diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4df57da8..fd726588 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,5 +12,5 @@ jobs:
         with:
           ruby-version: "3.2.2"
 
-      - name: rake check
-        run: rake check
\ No newline at end of file
+      - name: run tests
+        run: ruby tests/**/*_test.rb
\ No newline at end of file
diff --git a/tests/check_test.rb b/tests/check_test.rb
new file mode 100644
index 00000000..ba51df26
--- /dev/null
+++ b/tests/check_test.rb
@@ -0,0 +1,26 @@
+require_relative "test_helper"
+
+class CheckTest < Minitest::Test
+  def with_captured_stdout
+    original_stdout = $stdout
+    $stdout = StringIO.new
+    yield
+    $stdout.string
+  ensure
+    $stdout = original_stdout
+  end
+
+  def test_check_asserts
+    output = with_captured_stdout do
+      Rake::Task['check:asserts'].invoke
+    end
+    assert_match(/OK/, output)
+  end
+
+  def test_check_abouts
+    output = with_captured_stdout do
+      Rake::Task['check:abouts'].invoke
+    end
+    assert_match(/OK/, output)
+  end
+end
\ No newline at end of file
diff --git a/tests/test_helper.rb b/tests/test_helper.rb
new file mode 100644
index 00000000..0abf0b64
--- /dev/null
+++ b/tests/test_helper.rb
@@ -0,0 +1,4 @@
+require "minitest/autorun"
+require "rake"
+
+Rake.application.load_rakefile
\ No newline at end of file