diff --git a/tests/Unit/OuTreeServiceTest.php b/tests/Unit/OuTreeServiceTest.php
index a8933ea..90e8106 100644
--- a/tests/Unit/OuTreeServiceTest.php
+++ b/tests/Unit/OuTreeServiceTest.php
@@ -114,7 +114,11 @@ class OuTreeServiceTest extends TestCase
         Mockery::mock('alias:\LdapRecord\Models\ActiveDirectory\OrganizationalUnit')
             ->shouldReceive('query')->twice()->andReturn($query);
 
-        $service = new OuTreeService;
+        // Ten test sprawdza wyłącznie kształt drzewa (ograniczenie do rootów +
+        // zagnieżdżenie), nie liczniki - a countObjectsInOu() odpytałoby realny
+        // LDAP. Podstawiamy 0.
+        $service = Mockery::mock(OuTreeService::class)->makePartial()->shouldAllowMockingProtectedMethods();
+        $service->shouldReceive('countObjectsInOu')->andReturn(0);
 
         $userTree = $service->tree('users');
         $computerTree = $service->tree('computers');