diff --git a/tests/Unit/Crypt/AES/InternalTest.php b/tests/Unit/Crypt/AES/InternalTest.php
index 8c1d1f37..75e89edf 100644
--- a/tests/Unit/Crypt/AES/InternalTest.php
+++ b/tests/Unit/Crypt/AES/InternalTest.php
@@ -9,6 +9,6 @@ class Unit_Crypt_AES_InternalTest extends Unit_Crypt_AES_TestCase
 {
     protected function setUp()
     {
-        $this->engine = CRYPT_MODE_INTERNAL;
+        $this->engine = CRYPT_ENGINE_INTERNAL;
     }
 }
diff --git a/tests/Unit/Crypt/AES/McryptTest.php b/tests/Unit/Crypt/AES/McryptTest.php
index 3dd1f9d1..41fa2041 100644
--- a/tests/Unit/Crypt/AES/McryptTest.php
+++ b/tests/Unit/Crypt/AES/McryptTest.php
@@ -9,6 +9,6 @@ class Unit_Crypt_AES_McryptTest extends Unit_Crypt_AES_TestCase
 {
     protected function setUp()
     {
-        $this->engine = CRYPT_MODE_MCRYPT;
+        $this->engine = CRYPT_ENGINE_MCRYPT;
     }
 }
diff --git a/tests/Unit/Crypt/AES/OpenSSLTest.php b/tests/Unit/Crypt/AES/OpenSSLTest.php
index ff950d08..ddb5de67 100644
--- a/tests/Unit/Crypt/AES/OpenSSLTest.php
+++ b/tests/Unit/Crypt/AES/OpenSSLTest.php
@@ -9,6 +9,6 @@ class Unit_Crypt_AES_OpenSSLTest extends Unit_Crypt_AES_TestCase
 {
     protected function setUp()
     {
-        $this->engine = CRYPT_MODE_OPENSSL;
+        $this->engine = CRYPT_ENGINE_OPENSSL;
     }
 }
diff --git a/tests/Unit/Crypt/DES.php b/tests/Unit/Crypt/DES.php
index 4d9e0aad..cf35fc6e 100644
--- a/tests/Unit/Crypt/DES.php
+++ b/tests/Unit/Crypt/DES.php
@@ -17,19 +17,19 @@ class Unit_Crypt_DES_TestCase extends PhpseclibTestCase
         $des->setKey('d');
         $des->setIV('d');
 
-        $des->setPreferredEngine(CRYPT_MODE_INTERNAL);
+        $des->setPreferredEngine(CRYPT_ENGINE_INTERNAL);
         $internal = $des->encrypt('d');
 
-        $des->setPreferredEngine(CRYPT_MODE_MCRYPT);
-        if ($des->getEngine() == CRYPT_MODE_MCRYPT) {
+        $des->setPreferredEngine(CRYPT_ENGINE_MCRYPT);
+        if ($des->getEngine() == CRYPT_ENGINE_MCRYPT) {
             $mcrypt = $des->encrypt('d');
             $this->assertEquals($internal, $mcrypt, 'Failed asserting that the internal and mcrypt engines produce identical results');
         } else {
             self::markTestSkipped('Unable to initialize mcrypt engine');
         }
 
-        $des->setPreferredEngine(CRYPT_MODE_OPENSSL);
-        if ($des->getEngine() == CRYPT_MODE_OPENSSL) {
+        $des->setPreferredEngine(CRYPT_ENGINE_OPENSSL);
+        if ($des->getEngine() == CRYPT_ENGINE_OPENSSL) {
             $openssl = $des->encrypt('d');
             $this->assertEquals($internal, $openssl,  'Failed asserting that the internal and OpenSSL engines produce identical results');
         } else {
@@ -47,19 +47,19 @@ class Unit_Crypt_DES_TestCase extends PhpseclibTestCase
         //$des->setKey();
         //$des->setIV();
 
-        $des->setPreferredEngine(CRYPT_MODE_INTERNAL);
+        $des->setPreferredEngine(CRYPT_ENGINE_INTERNAL);
         $internal = $des->decrypt('d');
 
-        $des->setPreferredEngine(CRYPT_MODE_MCRYPT);
-        if ($des->getEngine() == CRYPT_MODE_MCRYPT) {
+        $des->setPreferredEngine(CRYPT_ENGINE_MCRYPT);
+        if ($des->getEngine() == CRYPT_ENGINE_MCRYPT) {
             $mcrypt = $des->decrypt('d');
             $this->assertEquals($internal, $mcrypt, 'Failed asserting that the internal and mcrypt engines produce identical results');
         } else {
             self::markTestSkipped('Unable to initialize mcrypt engine');
         }
 
-        $des->setPreferredEngine(CRYPT_MODE_OPENSSL);
-        if ($des->getEngine() == CRYPT_MODE_OPENSSL) {
+        $des->setPreferredEngine(CRYPT_ENGINE_OPENSSL);
+        if ($des->getEngine() == CRYPT_ENGINE_OPENSSL) {
             $openssl = $des->decrypt('d');
             $this->assertEquals($internal, $openssl,  'Failed asserting that the internal and OpenSSL engines produce identical results');
         } else {
diff --git a/tests/Unit/Crypt/RC2.php b/tests/Unit/Crypt/RC2.php
index 7d61c33d..6803aca3 100644
--- a/tests/Unit/Crypt/RC2.php
+++ b/tests/Unit/Crypt/RC2.php
@@ -49,19 +49,19 @@ class Unit_Crypt_RC2_TestCase extends PhpseclibTestCase
 
         $rc2->setKey(str_repeat('d', 16), 128);
 
-        $rc2->setPreferredEngine(CRYPT_MODE_INTERNAL);
+        $rc2->setPreferredEngine(CRYPT_ENGINE_INTERNAL);
         $internal = $rc2->encrypt('d');
 
-        $rc2->setPreferredEngine(CRYPT_MODE_MCRYPT);
-        if ($rc2->getEngine() == CRYPT_MODE_MCRYPT) {
+        $rc2->setPreferredEngine(CRYPT_ENGINE_MCRYPT);
+        if ($rc2->getEngine() == CRYPT_ENGINE_MCRYPT) {
             $mcrypt = $rc2->encrypt('d');
             $this->assertEquals($internal, $mcrypt, 'Failed asserting that the internal and mcrypt engines produce identical results');
         } else {
             self::markTestSkipped('Unable to initialize mcrypt engine');
         }
 
-        $rc2->setPreferredEngine(CRYPT_MODE_OPENSSL);
-        if ($rc2->getEngine() == CRYPT_MODE_OPENSSL) {
+        $rc2->setPreferredEngine(CRYPT_ENGINE_OPENSSL);
+        if ($rc2->getEngine() == CRYPT_ENGINE_OPENSSL) {
             $openssl = $rc2->encrypt('d');
             $this->assertEquals($internal, $openssl,  'Failed asserting that the internal and OpenSSL engines produce identical results');
         } else {