diff --git a/examples/playbook/regtest.py b/examples/playbook/regtest.py
new file mode 100644
index 00000000..15fc9e3c
--- /dev/null
+++ b/examples/playbook/regtest.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+
+import difflib
+import logging
+import re
+import subprocess
+import tempfile
+
+
+LOG = logging.getLogger(__name__)
+
+suffixes = [
+    '-m bin_bash_module',
+    '-m binary_producing_json',
+    '-m binary_producing_junk',
+    '-m old_style_module',
+    '-m python_new_style_module',
+    '-m python_want_json_module',
+    '-m single_null_binary',
+    '-m want_json_module',
+    '-m json_args_python',
+    '-m setup',
+]
+
+fixups = [
+    ('Shared connection to localhost closed\\.(\r\n)?', ''),  # TODO
+]
+
+
+def fixup(s):
+    for regex, to in fixups:
+        s = re.sub(regex, to, s, re.DOTALL|re.M)
+    return s
+
+
+def run(s):
+    LOG.debug('running: %r', s)
+    with tempfile.NamedTemporaryFile() as fp:
+        # https://www.systutorials.com/docs/linux/man/1-ansible-playbook/#lbAG
+        returncode = subprocess.call(s, stdout=fp, stderr=fp, shell=True)
+        fp.write('\nReturn code: %s\n' % (returncode,))
+        fp.seek(0)
+        return fp.read()
+
+
+logging.basicConfig(level=logging.DEBUG)
+
+for suffix in suffixes:
+    ansible = run('ansible localhost %s' % (suffix,))
+    mitogen = run('ANSIBLE_STRATEGY=mitogen ansible localhost %s' % (suffix,))
+
+    diff = list(difflib.unified_diff(
+        a=fixup(ansible).splitlines(),
+        b=fixup(mitogen).splitlines(),
+        fromfile='ansible-output.txt',
+        tofile='mitogen-output.txt',
+    ))
+    if diff:
+        print '++ differ! suffix: %r' % (suffix,)
+        for line in diff:
+            print line
+        print
+        print