diff --git a/MANIFEST.in b/MANIFEST.in
index 530871b084..2004cb242c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,6 +1,6 @@
 include README.rst LICENSE.txt CHANGES.rst
 include requirements.txt
-include build-docs.py lint-code.py run-tests.py  try-examples.py update-help.py
+include conftest.py build-docs.py lint-code.py run-tests.py  try-examples.py update-help.py
 include tox.ini
 recursive-include tests *.py *.png
 recursive-include examples *.py *.ipynb