diff --git a/tests/unit/server.test.ts b/tests/unit/server.test.ts
index 80ba6e5..cc99bf9 100644
--- a/tests/unit/server.test.ts
+++ b/tests/unit/server.test.ts
@@ -61,8 +61,9 @@ beforeEach(() => {
   // Ensure database is initialized (recreates tables if dropped)
   initializeDatabase(testDb);
   
-  // Reset database state between tests
-  testDb.exec('DELETE FROM task_assignments');
+  // Reset database state between tests (borrar raíz primero; ON DELETE CASCADE limpia assignments)
+  testDb.exec('DELETE FROM response_queue');
+  try { testDb.exec('DELETE FROM task_origins'); } catch {}
   testDb.exec('DELETE FROM tasks');
   testDb.exec('DELETE FROM users');
   testDb.exec('DELETE FROM groups');
diff --git a/tests/unit/server/webhook.reactions.e2e.test.ts b/tests/unit/server/webhook.reactions.e2e.test.ts
index 554de6e..dc83a9e 100644
--- a/tests/unit/server/webhook.reactions.e2e.test.ts
+++ b/tests/unit/server/webhook.reactions.e2e.test.ts
@@ -52,7 +52,7 @@ describe('WebhookServer E2E - reacciones por comando', () => {
     };
     memdb.exec(`
       DELETE FROM response_queue;
-      DELETE FROM task_assignments;
+      DELETE FROM task_origins;
       DELETE FROM tasks;
       DELETE FROM users;
       DELETE FROM groups;
diff --git a/tests/unit/tasks/complete-reaction.test.ts b/tests/unit/tasks/complete-reaction.test.ts
index ecc293d..a891b59 100644
--- a/tests/unit/tasks/complete-reaction.test.ts
+++ b/tests/unit/tasks/complete-reaction.test.ts
@@ -36,10 +36,9 @@ describe('TaskService - reacción ✅ al completar (Fase 2)', () => {
 
     memdb.exec(`
       DELETE FROM response_queue;
-      DELETE FROM task_assignments;
+      DELETE FROM task_origins;
       DELETE FROM tasks;
       DELETE FROM users;
-      DELETE FROM task_origins;
       DELETE FROM allowed_groups;
     `);
   });