Correct brokenness

Reported by @lauren-hp

Author: Steven G. Harms

spec/spec_helper.rb

@@ -2,6 +2,7 @@
 require_relative '../config/environment'
 require 'rack/test'
 require 'capybara/poltergeist'
+require 'capybara/dsl'
 
 Capybara.javascript_driver = :poltergeist
 
@@ -15,4 +16,4 @@ def app
   Rack::Builder.parse_file('config.ru').first
 end
 
-Capybara.app = app
+Capybara.app = app