diff --git a/tests/Functional/Net/SFTPLargeFileTest.php b/tests/Functional/Net/SFTPLargeFileTest.php
index 1c78f496..965e1e93 100644
--- a/tests/Functional/Net/SFTPLargeFileTest.php
+++ b/tests/Functional/Net/SFTPLargeFileTest.php
@@ -15,17 +15,10 @@ class Functional_Net_SFTPLargeFileTest extends PhpseclibFunctionalTestCase
 
     static public function setUpBeforeClass()
     {
-        if (!extension_loaded('mcrypt')) {
-            self::markTestSkipped('This test depends on mcrypt for performance.');
+        if (!extension_loaded('mcrypt') && !extension_loaded('openssl')) {
+            self::markTestSkipped('This test depends on mcrypt or openssl for performance.');
         }
         parent::setUpBeforeClass();
-        self::ensureConstant('CRYPT_AES_MODE', CRYPT_MODE_MCRYPT);
-        self::ensureConstant('CRYPT_BLOWFISH_MODE', CRYPT_MODE_MCRYPT);
-        self::ensureConstant('CRYPT_DES_MODE', CRYPT_MODE_MCRYPT);
-        self::ensureConstant('CRYPT_RC2_MODE', CRYPT_MODE_MCRYPT);
-        self::ensureConstant('CRYPT_RC4_MODE', CRYPT_MODE_MCRYPT);
-        self::ensureConstant('CRYPT_RIJNDAEL_MODE', CRYPT_MODE_MCRYPT);
-        self::ensureConstant('CRYPT_TWOFISH_MODE', CRYPT_MODE_MCRYPT);
     }
 
     public function setUp()