Rakefile in structure-0.21.0 vs Rakefile in structure-0.22.0

@@ -2,8 +2,8 @@
 require 'rake/testtask'
 
 task :default => :test
 
 Rake::TestTask.new do |test|
-  test.libs << 'test'
+  test.libs += %w{lib test}
   test.test_files = FileList['test/**/*_test.rb']
 end