diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..20ecec04
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,40 @@
+name: ci
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+jobs:
+  ci:
+    strategy:
+      fail-fast: false  # https://github.com/actions/runner-images#available-images
+      matrix:  # https://www.lua.org/versions.html
+        os: [macos-26, macos-26-intel, ubuntu-26.04, ubuntu-26.04-arm]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - run: echo "${{ runner.os }} on ${{ runner.arch }}"
+      - if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y luarocks
+      - if: runner.os == 'macOS'
+        run: brew install luarocks
+      - uses: actions/checkout@v7
+      - uses: actions/setup-python@v6
+        with:
+          python-version: 3.x
+          pip-install: --editable .
+      # Dependencies installed.  Start testing.
+      - shell: python  # Sanity check
+        run: |
+          import lua
+          lg = lua.globals()
+          print(f"{lg = }")
+          print(f"{lg.string = }")
+          print(f"{lg.string.lower = }")
+          print(f"{lg.string.lower('Hello world!') = }")
+          assert lg.string.lower('Hello world!') != 'Hello world!'
+          assert lg.string.lower('Hello world!') == 'hello world!'
+      - run: python -m doctest tests/test_lua.py || true
+      - run: pip install pytest
+      - run: pytest || true
+      - run: pytest --doctest-modules || true
diff --git a/setup.py b/setup.py
index 93d6cf0f..302de90e 100755
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,8 @@
 #!/usr/bin/python
 
-import sys
 import os
+import sys
+from distutils.sysconfig import get_python_lib
 
 if sys.version > '3':
     PY3 = True
@@ -9,11 +10,13 @@
     PY3 = False
 
 if PY3:
-    import subprocess as commands
+    from setuptools import Extension, setup
+    from subprocess import getstatusoutput
+    from sysconfig import get_config_var, get_python_version
 else:
-    import commands
-from distutils.core import setup, Extension
-from distutils.sysconfig import get_config_var, get_python_lib, get_python_version
+    from commands import getstatusoutput
+    from distutils.core import setup, Extension
+    from distutils.sysconfig import get_config_var, get_python_version
 
 if os.path.isfile("MANIFEST"):
     os.unlink("MANIFEST")
@@ -22,7 +25,7 @@
 
 LUAVERSION = None
 for version in lua_versions:
-	presult, poutput = commands.getstatusoutput("pkg-config --exists lua" + str(version))
+	presult, poutput = getstatusoutput("pkg-config --exists lua" + str(version))
 	if presult == 0:
 		LUAVERSION = version
 		break
@@ -43,7 +46,7 @@ def pkgconfig(*packages):
 
     combined_pcoutput = ''
     for package in packages:
-        (pcstatus, pcoutput) = commands.getstatusoutput(
+        (pcstatus, pcoutput) = getstatusoutput(
             "pkg-config --libs --cflags %s" % package)
         if pcstatus == 0:
             combined_pcoutput += ' ' + pcoutput