diff --git a/certbot-ci/certbot_integration_tests/utils/acme_server.py b/certbot-ci/certbot_integration_tests/utils/acme_server.py
index 425ffb024..bbbdd196b 100755
--- a/certbot-ci/certbot_integration_tests/utils/acme_server.py
+++ b/certbot-ci/certbot_integration_tests/utils/acme_server.py
@@ -59,7 +59,7 @@ class ACMEServer(object):
         if http_01_port != DEFAULT_HTTP_01_PORT:
             if self._acme_type != 'pebble' or self._proxy:
                 raise ValueError('setting http_01_port is not currently supported '
-                                  'with boulder or the HTTP proxy'
+                                  'with boulder or the HTTP proxy')
 
     def start(self):
         """Start the test stack"""