knapsack_pro.gemspec in knapsack_pro-0.50.1 vs knapsack_pro.gemspec in knapsack_pro-0.51.0

@@ -24,9 +24,10 @@
   spec.add_development_dependency 'rspec', '~> 3.0', '>= 2.10.0'
   spec.add_development_dependency 'rspec-its', '~> 1.2'
   spec.add_development_dependency 'cucumber', '>= 0'
   spec.add_development_dependency 'spinach', '>= 0.8'
   spec.add_development_dependency 'minitest', '>= 5.0.0'
+  spec.add_development_dependency 'test-unit', '>= 3.0.0'
   spec.add_development_dependency 'codeclimate-test-reporter', '~> 0'
   spec.add_development_dependency 'pry', '~> 0'
   spec.add_development_dependency 'vcr', '~> 2.9'
   spec.add_development_dependency 'webmock', '~> 1.21'
   spec.add_development_dependency 'timecop', '>= 0.1.0'