diff --git a/lib/Doctrine/DBAL/Schema/MsSqlSchemaManager.php b/lib/Doctrine/DBAL/Schema/MsSqlSchemaManager.php
index 8a78f57c3..2ec9d32cb 100644
--- a/lib/Doctrine/DBAL/Schema/MsSqlSchemaManager.php
+++ b/lib/Doctrine/DBAL/Schema/MsSqlSchemaManager.php
@@ -391,4 +391,9 @@ class MsSqlSchemaManager extends AbstractSchemaManager
 
         return $this->conn->fetchColumn($query);
     }
+
+    protected function _getPortableTableColumnDefinition($tableColumn)
+    {
+        return $column;
+    }
 }
\ No newline at end of file
diff --git a/tests/Doctrine/Tests/TestInit.php b/tests/Doctrine/Tests/TestInit.php
index 5be820739..fe38a53b9 100644
--- a/tests/Doctrine/Tests/TestInit.php
+++ b/tests/Doctrine/Tests/TestInit.php
@@ -13,6 +13,9 @@ require_once __DIR__ . '/../../../lib/Doctrine/Common/ClassLoader.php';
 $classLoader = new \Doctrine\Common\ClassLoader('Doctrine');
 $classLoader->register();
 
+require_once 'PHPUnit/Util/Filter.php';
+\PHPUnit_Util_Filter::addDirectoryToWhitelist(__DIR__ . '/../../../lib/');
+
 set_include_path(
     __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . 'lib'
     . PATH_SEPARATOR .