diff --git a/interfaces/cython/setup.py.in b/interfaces/cython/setup.py.in
index 8b37a2c8e..280b02ac7 100644
--- a/interfaces/cython/setup.py.in
+++ b/interfaces/cython/setup.py.in
@@ -92,7 +92,7 @@ setup(
     ],
     package_data = {
         'cantera.data': ['*.*'],
-        'cantera.test.data': ['*.*'],
+        'cantera.test.data': ['*.*', '*/*.*'],
         'cantera.examples': ['*/*.*'],
         'cantera': ["@py_extension@", '*.pxd'],
     },