diff --git a/tests/EmailValidator/Validation/RFCValidationTest.php b/tests/EmailValidator/Validation/RFCValidationTest.php
index f910c64..84c9475 100644
--- a/tests/EmailValidator/Validation/RFCValidationTest.php
+++ b/tests/EmailValidator/Validation/RFCValidationTest.php
@@ -149,6 +149,8 @@ class RFCValidationTest extends TestCase
             ['\r\n \r\n test@iana.org'],
             ['test;123@foobar.com'],
             ['examp║le@symfony.com'],
+            ['0'],
+            [0],
         ];
     }