Commands to enable updates-testing

[Temlakos]

Would someone please share the command(s) to enable the RPMFusion 
updates-testing repository on my system, in preparation for upgrading 
from F22 to F23.

As far as I can tell, I have the updates-testing .repo file on my system 
(/etc/yum.repos.d/). What I don't know, is how to make sure the upgrade 
program will use it to upgrade all rpmfusion packages.

Temlakos