# Testing - Load sandbox site - Press `Shift+Esc`, then order by CPU usage. - Open DevTools. Look (or filter) for a console message starting with `Diagnostics ID`. Should contain your GUID (or `null` if logged out). - Log out (or log in with an user) - Look for another `Diagnostics ID` message. - Log out (or log in with another user) - Look for another `Diagnostics ID` message. - Ensure CPU usage for Minds tab is not excessive (e.g. 100% constantly. There might be spikes, but high usage should not be constant).