Disable warnings.

Rakefile

@@ -4,7 +4,7 @@ require "rake/testtask"
 Rake::TestTask.new(:test) do |t|
   t.libs << 'test'
   t.test_files = FileList['test/**/*_test.rb']
-  t.verbose = true
+  t.warning = false
 end
 
 task :default => :test