diff --git a/tests/Feature/CreditTest.php b/tests/Feature/CreditTest.php
index 0562f2fd16a7..9a6e078d4ac7 100644
--- a/tests/Feature/CreditTest.php
+++ b/tests/Feature/CreditTest.php
@@ -104,7 +104,7 @@ class CreditTest extends TestCase
             'number' => 'dfdfd',
             'discount' => 0,
             'is_amount_discount' => 1,
-            'number' => '3434343',
+            'number' => '34343xx43',
             'public_notes' => 'notes',
             'is_deleted' => 0,
             'custom_value1' => 0,