diff --git a/app/tests/unit/src/Model/MediosPago/Toku/CustomerTest.php b/app/tests/unit/src/Model/MediosPago/Toku/CustomerTest.php
index 3b968fc..a1fd389 100644
--- a/app/tests/unit/src/Model/MediosPago/Toku/CustomerTest.php
+++ b/app/tests/unit/src/Model/MediosPago/Toku/CustomerTest.php
@@ -45,7 +45,7 @@ class CustomerTest extends TestCase
 
         $expected = json_encode([
             'id' => $id,
-            'rut' => implode('', [$persona->rut, $persona->digito]),
+            'rut' => implode('', [$persona->rut, strtoupper($persona->digito)]),
             'toku_id' => $toku_id
         ]);
         $this->assertJsonStringEqualsJsonString($expected, json_encode($customer));