diff --git a/MANIFEST.in b/MANIFEST.in
index 4e072d1c..e3cb20eb 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,3 +1,4 @@
 include setup.py README.rst MANIFEST.in LICENSE ez_setup.py
 include cassandra/*.pyx
 include cassandra/*.pxd
+include tests/unit/cython/*.pyx