Rakefile in chess-0.3.3 vs Rakefile in chess-0.3.4

@@ -1,18 +1,18 @@
 require 'bundler/gem_tasks'
 
 require 'yard'
 YARD::Rake::YardocTask.new do |t|
-  t.files = ['lib/**/*.rb', 'ext/*.c']
+  t.files = ['lib/**/*.rb', 'ext/**/*.c']
   t.options << '-rREADME.md'
   t.options << '--title=Chess'
   t.options << '-mmarkdown'
   t.options << '--output-dir=docs'
 end
 
 require 'rake/testtask'
 task default: :test
 Rake::TestTask.new do |test|
-  test.libs << 'test'
+  test.libs += %w[ext lib test]
   test.warning = true
   test.test_files = FileList["test/test_#{ENV.fetch('T', '*')}.rb"]
 end