How/Where to test new configuration

[abisgroup]

We are a small company that relies on a single FTG 200E. Often, I need to make changes to the config but besides ungodly off-hours window, there is no way to test new configraiton. 

How do you usually test configuration changes if all FTG devices are in production? 

Thanks

OB

[makco10]

Hello,

- Setup a LAB with GNS3: http://makcotechgeek.com/fortigate-vm-usando-gns3/

Regards.