diff --git a/tests/Math/BigInteger/BCMathTest.php b/tests/Math/BigInteger/BCMathTest.php
index 08d4b3fe..f97fac93 100644
--- a/tests/Math/BigInteger/BCMathTest.php
+++ b/tests/Math/BigInteger/BCMathTest.php
@@ -16,6 +16,6 @@ class Math_BigInteger_BCMathTest extends Math_BigInteger_TestCase
 
 		parent::setUpBeforeClass();
 
-		self::ensureModeConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_BCMATH);
+		self::ensureConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_BCMATH);
 	}
 }
diff --git a/tests/Math/BigInteger/GMPTest.php b/tests/Math/BigInteger/GMPTest.php
index fcd898d1..a0074db5 100644
--- a/tests/Math/BigInteger/GMPTest.php
+++ b/tests/Math/BigInteger/GMPTest.php
@@ -16,6 +16,6 @@ class Math_BigInteger_GMPTest extends Math_BigInteger_TestCase
 
 		parent::setUpBeforeClass();
 
-		self::ensureModeConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_GMP);
+		self::ensureConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_GMP);
 	}
 }
diff --git a/tests/Math/BigInteger/InternalOpenSSLTest.php b/tests/Math/BigInteger/InternalOpenSSLTest.php
new file mode 100644
index 00000000..f235484d
--- /dev/null
+++ b/tests/Math/BigInteger/InternalOpenSSLTest.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ * @author     Andreas Fischer <bantu@phpbb.com>
+ * @copyright  MMXIII Andreas Fischer
+ * @license    http://www.opensource.org/licenses/mit-license.html  MIT License
+ */
+
+class Math_BigInteger_InternalOpenSSLTest extends Math_BigInteger_TestCase
+{
+	static public function setUpBeforeClass()
+	{
+		if (!function_exists('openssl_public_encrypt'))
+		{
+			self::markTestSkipped('openssl_public_encrypt() function is not available.');
+		}
+
+		parent::setUpBeforeClass();
+
+		self::ensureConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_INTERNAL);
+	}
+}
diff --git a/tests/Math/BigInteger/InternalTest.php b/tests/Math/BigInteger/InternalTest.php
index 1ca2ef74..7cbbc8f8 100644
--- a/tests/Math/BigInteger/InternalTest.php
+++ b/tests/Math/BigInteger/InternalTest.php
@@ -11,6 +11,7 @@ class Math_BigInteger_InternalTest extends Math_BigInteger_TestCase
 	{
 		parent::setUpBeforeClass();
 
-		self::ensureModeConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_INTERNAL);
+		self::ensureConstant('MATH_BIGINTEGER_MODE', MATH_BIGINTEGER_MODE_INTERNAL);
+		self::ensureConstant('MATH_BIGINTEGER_OPENSSL_DISABLE', true);
 	}
 }
diff --git a/tests/PhpseclibTestCase.php b/tests/PhpseclibTestCase.php
index e69aa25a..22cdb95e 100644
--- a/tests/PhpseclibTestCase.php
+++ b/tests/PhpseclibTestCase.php
@@ -13,7 +13,7 @@ abstract class PhpseclibTestCase extends PHPUnit_Framework_TestCase
 	*
 	* @return null
 	*/
-	static protected function ensureModeConstant($constant, $expected)
+	static protected function ensureConstant($constant, $expected)
 	{
 		if (defined($constant))
 		{
@@ -26,7 +26,7 @@ abstract class PhpseclibTestCase extends PHPUnit_Framework_TestCase
 					if (!runkit_constant_redefine($constant, $expected))
 					{
 						self::markTestSkipped(sprintf(
-							"Failed to redefine mode constant %s to %s",
+							"Failed to redefine constant %s to %s",
 							$constant,
 							$expected
 						));
@@ -35,7 +35,7 @@ abstract class PhpseclibTestCase extends PHPUnit_Framework_TestCase
 				else
 				{
 					self::markTestSkipped(sprintf(
-						"Skipping test because mode constant %s is %s instead of %s",
+						"Skipping test because constant %s is %s instead of %s",
 						$constant,
 						$value,
 						$expected