diff --git a/test/helper.rb b/test/helper.rb
index 5c0107b4..102e5b30 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -3,7 +3,7 @@ unless Object.const_defined? 'Pry'
   require 'pry'
 end
 
-puts "Ruby v#{RUBY_VERSION} (#{defined?(RUBY_ENGINE) ? RUBY_ENGINE : "ruby"}), Pry v#{Pry::VERSION}, method_source v#{MethodSource::VERSION}, CodeRay v#{CodeRay::VERSION}"
+puts "Ruby v#{RUBY_VERSION} (#{defined?(RUBY_ENGINE) ? RUBY_ENGINE : "ruby"}), Pry v#{Pry::VERSION}, method_source v#{MethodSource::VERSION}, CodeRay v#{CodeRay::VERSION}, Slop v#{Slop::VERSION}"
 
 require 'bacon'
 require 'open4'