diff --git a/setup.py b/setup.py
index 24ff3752d..8a473ebb4 100755
--- a/setup.py
+++ b/setup.py
@@ -35,6 +35,7 @@ setup(
     packages=[
         'letsencrypt',
         'letsencrypt.client',
+        'letsencrypt.client.tests',
         'letsencrypt.scripts',
     ],
     install_requires=install_requires,