What testing framework should I use to test node js modules?

I'm building a NodeJS module that needs some testing before publishing. I'm familiar with Karma and Protractor both using Jasmine. But they're both for testing on browsers which has nothing to do with my module (since it's meant to be core code of other applications/modules).

What is the best choice here? All I want to do is to call some functions of my module, feed it data and expect some outcome (return value). No interaction with browser needed.