diff --git a/tests/templates/globals-default.j2 b/tests/templates/globals-default.j2
index 3bfa7d3817..8e73683a46 100644
--- a/tests/templates/globals-default.j2
+++ b/tests/templates/globals-default.j2
@@ -59,6 +59,7 @@ openstack_tag: "{{ build_image_tag }}"
 {% else %}
 # use the published images from a site mirror of quay.io
 docker_registry: "{{ zuul_site_mirror_fqdn }}:4447"
+docker_registry_insecure: no
 docker_namespace: openstack.kolla
 {% if docker_image_tag_suffix %}
 openstack_tag_suffix: "{{ docker_image_tag_suffix }}"