diff --git a/config/general_config/featureset027.yml b/config/general_config/featureset027.yml
index 79d079586..4d8e24f6e 100644
--- a/config/general_config/featureset027.yml
+++ b/config/general_config/featureset027.yml
@@ -15,8 +15,9 @@ containerized_overcloud: false
 containerized_undercloud: true
 undercloud_templates_path: /usr/share/openstack-tripleo-heat-templates
 undercloud_custom_env_files: "{{ working_dir }}/undercloud-parameter-defaults.yaml"
-undercloud_cloud_domain: "localdomain"
-undercloud_undercloud_hostname: "undercloud.{{ undercloud_cloud_domain }}"
+# Prevent regression as described in https://bugs.launchpad.net/tripleo/+bug/1869360
+undercloud_cloud_domain: "localDomain"
+undercloud_undercloud_hostname: "underClou.{{ undercloud_cloud_domain }}"
 undercloud_undercloud_public_host: "{{ ansible_hostname }}-unique"
 tripleo_set_unique_hostname: true
 undercloud_resource_registry_args: