diff --git a/ariadne/services/cluster_state_health.py b/ariadne/services/cluster_state_health.py
index 965461a..a20c3dc 100644
--- a/ariadne/services/cluster_state_health.py
+++ b/ariadne/services/cluster_state_health.py
@@ -4,12 +4,10 @@ from typing import Any
 
 from .cluster_state_contract import *
 
-def _health_bullets(
-    metrics: dict[str, Any],
-    nodes_summary: dict[str, Any],
-    workloads_health: dict[str, Any],
-    anomalies: list[dict[str, Any]],
-) -> list[str]:
+HealthRows = list[dict[str, Any]]
+
+
+def _health_bullets(metrics: dict[str, Any], nodes_summary: dict[str, Any], workloads_health: dict[str, Any], anomalies: HealthRows) -> list[str]:
     bullets: list[str] = []
     nodes_total = metrics.get("nodes_total")
     nodes_ready = metrics.get("nodes_ready")
diff --git a/tests/unit/services/test_cluster_state_context_domains.py b/tests/unit/services/test_cluster_state_context_domains.py
index b2b01eb..42e6e9f 100644
--- a/tests/unit/services/test_cluster_state_context_domains.py
+++ b/tests/unit/services/test_cluster_state_context_domains.py
@@ -236,3 +236,32 @@ def test_profile_builders_filter_bad_nodes_and_workload_nodes() -> None:
 
     assert workload_profiles[0]["nodes_top"] == [("titan-1", 2), ("titan-2", 1)]
     assert workload_profiles[1]["nodes_top"] == []
+
+
+def test_health_helpers_handle_clean_and_malformed_inputs() -> None:
+    bullets = health._health_bullets(
+        {"pods_running": 1, "pods_pending": 0, "pods_failed": 0},
+        {},
+        {"deployments": {"not_ready": 0}, "statefulsets": "bad", "daemonsets": {}},
+        [{"summary": ""}],
+    )
+    assert bullets == ["Pods: 1 running, 0 pending, 0 failed", "Workloads: all ready"]
+
+    workload_items = health._workload_not_ready_items(
+        {
+            "deployments": {"items": [None, {"namespace": "apps", "name": "api", "desired": 2, "ready": 1}]},
+            "statefulsets": {"items": "bad"},
+        }
+    )
+    assert workload_items == [{"kind": "deployment", "namespace": "apps", "name": "api", "desired": 2, "ready": 1}]
+
+    restarts = health._pod_restarts_top(
+        {
+            "top_restarts_1h": [
+                None,
+                {"metric": {"namespace": "apps"}, "value": 3},
+                {"metric": {"namespace": "apps", "pod": "api"}, "value": 2},
+            ]
+        }
+    )
+    assert restarts == [{"namespace": "apps", "pod": "api", "value": 2}]