spec/dummy/Gemfile in graphql-1.7.4 vs spec/dummy/Gemfile in graphql-1.7.5

@@ -1,10 +1,12 @@
 # frozen_string_literal: true
+source 'https://rubygems.org'
+
 gem 'rails'
 gem 'puma'
 gem 'capybara'
 gem 'selenium-webdriver'
-gem 'graphql', path: File.expand_path("../../", __dir__)
+gem 'graphql', path: File.expand_path('../../', __dir__)
 
 group :development do
-  gem "listen"
+  gem 'listen'
 end