diff --git a/zaza/openstack/charm_tests/tempest/templates/tempest_v3.j2 b/zaza/openstack/charm_tests/tempest/templates/tempest_v3.j2
index 674afecec..7f489c11c 100644
--- a/zaza/openstack/charm_tests/tempest/templates/tempest_v3.j2
+++ b/zaza/openstack/charm_tests/tempest/templates/tempest_v3.j2
@@ -153,7 +153,7 @@ flavor_id = {{ flavor_ref }}
 dns_nameserver = {{ test_name_server }}
 network_driver = flannel
 {%- if test_registry_prefix %}
-labels = container_infra_prefix:{{ test_registry_prefix }}
+labels = container_infra_prefix={{ test_registry_prefix }}
 insecure_registry = {{ test_registry_prefix }}
 {%- endif %}
 {%- endif %}