diff --git a/apps/nestjs-backend/src/features/auth/permission.service.spec.ts b/apps/nestjs-backend/src/features/auth/permission.service.spec.ts
index 7c150c881..67fadefb3 100644
--- a/apps/nestjs-backend/src/features/auth/permission.service.spec.ts
+++ b/apps/nestjs-backend/src/features/auth/permission.service.spec.ts
@@ -51,7 +51,8 @@ describe('PermissionService', () => {
     it('should throw a ForbiddenException if collaborator is not found', async () => {
       const spaceId = 'space-id';
       prismaServiceMock.collaborator.findMany.mockResolvedValue([]);
-      await expect(service['getRoleBySpaceId'](spaceId)).toBeNull();
+      const result = await service['getRoleBySpaceId'](spaceId);
+      await expect(result).toBeNull();
     });
   });