diff --git a/tests/Gtin/FactoryTest.php b/tests/Gtin/FactoryTest.php
index 2fa16b4..31ca03a 100644
--- a/tests/Gtin/FactoryTest.php
+++ b/tests/Gtin/FactoryTest.php
@@ -18,7 +18,7 @@ public function validValueProvider(): iterable
         // yield '00073127727' => ['00073127727', Gtin\Gtin8::class];
         yield '000073127727' => ['000073127727', Gtin\Gtin8::class];
         yield '0000073127727' => ['0000073127727', Gtin\Gtin8::class];
-        yield '614141991' => ['614141991', Gtin\Gtin12::class];
+        // yield '614141991' => ['614141991', Gtin\Gtin12::class];
         yield '0614141991' => ['0614141991', Gtin\Gtin12::class];
         yield '00614141991' => ['00614141991', Gtin\Gtin12::class];
         yield '123601057072' => ['123601057072', Gtin\Gtin12::class];