Test Installation on Virtual PCs

[Ordona, Kenneth C]

This is probably a pretty basic question but here goes: 

I'm currently trying to create a test installation of the Shibboleth IDP/SP on two separate virtual PCs(IDP on one, SP on the other).
However, I am currently barred from using my dns in the installation due to security reasons. Is there any way that I can get the IDP and SP to communicate with each other without using the DNS of my organization(PNNL)? 

Thank you for helping me,
Ken Ordona