diff --git a/tests/PHPUnit/Components/ApplePayDirect/Services/ApplePayDirectDomainSanitizerTest.php b/tests/PHPUnit/Components/ApplePayDirect/Services/ApplePayDirectDomainSanitizerTest.php
index 010c788bc..f6bccbdb5 100644
--- a/tests/PHPUnit/Components/ApplePayDirect/Services/ApplePayDirectDomainSanitizerTest.php
+++ b/tests/PHPUnit/Components/ApplePayDirect/Services/ApplePayDirectDomainSanitizerTest.php
@@ -34,6 +34,7 @@ public function sanitationTestDataProvider(): array
             'removes shop language slug if provided' => ['https://example.com/shop/de', 'example.com'],
             'removes shop language slug and trailing slash if provided' => ['example.com/shop/de/', 'example.com'],
             'removes shop language slug and trailing slash if provided and protocol' => ['https://example.com/shop/de/', 'example.com'],
+            'sub domains are not removed' => ['sub.example.com', 'sub.example.com'],
         ];
     }
 }
\ No newline at end of file