diff --git a/src/lib/server/pcd/queries/customFormats/list.ts b/src/lib/server/pcd/queries/customFormats/list.ts
index 3d95b0f..5c1883e 100644
--- a/src/lib/server/pcd/queries/customFormats/list.ts
+++ b/src/lib/server/pcd/queries/customFormats/list.ts
@@ -47,6 +47,21 @@ export async function list(cache: PCDCache): Promise<CustomFormatTableRow[]> {
 		.orderBy('name')
 		.execute();
 
+	// 4. Get test counts for all custom formats
+	const testCounts = await db
+		.selectFrom('custom_format_tests')
+		.select(['custom_format_id'])
+		.select((eb) => eb.fn.count('id').as('count'))
+		.where('custom_format_id', 'in', formatIds)
+		.groupBy('custom_format_id')
+		.execute();
+
+	// Build test count map
+	const testCountMap = new Map<number, number>();
+	for (const tc of testCounts) {
+		testCountMap.set(tc.custom_format_id, Number(tc.count));
+	}
+
 	// Build tags map
 	const tagsMap = new Map<number, Tag[]>();
 	for (const tag of allTags) {
@@ -80,6 +95,7 @@ export async function list(cache: PCDCache): Promise<CustomFormatTableRow[]> {
 		name: format.name,
 		description: format.description,
 		tags: tagsMap.get(format.id) || [],
-		conditions: conditionsMap.get(format.id) || []
+		conditions: conditionsMap.get(format.id) || [],
+		testCount: testCountMap.get(format.id) || 0
 	}));
 }
diff --git a/src/lib/server/pcd/queries/customFormats/types.ts b/src/lib/server/pcd/queries/customFormats/types.ts
index a0a582d..870232a 100644
--- a/src/lib/server/pcd/queries/customFormats/types.ts
+++ b/src/lib/server/pcd/queries/customFormats/types.ts
@@ -19,6 +19,7 @@ export interface CustomFormatTableRow {
 	description: string | null;
 	tags: Tag[];
 	conditions: ConditionRef[];
+	testCount: number;
 }
 
 /** Custom format basic info */
diff --git a/src/routes/custom-formats/[databaseId]/views/CardView.svelte b/src/routes/custom-formats/[databaseId]/views/CardView.svelte
index 54de6fb..c1a105f 100644
--- a/src/routes/custom-formats/[databaseId]/views/CardView.svelte
+++ b/src/routes/custom-formats/[databaseId]/views/CardView.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
 	import type { CustomFormatTableRow } from '$pcd/queries/customFormats';
-	import { Layers } from 'lucide-svelte';
+	import { Layers, FlaskConical } from 'lucide-svelte';
 	import { marked } from 'marked';
 	import { goto } from '$app/navigation';
 	import { page } from '$app/stores';
@@ -32,12 +32,23 @@
 					<h3 class="text-sm font-semibold text-neutral-900 dark:text-neutral-100">
 						{format.name}
 					</h3>
-					<div
-						class="flex flex-shrink-0 items-center gap-1 rounded bg-neutral-100 px-1.5 py-0.5 text-xs text-neutral-600 dark:bg-neutral-800 dark:text-neutral-400"
-						title="{format.conditions.length} condition{format.conditions.length !== 1 ? 's' : ''}"
-					>
-						<Layers size={12} />
-						<span>{format.conditions.length}</span>
+					<div class="flex flex-shrink-0 items-center gap-1.5">
+						<div
+							class="flex items-center gap-1 rounded bg-neutral-100 px-1.5 py-0.5 text-xs text-neutral-600 dark:bg-neutral-800 dark:text-neutral-400"
+							title="{format.conditions.length} condition{format.conditions.length !== 1 ? 's' : ''}"
+						>
+							<Layers size={12} />
+							<span>{format.conditions.length}</span>
+						</div>
+						{#if format.testCount > 0}
+							<div
+								class="flex items-center gap-1 rounded bg-neutral-100 px-1.5 py-0.5 text-xs text-neutral-600 dark:bg-neutral-800 dark:text-neutral-400"
+								title="{format.testCount} test{format.testCount !== 1 ? 's' : ''}"
+							>
+								<FlaskConical size={12} />
+								<span>{format.testCount}</span>
+							</div>
+						{/if}
 					</div>
 				</div>
 				{#if format.tags.length > 0}
diff --git a/src/routes/custom-formats/[databaseId]/views/TableView.svelte b/src/routes/custom-formats/[databaseId]/views/TableView.svelte
index 6158f2c..ef7cb8f 100644
--- a/src/routes/custom-formats/[databaseId]/views/TableView.svelte
+++ b/src/routes/custom-formats/[databaseId]/views/TableView.svelte
@@ -2,7 +2,7 @@
 	import Table from '$ui/table/Table.svelte';
 	import type { Column } from '$ui/table/types';
 	import type { CustomFormatTableRow } from '$pcd/queries/customFormats';
-	import { Tag, FileText, Layers } from 'lucide-svelte';
+	import { Tag, FileText, Layers, FlaskConical } from 'lucide-svelte';
 	import { marked } from 'marked';
 	import { goto } from '$app/navigation';
 	import { page } from '$app/stores';
@@ -99,6 +99,19 @@
 					}).join('')}</div>`
 					: `<span class="text-neutral-400 text-xs">None</span>`
 			})
+		},
+		{
+			key: 'testCount',
+			header: 'Tests',
+			headerIcon: FlaskConical,
+			align: 'center',
+			width: 'w-20',
+			sortable: true,
+			cell: (row: CustomFormatTableRow) => ({
+				html: row.testCount > 0
+					? `<span class="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-neutral-100 text-neutral-700 dark:bg-neutral-800 dark:text-neutral-300">${row.testCount}</span>`
+					: `<span class="text-neutral-400 text-xs">-</span>`
+			})
 		}
 	];
 </script>