diff --git a/letsencrypt/tests/cli_test.py b/letsencrypt/tests/cli_test.py
index bc0fa6892..be7b8acda 100644
--- a/letsencrypt/tests/cli_test.py
+++ b/letsencrypt/tests/cli_test.py
@@ -137,7 +137,7 @@ class CLITest(unittest.TestCase):  # pylint: disable=too-many-public-methods
         exc = None
         try:
             with mock.patch('letsencrypt.cli.sys.stderr'):
-                out = cli.main(self.standard_args + args[:])  # NOTE: parser can alter its args!
+                cli.main(self.standard_args + args[:])  # NOTE: parser can alter its args!
         except errors.MissingCommandlineFlag, exc:
             self.assertTrue(message in str(exc))
         self.assertTrue(exc is not None)