diff --git a/MANIFEST.in b/MANIFEST.in
index 4c8fbbf..c716a56 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -11,4 +11,4 @@ recursive-exclude docs *.pyo
 prune docs/_build
 recursive-include sigal/themes *
 include sigal/templates/sigal.conf.py
-recursive-exclude tests *
+recursive-include tests *