Gemfile in europeana-api-0.3.4 vs Gemfile in europeana-api-0.3.5

@@ -2,11 +2,11 @@
 
 # Specify your gem's dependencies in europeana.gemspec
 gemspec
 
 group :test do
-  gem 'coveralls'
+  gem 'coveralls', require: false
 end
 
 group :test, :develop do
-  gem 'rubocop'
+  gem 'rubocop', require: false
 end