Checkbox "Work while idle" on the Suggested Unit Tests toolbar does not become checked when clicked

Hi Bar,

Here is a screencast showing the "Work while idle" and "Add InternalsVisibleTo attribute to referenced projects" checkboxes not becoming checked when clicked. This is a .flv video file recorded using Open Broadcaster Software: http://www.filedropper.com/isolatorcheckboxesrepro

This is with VS 2013 Update 5 CTP and Windows 7 64-bit.