diff --git a/certbot-ci/certbot_integration_tests/utils/acme_server.py b/certbot-ci/certbot_integration_tests/utils/acme_server.py
index 8f02cfa55..6f65a05c0 100755
--- a/certbot-ci/certbot_integration_tests/utils/acme_server.py
+++ b/certbot-ci/certbot_integration_tests/utils/acme_server.py
@@ -211,7 +211,7 @@ class ACMEServer:
             # Wait for the ACME CA server to be up.
             print('=> Waiting for boulder instance to respond...')
             misc.check_until_timeout(
-                self.acme_xdist['directory_url'], attempts=300)
+                self.acme_xdist['directory_url'], attempts=600)
 
             if not self._dns_server:
                 # Configure challtestsrv to answer any A record request with ip of the docker host.