Speed up specs by disabling both jQuery effects and CSS transformations

application.html.erb

<% if Rails.env.test? %>
    <%= content_for :head do %>
      <style type="text/css">
        .notransition * {
        -webkit-transition: none !important;
        -moz-transition: none !important;
        -o-transition: none !important;
        -ms-transition: none !important;
        transition: none !important;
      }
      </style>
    <% end %>

    <script type="text/javascript">
      $.fx.off = true;
      $('body').addClass('notransition');
    </script>
  <% end %>

Further explanation : http://venombytes.com/2013/03/11/faster-browser-specs

Would it be the same if you changed line 4 to "* {" and removed line 16?