Used this on a few sets of alts now so figured I would share. This macro will equip the gear give to you by the /testbuff command on test server. I manually /testbuff and autoinventory the bags as part of setup since I move a couple other things around as well, though that probably could be built in as well at some point.
First use /testbuff and autoinventory the bags then:
Usage: /mac testgear