Gemfile.lock in parallel_tests-0.6.15 vs Gemfile.lock in parallel_tests-0.6.16

@@ -15,14 +15,16 @@
       rspec-mocks (~> 2.6.0)
     rspec-core (2.6.4)
     rspec-expectations (2.6.0)
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.6.0)
+    test-unit (2.4.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   jeweler
   parallel
   rake
   rspec (>= 2.4)
+  test-unit