diff --git a/tests/test_framework/phpbb_database_test_case.php b/tests/test_framework/phpbb_database_test_case.php
index 81c4a4f94e..9752ec2fe6 100644
--- a/tests/test_framework/phpbb_database_test_case.php
+++ b/tests/test_framework/phpbb_database_test_case.php
@@ -13,6 +13,21 @@ abstract class phpbb_database_test_case extends PHPUnit_Extensions_Database_Test
 
 	protected $test_case_helpers;
 
+	public function __construct($name = NULL, array $data = array(), $dataName = '')
+	{
+		parent::__construct($name, $data, $dataName);
+		$this->backupStaticAttributesBlacklist += array(
+			'PHP_CodeCoverage' => array('instance'),
+			'PHP_CodeCoverage_Filter' => array('instance'),
+			'PHP_CodeCoverage_Util' => array('ignoredLines', 'templateMethods'),
+			'PHP_Timer' => array('startTimes',),
+			'PHP_Token_Stream' => array('customTokens'),
+			'PHP_Token_Stream_CachingFactory' => array('cache'),
+
+			'phpbb_database_test_case' => array('already_connected'),
+		);
+	}
+
 	public function get_test_case_helpers()
 	{
 		if (!$this->test_case_helpers)
diff --git a/tests/test_framework/phpbb_test_case.php b/tests/test_framework/phpbb_test_case.php
index fe90d321dc..f189da3671 100644
--- a/tests/test_framework/phpbb_test_case.php
+++ b/tests/test_framework/phpbb_test_case.php
@@ -11,6 +11,21 @@ class phpbb_test_case extends PHPUnit_Framework_TestCase
 {
 	protected $test_case_helpers;
 
+	public function __construct($name = NULL, array $data = array(), $dataName = '')
+	{
+		parent::__construct($name, $data, $dataName);
+		$this->backupStaticAttributesBlacklist += array(
+			'PHP_CodeCoverage' => array('instance'),
+			'PHP_CodeCoverage_Filter' => array('instance'),
+			'PHP_CodeCoverage_Util' => array('ignoredLines', 'templateMethods'),
+			'PHP_Timer' => array('startTimes',),
+			'PHP_Token_Stream' => array('customTokens'),
+			'PHP_Token_Stream_CachingFactory' => array('cache'),
+
+			'phpbb_database_test_case' => array('already_connected'),
+		);
+	}
+
 	public function get_test_case_helpers()
 	{
 		if (!$this->test_case_helpers)