Make a jar available to Testbox

I have a Service I’m trying to write tests for, but unable to instantiate it because Testbox uses a different setup than the Coldbox app. I need to get a JAR file available to it. How can I manage that correctly?

Well, I just figured out where the lucee-context folder was, and dropped it in there. For the Coldbox app, I used the /lib folder. This gets me through for now until someone shows me the right way.