diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..1eef948
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,22 @@
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ["3.2", "3.3", "3.4", "4.0"]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec bin/test
diff --git a/Gemfile.lock b/Gemfile.lock
index ca8b440..a311a82 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,26 +1,28 @@
 PATH
   remote: .
   specs:
-    testerobly (1.1.1)
+    testerobly (1.1.2)
       listen (~> 3.9.0)
+      logger (~> 1.7)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ffi (1.17.2)
-    ffi (1.17.2-arm64-darwin)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.7.0)
+    minitest (5.27.0)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
 
 PLATFORMS
-  arm64-darwin-24
   ruby
 
 DEPENDENCIES
+  minitest (~> 5.0)
   testerobly!
 
 BUNDLED WITH
diff --git a/bin/test b/bin/test
new file mode 100755
index 0000000..5496809
--- /dev/null
+++ b/bin/test
@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+test_files = if ARGV.empty?
+  Dir["test/**/*_test.rb"]
+else
+  ARGV
+end
+
+if test_files.empty?
+  warn "No test files found."
+  exit 1
+end
+
+exec "ruby", "-Itest", *test_files
diff --git a/config/testerobly.rb b/config/testerobly.rb
index 2d3b83f..6a7eab8 100644
--- a/config/testerobly.rb
+++ b/config/testerobly.rb
@@ -1,6 +1,6 @@
 Testerobly.configure do |config|
-  config.test_command = "ruby %s"
-  config.test_all_command = "echo 'sample test all command'"
+  config.test_command = "bin/test %s"
+  config.test_all_command = "bin/test"
   config.on_change = Proc.new do |path, tests|
     if path == "config/testerobly.rb"
       tests << "test/custom_on_change.rb"
diff --git a/test/custom_on_change.rb b/test/custom_on_change.rb
deleted file mode 100644
index 8274e43..0000000
--- a/test/custom_on_change.rb
+++ /dev/null
@@ -1,4 +0,0 @@
-puts "custom_on_change.rb here"
-# require "debug"
-# debugger
-
diff --git a/test/custom_on_change_test.rb b/test/custom_on_change_test.rb
new file mode 100644
index 0000000..65a0ebf
--- /dev/null
+++ b/test/custom_on_change_test.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+class CustomOnChangeTest < Minitest::Test
+  def test_custom_on_change_is_runnable
+    assert_equal 2, 1 + 1
+  end
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
new file mode 100644
index 0000000..8861356
--- /dev/null
+++ b/test/test_helper.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+require "bundler/setup"
+require "minitest/autorun"
+require "fileutils"
+require "tmpdir"
+
+require "testerobly"
diff --git a/test/testerobly_test.rb b/test/testerobly_test.rb
index 095809b..df78b2c 100644
--- a/test/testerobly_test.rb
+++ b/test/testerobly_test.rb
@@ -1 +1,103 @@
-puts "testerobly_test.rb here"
+# frozen_string_literal: true
+
+require_relative "test_helper"
+
+class TesteroblyTest < Minitest::Test
+  def setup
+    @original_configuration = Testerobly.configuration
+    Testerobly.configuration = Testerobly::Configuration.new
+  end
+
+  def teardown
+    Testerobly.configuration = @original_configuration
+  end
+
+  def test_configuration_defaults_and_bind
+    config = Testerobly.configuration
+
+    assert_equal "bin/test %s", config.test_command
+    assert_equal({}, config.keys)
+    assert_nil config.on_change
+
+    config.bind("s", "echo hi")
+    config.test_all_command = "bin/test"
+
+    assert_equal "echo hi", config.keys["s"]
+    assert_equal "bin/test", config.keys[""]
+  end
+
+  def test_configure_yields_configuration
+    Testerobly.configure do |config|
+      config.test_command = "ruby %s"
+    end
+
+    assert_equal "ruby %s", Testerobly.configuration.test_command
+  end
+
+  def test_process_changes_enqueues_matching_tests
+    with_tmp_project do |dir|
+      write_file(dir, "lib/foo.rb", "# frozen_string_literal: true\n")
+      write_file(dir, "test/foo_test.rb", "# frozen_string_literal: true\n")
+
+      main = build_main
+
+      Dir.chdir(dir) do
+        main.process_changes(["lib/foo.rb"], [])
+      end
+
+      queue = main.instance_variable_get(:@queue)
+
+      assert_equal 1, queue.size
+      item = queue.pop
+      assert_equal "bin/test test/foo_test.rb", item[:command]
+      assert_equal "lib/foo.rb => test/foo_test.rb", item[:message]
+    end
+  end
+
+  def test_process_changes_applies_on_change_hook
+    with_tmp_project do |dir|
+      write_file(dir, "lib/foo.rb", "# frozen_string_literal: true\n")
+      write_file(dir, "test/foo_test.rb", "# frozen_string_literal: true\n")
+      write_file(dir, "test/extra_test.rb", "# frozen_string_literal: true\n")
+
+      Testerobly.configuration.on_change = Proc.new do |_path, tests|
+        tests << "test/extra_test.rb"
+      end
+
+      main = build_main
+
+      Dir.chdir(dir) do
+        main.process_changes(["lib/foo.rb"], [])
+      end
+
+      queue = main.instance_variable_get(:@queue)
+
+      assert_equal 1, queue.size
+      item = queue.pop
+      assert_equal "bin/test test/foo_test.rb test/extra_test.rb", item[:command]
+    end
+  end
+
+  private
+
+  def build_main
+    main = Testerobly::Main.allocate
+    main.instance_variable_set(:@queue, Thread::Queue.new)
+    main.instance_variable_set(:@pause_until, Time.now - 1)
+    main
+  end
+
+  def with_tmp_project
+    Dir.mktmpdir do |dir|
+      FileUtils.mkdir_p(File.join(dir, "lib"))
+      FileUtils.mkdir_p(File.join(dir, "test"))
+      yield dir
+    end
+  end
+
+  def write_file(base, relative_path, contents)
+    full_path = File.join(base, relative_path)
+    FileUtils.mkdir_p(File.dirname(full_path))
+    File.write(full_path, contents)
+  end
+end
diff --git a/testerobly.gemspec b/testerobly.gemspec
index 8f96b8b..6a258f4 100644
--- a/testerobly.gemspec
+++ b/testerobly.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name        = "testerobly"
-  spec.version     = "1.1.1"
+  spec.version     = "1.1.2"
   spec.summary     = "Test runner to launch alongside your developer session for immediate feedback"
   spec.description = ""
   spec.authors     = ["Robert Starsi"]
@@ -14,4 +14,7 @@ Gem::Specification.new do |spec|
   spec.executables = %w[ testerobly ]
 
   spec.add_dependency "listen", "~> 3.9.0"
+  spec.add_dependency "logger", "~> 1.7"
+
+  spec.add_development_dependency "minitest", "~> 5.0"
 end