diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..1908ecf
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,17 @@
+name: build
+on: [pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        mruby_version: ["3.0.0", "2.1.2"]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install packages
+        run: |
+          sudo apt-get -qq update
+          sudo apt-get -qq install rake bison git gperf
+      - name: Test
+        run: MRUBY_VERSION=${{ matrix.mruby_version }} rake test
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..11246db
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+mruby/
+build_config.rb.lock
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..45acec2
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,31 @@
+MRUBY_CONFIG=File.expand_path(ENV["MRUBY_CONFIG"] || "build_config.rb")
+MRUBY_VERSION=ENV["MRUBY_VERSION"] || "3.0.0"
+
+file :mruby do
+  sh "git clone --depth=1 git://github.com/mruby/mruby.git"
+  if MRUBY_VERSION != 'master'
+    Dir.chdir 'mruby' do
+      sh "git fetch --tags"
+      rev = %x{git rev-parse #{MRUBY_VERSION}}
+      sh "git checkout #{rev}"
+    end
+  end
+end
+
+desc "compile binary"
+task :compile => :mruby do
+  sh "cd mruby && rake all MRUBY_CONFIG=#{MRUBY_CONFIG}"
+end
+
+desc "test"
+task :test => :mruby do
+  sh "cd mruby && rake all test MRUBY_CONFIG=#{MRUBY_CONFIG}"
+end
+
+desc "cleanup"
+task :clean do
+  exit 0 unless File.directory?('mruby')
+  sh "cd mruby && rake deep_clean"
+end
+
+task :default => :compile
diff --git a/build_config.rb b/build_config.rb
index d93dde3..3c6f30a 100644
--- a/build_config.rb
+++ b/build_config.rb
@@ -6,6 +6,7 @@
   end
 
   conf.enable_debug
+  conf.enable_test
 
   conf.cc.flags << '-DMRB_INT64'
 
diff --git a/rakelib/mruby.rake b/rakelib/mruby.rake
deleted file mode 100644
index 478ade8..0000000
--- a/rakelib/mruby.rake
+++ /dev/null
@@ -1,44 +0,0 @@
-namespace :mruby do
-  task :setup_mruby_build_variables do
-    # When calling mruby rake tasks, use the local build_config.rb
-    ENV['MRUBY_CONFIG'] = Dir.pwd + '/build_config.rb'
-
-    # Try to find MRuby on path if no MRUBY_HOME set
-    if !ENV['MRUBY_HOME']
-      mruby_from_path = `which mruby`.strip
-      if mruby_from_path.length > 0
-        ENV['MRUBY_HOME'] = File.absolute_path(mruby_from_path + '/../..')
-      end
-
-      # Maybe MRuby is next to this gem?
-      ENV['MRUBY_HOME'] ||= Dir.pwd + '/../mruby'
-    end
-
-    # Still no luck? Raise hell!
-    if !ENV['MRUBY_HOME'] || !File.directory?(ENV['MRUBY_HOME'])
-      raise 'Unable to find MRuby. Please set $MRUBY_HOME.'
-    end
-  end
-
-  desc 'Clean the build artifacts'
-  task :clean => :setup_mruby_build_variables do
-    if File.directory?('build')
-      rm_rf 'build'
-    end
-    cd ENV['MRUBY_HOME'] {
-      sh 'rake clean'
-    }
-  end
-
-  desc 'Build mruby with the local build_config'
-  task :build => :setup_mruby_build_variables do
-    if File.directory?('build')
-      rm_rf 'build'
-    end
-    mkdir 'build'
-    cd ENV['MRUBY_HOME'] {
-      sh 'rake default'
-    }
-    cp_r Dir["#{ENV['MRUBY_HOME']}/build/host/{bin,lib}"], 'build'
-  end
-end