Packing JAVA tests to test my APP in offline environment

I have a java project (Huge one) that I'm want to deploy to an off-line environment.

This environment only has access to Nexus(artifact repository) but not to my git repository, So I upload my app with a script, and I want to run tests on it - But I can't run the tests using the test source because I don't have it (No access to GIT). What is the best way to pack the tests (in a jar file? UberJar?), What is the best practice to do so?

Thanks in advance.