diff --git a/monitoring/mongodb/alerts.test.yaml b/monitoring/mongodb/alerts.test.yaml
index ea6604184..c70288508 100644
--- a/monitoring/mongodb/alerts.test.yaml
+++ b/monitoring/mongodb/alerts.test.yaml
@@ -330,35 +330,37 @@ tests:
               summary: MongoDB node in STARTUP2 state for too long
     
 
-  - name: MongoDbRSNotSynced
-    interval: 1m
     input_series:
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="PRIMARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-0.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 1x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-1.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 2x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-2.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 2x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="PRIMARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-0.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 1x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-1.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 2x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-2.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 2x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-2", member_state="PRIMARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-0.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 1x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-2", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-1.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 2x10
-      - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-2", member_state="(not reachable/healthy)", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="data-db-mongodb-sharded-shard0-data-2.data-db-mongodb-sharded-headless.zenko.svc.cluster.local:27017"}
-        values: 2 _ _ _ _ _ _ _ _ _
-
-    alert_rule_test:
-      - alertname: MongoDbRSNotSynced
-        eval_time: 10m
-        exp_alerts:
-          - exp_labels:
-              severity: warning
-              rs_nm: data-db-mongodb-sharded-shard-0
-            exp_annotations:
-              description: "MongoDB replica set `data-db-mongodb-sharded-shard-0` is not in the expected state. Please ensure that all instances are running properly."
-              summary: MongoDB replica set out of sync
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="PRIMARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-0"}
+      values: 1x10 1x10
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-1"}
+      values: 2x10 2x10
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-2"}
+      values: 2x10 stale
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-0", member_state="(not reachable/healthy)", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-2"}
+      values: _x10 8x10
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="PRIMARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-0"}
+      values: 1x10 1x10
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-1"}
+      values: 2x10 2x10
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-2"}
+      values: 2x10 stale
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-1", member_state="(not reachable/healthy)", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-2"}
+      values: _x10 8x10
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-2", member_state="PRIMARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-0"}
+      values: 1x10 stale
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-2", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-1"}
+      values: 2x10 stale
+    - series: mongodb_rs_members_state{namespace="zenko", pod="data-db-mongodb-sharded-shard0-data-2", member_state="SECONDARY", rs_nm="data-db-mongodb-sharded-shard-0", member_idx="shard0-data-2"}
+      values: 2x10 stale
+  
+  alert_rule_test:
+    - alertname: MongoDbRSNotSynced
+      eval_time: 10m
+      exp_alerts:
+        - exp_labels:
+            severity: warning
+            rs_nm: data-db-mongodb-sharded-shard-0
+          exp_annotations:
+            description: "MongoDB replica set `data-db-mongodb-sharded-shard-0` is not in the expected state. It does not have the expected number of SECONDARY members. Please ensure that all instances are running properly."
+            summary: MongoDB replica set out of sync
diff --git a/monitoring/mongodb/alerts.yaml b/monitoring/mongodb/alerts.yaml
index f57e912af..cdbe2b3c8 100644
--- a/monitoring/mongodb/alerts.yaml
+++ b/monitoring/mongodb/alerts.yaml
@@ -183,10 +183,10 @@ groups:
 
   - alert: MongoDbRSNotSynced
     expr: |
-      group by(rs_nm)(count by (rs_nm, pod)(mongodb_rs_members_state{namespace="${namespace}", pod=~"${service}.*", member_state="SECONDARY"}) != (${replicas} - 1) )
+      group by(rs_nm) ( count by(rs_nm, pod) (mongodb_rs_members_state{namespace="${namespace}", pod=~"${service}.*", member_state="SECONDARY"}) != (${replicas} - 1) )
     for: 10m
     labels:
       severity: warning
     annotations:
-      description: "MongoDB replica set `{{ $labels.rs_nm }}` is not in the expected state. Please ensure that all instances are running properly."
+      description: "MongoDB replica set `{{ $labels.rs_nm }}` is not in the expected state. It does not have the expected number of SECONDARY members. Please ensure that all instances are running properly."
       summary: MongoDB replica set out of sync