diff --git a/setup.py b/setup.py
index 14cd4564..eb45cbc0 100755
--- a/setup.py
+++ b/setup.py
@@ -50,6 +50,7 @@
     platforms=["any"],
     py_modules=["markdown2"],
     package_dir={"": "lib"},
+    data_files=[("testing", ["tox.ini"])],
     entry_points={
         "console_scripts": [
             "markdown2 = markdown2:main"