Needs to compile to test

Rakefile

@@ -1,12 +1,16 @@
 require "bundler/gem_tasks"
 require "rake/testtask"
 
+name = "io/wait"
+
 Rake::TestTask.new(:test) do |t|
   t.libs << "test/lib"
   t.ruby_opts << "-rhelper"
   t.test_files = FileList["test/**/test_*.rb"]
 end
 
 require 'rake/extensiontask'
-Rake::ExtensionTask.new("io/wait")
+Rake::ExtensionTask.new(name)
+task :test => :compile
+
 task :default => :test