diff --git a/letsencrypt/tests/cli_test.py b/letsencrypt/tests/cli_test.py
index e865099e8..ccf16f5b5 100644
--- a/letsencrypt/tests/cli_test.py
+++ b/letsencrypt/tests/cli_test.py
@@ -413,7 +413,7 @@ class CLITest(unittest.TestCase):  # pylint: disable=too-many-public-methods
     @mock.patch('letsencrypt.cli._treat_as_renewal')
     @mock.patch('letsencrypt.cli._init_le_client')
     def test_certonly_renewal(self, mock_init, mock_renewal, mock_get_utility, _suggest):
-        cert_path = '/etc/letsencrypt/live/foo.bar/cert.pem'
+        cert_path = 'letsencrypt/tests/testdata/cert.pem'
         chain_path = '/etc/letsencrypt/live/foo.bar/fullchain.pem'
 
         mock_lineage = mock.MagicMock(cert=cert_path, fullchain=chain_path)