The ISRA does not do testing.  However a few other clubs in the valley do.

N7LGN American Legion Post 113 does test sessions.  Usually monthly at the American Legion Post 113 in Meridian.  Contact rjdees@aol.com for information.

Boise County Amateur Radio Club (BCARC):
Email Tom (wa9wsj@wa9wsj.com) for information

The Voice of Idaho Radio Club tests monthly:
Go to the Voice of Idaho calendar at www.voiceofidaho.org to find the next testing session.  Normally, they test monthly at Food 2 Store, 521 East 3rd street, Meridian, Idaho, 83642