diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0bd43457..95ff9569 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -89,7 +89,7 @@ jobs:
           ruby -run -e mkdir -- tmp
           ruby -run -e cp -- -p -r test tmp
           cd tmp
-          ruby test/run.rb
+          rake test
 
   document:
     name: "Document"
diff --git a/Rakefile b/Rakefile
index 8f42da1f..5f27f5a1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,12 +1,14 @@
 require "rdoc/task"
-
 require "bundler/gem_tasks"
+require "rake/testtask"
 
 spec = Bundler::GemHelper.gemspec
 
-desc "Run test"
-task :test do
-  ruby("test/run.rb")
+Rake::TestTask.new do |t|
+  t.verbose = true
+  t.libs << "lib"
+  t.ruby_opts << ["-r", "./test/helper.rb"]
+  t.test_files = FileList["test/**/test_*.rb"]
 end
 
 task :default => :test
diff --git a/test/run.rb b/test/run.rb
deleted file mode 100755
index 089318b0..00000000
--- a/test/run.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/usr/bin/env ruby
-
-$VERBOSE = true
-
-base_dir = File.dirname(File.expand_path(__dir__))
-lib_dir = File.join(base_dir, "lib")
-test_dir = File.join(base_dir, "test")
-
-$LOAD_PATH.unshift(lib_dir)
-
-require_relative "helper"
-
-exit(Test::Unit::AutoRunner.run(true, test_dir))