diff --git a/tests/Unit/Crypt/AES/TestCase.php b/tests/Unit/Crypt/AES/TestCase.php
index 6e7f8d65..3c1a923b 100644
--- a/tests/Unit/Crypt/AES/TestCase.php
+++ b/tests/Unit/Crypt/AES/TestCase.php
@@ -11,7 +11,7 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
 {
     protected $engine;
 
-    private function checkEngine($aes)
+    private function _checkEngine($aes)
     {
         if ($aes->getEngine() != $this->engine) {
             $engine = 'internal';
@@ -78,7 +78,7 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
         $aes->setIV($iv);
         $aes->setKey($key);
 
-        $this->checkEngine($aes);
+        $this->_checkEngine($aes);
 
         $actual = '';
         for ($i = 0, $strlen = strlen($plaintext); $i < $strlen; ++$i) {
@@ -100,7 +100,7 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
         $aes->setPreferredEngine($this->engine);
         $aes->disablePadding();
         $aes->setKey(pack('H*', '2b7e151628aed2a6abf7158809cf4f3c762e7160')); // 160-bit key. Valid in Rijndael.
-        //$this->checkEngine($aes); // should only work in internal mode
+        //$this->_checkEngine($aes); // should only work in internal mode
         $ciphertext = $aes->encrypt(pack('H*', '3243f6a8885a308d313198a2e0370734'));
         $this->assertEquals($ciphertext, pack('H*', '231d844639b31b412211cfe93712b880'));
     }
@@ -116,7 +116,7 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
         $aes->setPreferredEngine($this->engine);
         $aes->disablePadding();
         $aes->setKey(pack('H*', '2b7e151628aed2a6abf7158809cf4f3c762e7160')); // 160-bit key. AES should null pad to 192-bits
-        $this->checkEngine($aes);
+        $this->_checkEngine($aes);
         $ciphertext = $aes->encrypt(pack('H*', '3243f6a8885a308d313198a2e0370734'));
         $this->assertEquals($ciphertext, pack('H*', 'c109292b173f841b88e0ee49f13db8c0'));
     }
@@ -135,10 +135,10 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
         );
 
         $combos = array(
-	     array(16),
-	     array(17),
-	     array(1, 16),
-	     array(3, 6, 7), // (3 to test the openssl_encrypt call and the buffer creation, 6 to test the exclusive use of the buffer and 7 to test the buffer's exhaustion and recreation)
+             array(16),
+             array(17),
+             array(1, 16),
+             array(3, 6, 7), // (3 to test the openssl_encrypt call and the buffer creation, 6 to test the exclusive use of the buffer and 7 to test the buffer's exhaustion and recreation)
             array(15, 4), // (15 to test openssl_encrypt call and buffer creation and 4 to test something that spans multpile bloc
             array(3, 6, 10, 16), // this is why the strlen check in the buffer-only code was needed
             array(16, 16), // two full size blocks
@@ -176,7 +176,7 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
         $aes->setKey($key);
         $aes->setIV($iv);
 
-        $this->checkEngine($aes);
+        $this->_checkEngine($aes);
 
         $str = '';
         $result = '';
@@ -193,7 +193,7 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
         $aes->setKey($key);
         $aes->setIV($iv);
 
-        $this->checkEngine($aes);
+        $this->_checkEngine($aes);
 
         foreach ($test as $len) {
             $temp = str_repeat('d', $len);
@@ -205,4 +205,4 @@ abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
 
         $this->assertSame(bin2hex($c1), bin2hex($c2));
     }
-}
\ No newline at end of file
+}
diff --git a/tests/Unit/Crypt/DES.php b/tests/Unit/Crypt/DES.php
index 3b6d5a4b..4d9e0aad 100644
--- a/tests/Unit/Crypt/DES.php
+++ b/tests/Unit/Crypt/DES.php
@@ -66,4 +66,4 @@ class Unit_Crypt_DES_TestCase extends PhpseclibTestCase
             self::markTestSkipped('Unable to initialize OpenSSL engine');
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/Unit/Crypt/RC2.php b/tests/Unit/Crypt/RC2.php
index 545df9b5..7d61c33d 100644
--- a/tests/Unit/Crypt/RC2.php
+++ b/tests/Unit/Crypt/RC2.php
@@ -21,7 +21,7 @@ class Unit_Crypt_RC2_TestCase extends PhpseclibTestCase
         // admittedly, phpseclib is inconsistent in this regard. RC4 and Blowfish support arbitrary key lengths between a certain range, as well,
         // and they don't have any way to set the key length. but then again, neither do those algorithms have their own key expansion algorithm,
         // whereas RC2 does. and technically, AES / Rijndael (and even Twofish) don't support arbitrary key lengths - they support variable key
-        // lengths. so in some ways, i suppose this inconsistency somewhat makes sense, although the fact that Crypt_Twofish doesn't have a 
+        // lengths. so in some ways, i suppose this inconsistency somewhat makes sense, although the fact that Crypt_Twofish doesn't have a
         // setKeyLength() function whereas Crypt_AES / Crypt_Rijndael do not is, itself, an inconsistency.
 
         // but that said, Crypt_RC2 is inconsistent in other ways: if you pass a 128-bit (16-byte) key to it via setKey() the key is not treated
@@ -68,4 +68,4 @@ class Unit_Crypt_RC2_TestCase extends PhpseclibTestCase
             self::markTestSkipped('Unable to initialize OpenSSL engine');
         }
     }
-}
\ No newline at end of file
+}