diff --git a/tests/Unit/Crypt/AES/TestCase.php b/tests/Unit/Crypt/AES/TestCase.php
index 51434fc2..6a984aaa 100644
--- a/tests/Unit/Crypt/AES/TestCase.php
+++ b/tests/Unit/Crypt/AES/TestCase.php
@@ -385,35 +385,6 @@ abstract class TestCase extends PhpseclibTestCase
         $this->assertSame($aes->getKeyLength(), 256);
     }
 
-    public function testInvalidLengthKeyWithAES()
-    {
-        $plaintext = str_repeat('x', 16);
-
-        $aes = new Crypt_Rijndael();
-        $aes->setKey(str_repeat('a', 19));
-        $this->assertSame($aes->getKeyLength(), 160);
-
-        $ref = new Crypt_Rijndael();
-        $ref->setKey(str_repeat('a', 19) . "\0");
-        $this->assertSame(
-            bin2hex($aes->encrypt($plaintext)),
-            bin2hex($ref->encrypt($plaintext)),
-            'actual and expected value do not match for 168 bit Rijndael'
-        );
-
-        $aes = new Crypt_AES();
-        $aes->setKey(str_repeat('a', 19));
-        $this->assertSame($aes->getKeyLength(), 192);
-
-        $ref = new Crypt_AES();
-        $ref->setKey(str_repeat('a', 19) . "\0\0\0\0\0");
-        $this->assertSame(
-            bin2hex($aes->encrypt($plaintext)),
-            bin2hex($ref->encrypt($plaintext)),
-            'actual and expected value do not match for 168 bit AES'
-        );
-    }
-
     /**
      * @group github938
      */