diff --git a/certbot-ci/certbot_integration_tests/certbot_tests/test_main.py b/certbot-ci/certbot_integration_tests/certbot_tests/test_main.py
index c9fa5ff65..74f7e12fe 100644
--- a/certbot-ci/certbot_integration_tests/certbot_tests/test_main.py
+++ b/certbot-ci/certbot_integration_tests/certbot_tests/test_main.py
@@ -630,7 +630,7 @@ def test_revoke_mutual_exclusive_flags(context):
             'revoke', '--cert-name', cert,
             '--cert-path', join(context.config_dir, 'live', cert, 'fullchain.pem')
         ])
-        assert 'Exactly one of --cert-path or --cert-name must be specified' in error.out
+        assert 'Exactly one of --cert-path or --cert-name must be specified' in error.value.output
 
 
 def test_revoke_multiple_lineages(context):