Unittest runner broken in eap 5 build 1530?

I'm using R#Eap 5 build 1530 on VS2005 Pro edition SP1, with NUnit 2.5.2.9222, these unit tests run on 4.5.x, but not now. The solution compiles, and there has been no error/exception captured. This happens when I start vs2005 fresh.

BTW, why disable the rununitests on solution context menu, when righting click on solution node? I know there is a new menu item under unittest says run all test on solution, but it's just inconvienient.