diff --git a/draper.gemspec b/draper.gemspec
index de9e185..b10d7c0 100644
--- a/draper.gemspec
+++ b/draper.gemspec
@@ -18,6 +18,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'activesupport', '~> 3.2'
   s.add_dependency 'actionpack', '~> 3.2'
+  s.add_dependency 'minitest', '~> 3.0' if RUBY_PLATFORM == "java"
 
   s.add_development_dependency 'ammeter', '~> 0.2.2'
   s.add_development_dependency 'guard'