title: How can I configure puma when running Capybara?
body: <p>I'd like to adjust the puma configuration when running Capybara tests. Changing settings in .env, .env.test (I use <a href="https://github.com/bkeepers/dotenv" rel="noreferrer">dotenv</a>), or config/puma.rb has no effect.</p>
  
  <p>Where can I change the configuration?</p>
  
  <p>Rails 5.1, poltergeist 1.15.0, capybara 2.14.0, puma 2.8.2</p>