How do you simulate an keyDown enter event (or others) in Enzyme?

I'm using 'shallow' mount (Enzyme 3.7.0 with Jest 23.6.0). This work for me:

const input = wrapper.find('input');
input.simulate('change', { target: { value: 'abcdefg'} });
input.simulate('keydown', { keyCode: 13 });

Instead of using a keyCode, I used a key, in the case of 'Enter', using mount:

wrapper.find('input').simulate('keypress', {key: 'Enter'})