Gemfile in amazon-ecs-2.4.0 vs Gemfile in amazon-ecs-2.5.0

@@ -1,8 +1,9 @@
 source 'http://rubygems.org'
 
 gem 'nokogiri', '~> 1.4'
 gem 'ruby-hmac', '~> 0.3'
+gem 'test-unit'
 
 group :dev do
   gem 'rake'
-end
\ No newline at end of file
+end