diff --git a/MANIFEST.in b/MANIFEST.in
index f9cbb1f..50658b3 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,6 +5,7 @@ include AUTHORS
 include LICENSE
 include TODO
 
+include tests/*.py
 include locale_build/*
 
 recursive-include youtube_dl_gui/data *.png *.ico *.icns
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29