Gemfile.common.rb in doorkeeper-2.1.2

- old
+ new

@@ -5,7 +5,10 @@
 gem 'rails', "~> #{ENV['rails']}"
 
 if ENV['rails'][0] == '4'
   gem 'database_cleaner', '~> 1.3.0'
 end
+if ENV['rails'] =~ /4.0|3.2/
+  gem 'rubysl-test-unit'
+end
 
 gemspec path: '../'