diff --git a/scripts/dashboards_render_atlas.py b/scripts/dashboards_render_atlas.py
index 033850bc8..ef6ccca0a 100644
--- a/scripts/dashboards_render_atlas.py
+++ b/scripts/dashboards_render_atlas.py
@@ -2363,10 +2363,10 @@ def build_overview():
     }
     overview_avg_coverage = f"(avg(({QUALITY_GATE_COVERAGE_BY_SUITE})) or on() vector(0))"
     overview_category_health = (
-        f'avg by (category) ({PLATFORM_TEST_CATEGORY_HEALTH_ROLLUP}{{'
+        f'(avg by (category) ({PLATFORM_TEST_CATEGORY_HEALTH_ROLLUP}{{'
         f'suite=~"{PLATFORM_TEST_SUITE_CANONICAL_MATCHER}",branch!="",branch=~"main|master|origin/main|origin/master",'
         f'category=~"{PLATFORM_TEST_OVERVIEW_CATEGORY_REGEX}"'
-        "})"
+        '})) or label_set(vector(0), "category", "none")'
     )
     for panel_id, title, draw_expr, runtime_expr, y_pos in [
         (40, "Pyrphoros UPS Current", ANANKE_UPS_DRAW_WATTS_DB, ANANKE_UPS_RUNTIME_DB, 7),
diff --git a/scripts/tests/test_dashboards_render_atlas.py b/scripts/tests/test_dashboards_render_atlas.py
index fea6a1976..8b31c4448 100644
--- a/scripts/tests/test_dashboards_render_atlas.py
+++ b/scripts/tests/test_dashboards_render_atlas.py
@@ -150,6 +150,7 @@ def test_overview_uses_readable_quality_power_and_gitops_panels():
     assert panels_by_title["Test Category Health"]["options"]["showValue"] == "auto"
     assert panels_by_title["Test Category Health"]["options"]["rowHeight"] == 0.9
     assert panels_by_title["Test Category Health"]["targets"][0]["legendFormat"] == "{{category}}"
+    assert 'label_set(vector(0), "category", "none")' in panels_by_title["Test Category Health"]["targets"][0]["expr"]
     assert not any(variable["name"] == "overview_suite" for variable in dashboard["templating"]["list"])
 
     pvc_backup_expr = panels_by_title["PVC Backup Health / Age"]["targets"][0]["expr"]
diff --git a/services/monitoring/dashboards/atlas-overview.json b/services/monitoring/dashboards/atlas-overview.json
index 0f1af088c..a97ec2db4 100644
--- a/services/monitoring/dashboards/atlas-overview.json
+++ b/services/monitoring/dashboards/atlas-overview.json
@@ -2819,7 +2819,7 @@
       },
       "targets": [
         {
-          "expr": "avg by (category) (platform_quality:test_category_health_rate:percent_1h{suite=~\"ariadne|metis|ananke|atlasbot|pegasus|soteria|titan_iac|bstein_home|data_prepper|lesavka\",branch!=\"\",branch=~\"main|master|origin/main|origin/master\",category=~\"api|chaos|compatibility|component|contract|e2e|integration|performance|regression|reliability|security|smoke|system|ui\"})",
+          "expr": "(avg by (category) (platform_quality:test_category_health_rate:percent_1h{suite=~\"ariadne|metis|ananke|atlasbot|pegasus|soteria|titan_iac|bstein_home|data_prepper|lesavka\",branch!=\"\",branch=~\"main|master|origin/main|origin/master\",category=~\"api|chaos|compatibility|component|contract|e2e|integration|performance|regression|reliability|security|smoke|system|ui\"})) or label_set(vector(0), \"category\", \"none\")",
           "refId": "A",
           "legendFormat": "{{category}}",
           "format": "time_series",
diff --git a/services/monitoring/grafana-dashboard-overview.yaml b/services/monitoring/grafana-dashboard-overview.yaml
index 740a02789..377ff7c3e 100644
--- a/services/monitoring/grafana-dashboard-overview.yaml
+++ b/services/monitoring/grafana-dashboard-overview.yaml
@@ -2828,7 +2828,7 @@ data:
           },
           "targets": [
             {
-              "expr": "avg by (category) (platform_quality:test_category_health_rate:percent_1h{suite=~\"ariadne|metis|ananke|atlasbot|pegasus|soteria|titan_iac|bstein_home|data_prepper|lesavka\",branch!=\"\",branch=~\"main|master|origin/main|origin/master\",category=~\"api|chaos|compatibility|component|contract|e2e|integration|performance|regression|reliability|security|smoke|system|ui\"})",
+              "expr": "(avg by (category) (platform_quality:test_category_health_rate:percent_1h{suite=~\"ariadne|metis|ananke|atlasbot|pegasus|soteria|titan_iac|bstein_home|data_prepper|lesavka\",branch!=\"\",branch=~\"main|master|origin/main|origin/master\",category=~\"api|chaos|compatibility|component|contract|e2e|integration|performance|regression|reliability|security|smoke|system|ui\"})) or label_set(vector(0), \"category\", \"none\")",
               "refId": "A",
               "legendFormat": "{{category}}",
               "format": "time_series",