Vim and in-browser tests

I have started migration to Vim. Everything looks great so far, but I have faced quite strong blocker. We have some legacy project available and tests are not always perfect for it. Usually I did verify functionality with browsing page like end-user do in browser then I am sure about design is not broken and all the rest works fine.

What is the suitable for Vim solution, because vim ideology is mouse-less? E.g. Should I stick to capybara tests to verify that everything works fine?