Rakefile in simple_postmark-0.5.1 vs Rakefile in simple_postmark-0.5.2

@@ -1,8 +1,7 @@
-require 'rake'
 require 'rake/testtask'
 
 Rake::TestTask.new do |t|
-  t.test_files = Dir.glob('spec/**/*_spec.rb')
+  t.test_files = FileList['spec/**/*_spec.rb']
 end
 
-task(default: :test)
\ No newline at end of file
+task default: :test