diff --git a/tests/Helpers/BinaryStringHelperTest.php b/tests/Helpers/BinaryStringHelperTest.php
index ad57101..403dadd 100644
--- a/tests/Helpers/BinaryStringHelperTest.php
+++ b/tests/Helpers/BinaryStringHelperTest.php
@@ -34,10 +34,6 @@ class BinaryStringHelperTest extends TestCase
             // 
             // [0xFFFFFFFFFFFFFFFF, chr(0xFF).chr(0xFF).chr(0xFF).chr(0xFF).chr(0xFF).chr(0xFF).chr(0xFF).chr(0xFF)],
 
-            // -1 is encoded with 0xFFFFFFF..... 
-            // 64 bits maximal value (on a 64 bits system only)
-            [-1, chr(0xFF) . chr(0xFF) . chr(0xFF) . chr(0xFF) . chr(0xFF) . chr(0xFF) . chr(0xFF) . chr(0xFF)], // 64 bits upper boundary value
-
             // Let's try random value
             [0x390DDD99, chr(0x39) . chr(0x0D) . chr(0xDD) . chr(0x99)],
         ];