diff --git a/IPython/html/tests/widgets/widget_selection.js b/IPython/html/tests/widgets/widget_selection.js
index b1e90c8..5f5b29e 100644
--- a/IPython/html/tests/widgets/widget_selection.js
+++ b/IPython/html/tests/widgets/widget_selection.js
@@ -8,7 +8,7 @@ casper.notebook_test(function () {
 
     var combo_selector = '.widget-area .widget-subarea .widget-hbox-single .btn-group .widget-combo-btn';
     var multibtn_selector = '.widget-area .widget-subarea .widget-hbox-single .btn-group[data-toggle="buttons-radio"]';
-    var radio_selector = '.widget-area .widget-subarea .widget-hbox .vbox';
+    var radio_selector = '.widget-area .widget-subarea .widget-hbox ..widget-radio-box';
     var list_selector = '.widget-area .widget-subarea .widget-hbox .widget-listbox';
 
     var selection_index;