diff --git a/api-v3/test/unit/f7-activity-dossier-regression.test.ts b/api-v3/test/unit/f7-activity-dossier-regression.test.ts
new file mode 100644
index 0000000..c0cc6eb
--- /dev/null
+++ b/api-v3/test/unit/f7-activity-dossier-regression.test.ts
@@ -0,0 +1,47 @@
+import 'reflect-metadata';
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { readFileSync } from 'node:fs';
+import { ActivityDossierService } from '../../src/asset-master/activity-dossier.service';
+
+test('F7 Actividad no usa DISTINCT con ORDER BY COALESCE en visitas', () => {
+  const source = readFileSync('src/asset-master/activity-dossier.service.ts', 'utf8');
+  assert.doesNotMatch(source, /SELECT\s+DISTINCT\s+visit\.id/i);
+  assert.match(source, /ORDER BY COALESCE\(visit\.actual_started_at, visit\.planned_start_at, visit\.created_at\) DESC/);
+  assert.match(source, /EXISTS \(\s*SELECT 1\s*FROM inspection_visit_assets/s);
+});
+
+test('F7 una faceta auxiliar defectuosa no derriba todo el expediente', async () => {
+  const dataSource = {
+    query: async (sql: string) => {
+      if (sql.includes('FROM assets\n       WHERE id = $1')) {
+        return [{
+          id: 'bcba740f-cc84-48b3-8d06-88a9c439e25c',
+          code: 'YAC-0005',
+          name: 'Agua Botada',
+          commonName: null,
+          createdAt: new Date('2026-01-01T00:00:00Z'),
+        }];
+      }
+      if (sql.includes('inspection_finding_communications')) {
+        throw new Error('simulated optional facet failure');
+      }
+      return [];
+    },
+  };
+
+  const service = new ActivityDossierService(dataSource as never);
+  const dossier = await service.dossier('bcba740f-cc84-48b3-8d06-88a9c439e25c') as {
+    asset: { code: string; name: string };
+    counters: { inspections: number; findings: number };
+    warnings: string[];
+    timeline: unknown[];
+  };
+
+  assert.equal(dossier.asset.code, 'YAC-0005');
+  assert.equal(dossier.asset.name, 'Agua Botada');
+  assert.equal(dossier.counters.inspections, 0);
+  assert.equal(dossier.counters.findings, 0);
+  assert.deepEqual(dossier.warnings, ['communications']);
+  assert.deepEqual(dossier.timeline, []);
+});