I am with Richard on this one - it killed me for a long time trying to figure out who the heck was using GP when I was attempting to restore databases.
Management Report has an 'always reading' relationship with the databases - really nice - but . . . .
So if MR is set up to have access to the TEST company, then you are going to have to 'stop' the MR Service while you make the RESTORE.
Good luck.