Hi,

Normally your license covers you for an installation of the software on 1 machine - You are able to create many instances/databases on that machine as long as the number of users does not exceed your license.
A standard license does not normally cover you for installations on multiple machines ie 4 installations on seperate machines each having 10 users would not be covered by your 40 user license.

I presume (as you state you want to use the same media) that your test environment is on a different machine and therefore would not be covered by your production license.

Hope this makes sense.

Moff.