diff --git a/api-v3/test/unit/phase-f4-recurrence.test.ts b/api-v3/test/unit/phase-f4-recurrence.test.ts
new file mode 100644
index 0000000..edad9e3
--- /dev/null
+++ b/api-v3/test/unit/phase-f4-recurrence.test.ts
@@ -0,0 +1,39 @@
+import 'reflect-metadata';
+import assert from 'node:assert/strict';
+import fs from 'node:fs';
+import path from 'node:path';
+import test from 'node:test';
+import { REQUIRED_PERMISSIONS_KEY } from '../../src/authorization/decorators/require-permissions.decorator';
+import { InspectionFindingRecurrenceController } from '../../src/inspection-findings/inspection-finding-recurrence.controller';
+
+const root = process.cwd();
+const read = (relative: string) => fs.readFileSync(path.join(root, relative), 'utf8');
+
+function permissions(method: string): string[] {
+  const handler = InspectionFindingRecurrenceController.prototype[
+    method as keyof InspectionFindingRecurrenceController
+  ];
+  return Reflect.getMetadata(REQUIRED_PERMISSIONS_KEY, handler) as string[];
+}
+
+test('F4 exposes recurrence candidates for the selected Inventory and creates a new Finding', () => {
+  assert.deepEqual(permissions('candidates'), ['inspection_findings.read']);
+  assert.deepEqual(permissions('create'), ['inspection_findings.create']);
+});
+
+test('F4 recurrence only accepts an unresolved prior Finding from the same Inventory context', () => {
+  const service = read('src/inspection-findings/inspection-finding-recurrence.service.ts');
+  assert.match(service, /finding\.status = 'OPEN'/);
+  assert.match(service, /INSPECTION_FINDING_ANTECEDENT_RESOLVED/);
+  assert.match(service, /INSPECTION_FINDING_RECURRENCE_ASSET_NOT_IN_ACT/);
+  assert.match(service, /finding\.act_id <> \$2/);
+});
+
+test('F4 creates recurrence append-only as a new Finding linked to its antecedent', () => {
+  const service = read('src/inspection-findings/inspection-finding-recurrence.service.ts');
+  assert.match(service, /is_recurrence/);
+  assert.match(service, /antecedent_finding_id/);
+  assert.match(service, /INSERT INTO inspection_finding_versions/);
+  assert.match(service, /recurrence: true/);
+  assert.doesNotMatch(service, /UPDATE inspection_findings[\s\S]*antecedentFindingId/);
+});