diff --git a/tests/unit/services/test_cluster_state_vm_domains.py b/tests/unit/services/test_cluster_state_vm_domains.py
index d897c6f..34cbd56 100644
--- a/tests/unit/services/test_cluster_state_vm_domains.py
+++ b/tests/unit/services/test_cluster_state_vm_domains.py
@@ -279,3 +279,64 @@ def test_vm_usage_error_paths(monkeypatch) -> None:
     assert vm_usage._percentile([], 0.5) is None
     assert vm_usage._node_load_summary([]) == {}
     assert vm_usage._namespace_capacity_summary([]) == {}
+
+
+def test_vm_usage_filters_invalid_metric_inputs(monkeypatch) -> None:
+    monkeypatch.setattr(
+        vm_usage,
+        "_vm_vector",
+        lambda _expr: [
+            {"metric": "bad", "value": 1.0},
+            {"metric": {"namespace": ""}, "value": 2.0},
+            {"metric": {"namespace": "bad"}, "value": "not-a-number"},
+            {"metric": {"namespace": "apps"}, "value": "3.5"},
+        ],
+    )
+
+    assert vm_usage._usage_stats(["bad", {"value": None}, {"value": "5.5"}]) == {
+        "min": 5.5,
+        "max": 5.5,
+        "avg": 5.5,
+    }
+    assert vm_usage._vm_namespace_totals("expr") == {"apps": 3.5}
+
+    profile = vm_usage._node_usage_profile(
+        {
+            "cpu": [
+                {"node": "", "value": 1.0},
+                {"node": "titan-2", "value": "hot"},
+                {"node": "titan-1", "value": 4.0},
+            ],
+            "ram": [{"node": "titan-1", "value": 2.0}],
+        },
+        [{"name": "titan-1", "pressure": [], "taints": "bad", "unschedulable": True}],
+        ["bad"],
+    )
+    assert profile == [
+        {
+            "node": "titan-1",
+            "cpu": 4.0,
+            "ram": 2.0,
+            "disk": None,
+            "net": None,
+            "io": None,
+            "cpu_norm": 1.0,
+            "ram_norm": 1.0,
+            "pressure_flags": {},
+            "pressure_count": 0,
+            "taints": [],
+            "unschedulable": True,
+            "pods_total": None,
+            "load_index": 1.0,
+        }
+    ]
+
+    summary = vm_usage._namespace_capacity_summary(
+        [
+            "bad",
+            {"namespace": "apps", "cpu_usage": 3.0, "cpu_requests": 2.0},
+            {"namespace": "media", "mem_usage": 4.0, "mem_requests": 2.0, "mem_usage_ratio": 2.0},
+        ]
+    )
+    assert summary["cpu_overcommitted"] == 0
+    assert summary["mem_overcommitted_names"] == ["media"]