The Test Realm will be going offline for about an hour at 4:15 pm US Central to apply an update. Please see the Test Realm's Update Notes Page for a complete list of updates. Scroll to the bottom: Upkeep and Maintenance – Spiral Date 476053 (9/18/2013).
This update is listed below for your convenience:
The “Upgrade Now” button will not be present if you've purchased crowns in the last 30 days and will not be present during combat.