diff --git a/modules/alert_group/default/0.1/facets.yaml b/modules/alert_group/default/0.1/facets.yaml
index 7919d1f38..e9f77521d 100644
--- a/modules/alert_group/default/0.1/facets.yaml
+++ b/modules/alert_group/default/0.1/facets.yaml
@@ -262,6 +262,7 @@ sample:
   kind: alert_group
   flavor: default
   version: '0.1'
+  metadata: {}
   spec:
     rules:
       high_cpu_usage: