Anybody have any tips to share about unit testing code that uses drb?

My problem is, I can test all the the logic in smaller chunks, but as 
soon as I integrate everyhting and have code in place that verifies and 
recovers from connection errors I need to at least establish that drb 
connection.

How would I go about doing this in a unit test environment?
Getting a mock drb server in a thread and launching it in setup seems 
too clunky.
Any brilliant ideas?
Cheers,
V.-
-- 
http://www.braveworld.net/riva