You would like to upgrade your jquery-ui-rails gem from a version before 0.5.x to the latest version 0.5.0, but when you do that your tests are failing with error messages similar to the one below:
ActionView::Template::Error: couldn't find file 'jquery.ui.effect-blind'
According to the changelog the naming between 4.2.1 and 0.5.0 has changed jquery-ui-rails
//= require jquery.ui.effect-blind
you would need to change it to the following after upgrading your jquery-ui-rails gem to ~> 0.5.0:
//= require jquery-ui/effect-blind