As with any device that plugs into the OBD2 port, you should REMOVE THE DEVICE AND DRIVE IT SEVERAL TIMES/MILES before taking it into the center for testing. This will force the vehicle to reset all the "OBD2 READINESS MONITORS" and to be prepared for the emissions testing (whether it be on the rollers or just an OBD2 "sniff" test).
The Range module doesn't affect emissions but because we take control of the AFM system, the vehicle may have an OBD2 Readiness monitor show "Not Ready" because it wasn't allowed to run (no V4 mode with the V8 module, for example). The easiest thing to do is just unplug the module and run the vehicle a couple of days without it to be absolutely sure that everything gets a chance to run.
Another good thing to do is top off your tank and drive 50-100 miles total before performing the test (this has nothing to do with the Range module). This allows the EVAP system to perform a proper "purge test" and pressure cycle, which will allow the EVAP OBD2 READINESS MONITOR to show complete.