In recovery plan settings you can configure a portgroup for test purposes. Simply point it to your production network and SRM will connect the VMs to it instead of a bubble.
Another possible solution could be to use a separate non-routable VLAN for testing purposes at DR site.
VMs will be powered on at DR site, while Production VMs will continue to run), After the validation tests are over, SRM will perform cleanup and you are done.
Thus you utilize the "native" test scenario of SRM and you don't have to worry about your production site's data.
The drawback of this approach is how you provide users an access to test environment (VM Console via vCenter / some networking tricks).
Also, the question is if your application depends on other servers that are not connected to the test VLAN.
Michael.