diff --git a/Gemfile b/Gemfile
index 8845621d..c19f7552 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,5 @@ source 'http://rubygems.org'
 
 # Specify your gem's dependencies in active_model_serializers.gemspec
 gemspec
+
+gem "pry"
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 97ad9f52..689d8bfa 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,5 +1,6 @@
 require "rubygems"
 require "bundler/setup"
+require "pry"
 
 require "active_model_serializers"
 require "active_support/json"