diff --git a/active_model_serializers.gemspec b/active_model_serializers.gemspec
index 1d30e1c4..c5724df9 100644
--- a/active_model_serializers.gemspec
+++ b/active_model_serializers.gemspec
@@ -20,4 +20,5 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'activemodel', '>= 3.0'
   gem.add_development_dependency "rails", ">= 3.0"
   gem.add_development_dependency "pry"
+  gem.add_development_dependency "minitest"
 end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index ecee123c..e36c3700 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -5,7 +5,7 @@ require "pry"
 
 require "active_model_serializers"
 require "active_support/json"
-require "test/unit"
+require "minitest/autorun"
 
 require 'rails'