diff --git a/ext/phar/tests/tar/phar_setsignaturealgo2.phpt b/ext/phar/tests/tar/phar_setsignaturealgo2.phpt
index 422ca90e8af..c16e7523f88 100644
--- a/ext/phar/tests/tar/phar_setsignaturealgo2.phpt
+++ b/ext/phar/tests/tar/phar_setsignaturealgo2.phpt
@@ -32,9 +32,11 @@ var_dump($p->getSignature());
 echo $e->getMessage();
 }
 try {
+$config = dirname(__FILE__) . '/../files/openssl.cnf';
+$config_arg = array('config' => $config);
 $private = openssl_get_privatekey(file_get_contents(dirname(dirname(__FILE__)) . '/files/private.pem'));
 $pkey = '';
-openssl_pkey_export($private, $pkey);
+openssl_pkey_export($private, $pkey, NULL, $config_arg);
 $p->setSignatureAlgorithm(Phar::OPENSSL, $pkey);
 var_dump($p->getSignature());
 } catch (Exception $e) {