When writing request specs and you want to set a cookie, setting it with Capybara doesn’t seem to work, best to set it in the request headers.

Sad panda:

Capybara.current_session.driver.browser.set_cookie("really_useful_cookie=#{cookie_monster.id}")

Happy panda:

get some_path, {}, {"HTTP_COOKIE" => "really_useful_cookie=#{cookie_monster.id}”}