diff --git a/MANIFEST.in b/MANIFEST.in
index 49f5cb8..061d4b1 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,5 +1,6 @@
 include Makefile
 include requirements*.txt
 include version.txt
+include conftest.py
 recursive-include swh/loader/mercurial/tests/data *
 recursive-include swh py.typed