diff --git a/global/overlay/etc/puppet/cosmos-rules.yaml b/global/overlay/etc/puppet/cosmos-rules.yaml
index 4e218b45..1f847315 100644
--- a/global/overlay/etc/puppet/cosmos-rules.yaml
+++ b/global/overlay/etc/puppet/cosmos-rules.yaml
@@ -1191,3 +1191,11 @@ idm-sto1-test-db-2\.komreg\.net:
        - 89.47.184.180
        - 89.47.185.105
        - 89.45.236.171
+
+idm-sto3-test-db-3\.komreg\.net:
+   sunet::dockerhost2:
+   eid::idm_db:
+     cluster_nodes:
+       - 89.47.184.180
+       - 89.47.185.105
+       - 89.45.236.171