Rakefile in petitest-0.3.0 vs Rakefile in petitest-0.3.1

@@ -1,6 +1,8 @@
 require "bundler/gem_tasks"
-require "rspec/core/rake_task"
+require "rake/testtask"
 
-RSpec::Core::RakeTask.new(:spec)
+Rake::TestTask.new do |task|
+  task.pattern = "test/**/*_test.rb"
+end
 
-task :default => :spec
+task default: :test