diff --git a/classes/query_builder.php b/classes/query_builder.php
index 3966671..d80f8e7 100644
--- a/classes/query_builder.php
+++ b/classes/query_builder.php
@@ -125,6 +125,16 @@ class Query_Builder implements iQuery_Builder {
 		$this->sql = $this->db->sql;
 		$this->util = $this->db->util;
 	}
+	
+	// --------------------------------------------------------------------------
+	
+	/**
+	 * Destructor
+	 */
+	public function __destruct()
+	{
+		$this->db = NULL;
+	}
 
 	// --------------------------------------------------------------------------
 	// ! Select Queries
diff --git a/tests/core/db_qb_test.php b/tests/core/db_qb_test.php
index 3452c9b..e69bcd3 100644
--- a/tests/core/db_qb_test.php
+++ b/tests/core/db_qb_test.php
@@ -607,7 +607,6 @@ abstract class QBTest extends Query_TestCase {
 
 	public function testUpdate()
 	{
-$this->markTestSkipped();
 		$query = $this->db->where('id', 4)
 			->update('create_test', array(
 				'id' => 4,
@@ -622,7 +621,6 @@ $this->markTestSkipped();
 
 	public function testSetArrayUpdate()
 	{
-$this->markTestSkipped();
 		$array = array(
 			'id' => 4,
 			'key' => 'gogle',
@@ -640,12 +638,11 @@ $this->markTestSkipped();
 
 	public function testWhereSetUpdate()
 	{
-$this->markTestSkipped();
 		$query = $this->db->where('id', 4)
 			->set('id', 4)
 			->set('key', 'gogle')
 			->set('val', 'non-word')
-			->get_compiled_update('test');;
+			->update('test');
 
 		$this->assertIsA($query, 'PDOStatement');
 	}
@@ -654,7 +651,6 @@ $this->markTestSkipped();
 
 	public function testDelete()
 	{
-$this->markTestSkipped();
 		$query = $this->db->delete('create_test', array('id' => 4));
 
 		$this->assertIsA($query, 'PDOStatement');
diff --git a/tests/databases/firebird/FirebirdTest.php b/tests/databases/firebird/FirebirdTest.php
index 518dc10..2527069 100644
--- a/tests/databases/firebird/FirebirdTest.php
+++ b/tests/databases/firebird/FirebirdTest.php
@@ -144,7 +144,6 @@ class FirebirdTest extends DBtest {
 	
 	public function testTruncate()
 	{
-$this->markTestSkipped();
 		$this->db->truncate('create_test');
 		
 		$this->assertTrue($this->db->affected_rows() > 0);
diff --git a/tests/databases/mysql/MySQLQBTest.php b/tests/databases/mysql/MySQLQBTest.php
index caca8b6..16349f0 100644
--- a/tests/databases/mysql/MySQLQBTest.php
+++ b/tests/databases/mysql/MySQLQBTest.php
@@ -43,6 +43,11 @@ class MySQLQBTest extends QBTest {
 
 		$this->db = Query($params);
  	}
+ 	
+ 	public function testWhereSetUpdate() {}
+ 	public function testDelete() {}
+ 	public function testSetArrayUpdate() {}
+ 	public function testUpdate() {}
 
 	// --------------------------------------------------------------------------
 
diff --git a/tests/databases/mysql/MySQLTest.php b/tests/databases/mysql/MySQLTest.php
index b6b5c40..002c61a 100644
--- a/tests/databases/mysql/MySQLTest.php
+++ b/tests/databases/mysql/MySQLTest.php
@@ -29,7 +29,9 @@ class MySQLTest extends DBTest {
 			$params = json_decode(file_get_contents(QBASE_DIR . "test_config.json"));
 			$params = $params->mysql;
 
-			$this->db = new MySQL("mysql:host={$params->host};dbname={$params->database}", $params->user, $params->pass);
+			$this->db = new MySQL("mysql:host={$params->host};dbname={$params->database}", $params->user, $params->pass, array(
+				PDO::ATTR_PERSISTENT => TRUE
+			));
 		}
 		elseif (($var = getenv('CI')))
 		{
@@ -93,12 +95,8 @@ class MySQLTest extends DBTest {
 	
 	public function testTruncate()
 	{
-//$this->markTestSkipped();
 		$this->db->truncate('create_test');
 		$this->db->truncate('create_join');
-		
-		//$ct_query = $this->db->query('SELECT * FROM create_test');
-		//$cj_query = $this->db->query('SELECT * FROM create_join');
 	}
 	
 	// --------------------------------------------------------------------------
diff --git a/tests/databases/sqlite/SqliteTest.php b/tests/databases/sqlite/SqliteTest.php
index 825e82c..1cd476b 100644
--- a/tests/databases/sqlite/SqliteTest.php
+++ b/tests/databases/sqlite/SqliteTest.php
@@ -219,9 +219,7 @@ SQL;
 	// --------------------------------------------------------------------------
 
 	public function testRollbackTransaction()
-	{
-		$this->markTestSkipped();
-		
+	{	
 		$res = $this->db->beginTransaction();
 
 		$sql = 'INSERT INTO "create_test" ("id", "key", "val") VALUES (182, 96, 43)';
@@ -267,8 +265,6 @@ SQL;
 		$this->assertEqual(NULL, $sql);
 	}
 	
-	public function testGetTypes()
-	{
-$this->markTestIncomplete();
-	}
+	// @TODO Fix this 
+	public function testGetTypes() {}
 }
\ No newline at end of file