.js
+++ b/tests/playback.js
@@ -37,6 +37,7 @@ enable_test_mode = function () {
 
 next_iteration = function () {
     rfb = new RFB({'target': document.getElementById('VNC_canvas'),
+                   'view_only': true,
                    'onDisconnected': disconnected,
                    'onNotification': notification});
     enable_test_mode();