diff --git a/e2e/tests/constants.py b/e2e/tests/constants.py
index 5c3a64d6d..dea17438e 100644
--- a/e2e/tests/constants.py
+++ b/e2e/tests/constants.py
@@ -1,4 +1,4 @@
-LEADER_LABEL_VALUE = "master" # master or primary
+LEADER_LABEL_VALUE = "master" # value should be the same as in the configmap: pod_leader_label_value
 SPILO_CURRENT = "registry.opensource.zalan.do/acid/spilo-16-e2e:0.1"
 SPILO_LAZY = "registry.opensource.zalan.do/acid/spilo-16-e2e:0.2"
 SPILO_FULL_IMAGE = "ghcr.io/zalando/spilo-16:3.2-p3"
diff --git a/pkg/cluster/cluster.go b/pkg/cluster/cluster.go
index dc1108139..67548333f 100644
--- a/pkg/cluster/cluster.go
+++ b/pkg/cluster/cluster.go
@@ -837,6 +837,10 @@ func (c *Cluster) compareServices(old, new *v1.Service) (bool, string) {
 		}
 	}
 
+	if !reflect.DeepEqual(old.Labels, new.Labels) {
+		return false, "new service's labels do not match the current ones"
+	}
+
 	if !reflect.DeepEqual(old.ObjectMeta.OwnerReferences, new.ObjectMeta.OwnerReferences) {
 		return false, "new service's owner references do not match the current ones"
 	}