Yep - the main thing that Jest gives out of the box is jsdom, so allows for dom based testing without needing phantom (or more modern now, headless browser). I

Yep - the main thing that Jest gives out of the box is jsdom, so allows for dom based testing without needing phantom (or more modern now, headless browser). I also find it's faster and has better features than Mocha (for instance, coverage out of the box).