diff --git a/test/carddav.php b/test/carddav.php
new file mode 100644
index 000000000..e010f2584
--- /dev/null
+++ b/test/carddav.php
@@ -0,0 +1,54 @@
+<?php
+define('APP_VERSION', '1.0');
+$dir = dirname(__DIR__);
+require $dir . '/snappymail/v/0.0.0/app/libraries/snappymail/dav/client.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/snappymail/http/exception.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/snappymail/http/response.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/snappymail/http/request.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/snappymail/http/request/curl.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/snappymail/http/request/socket.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/RainLoop/Common/PdoAbstract.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/RainLoop/Providers/AddressBook/CardDAV.php';
+require $dir . '/snappymail/v/0.0.0/app/libraries/MailSo/Base/DateTimeHelper.php';
+
+use \SnappyMail\DAV\Client as DAVClient;
+
+class Logger
+{
+	public function AddSecret()
+	{
+	}
+	public function __call(string $name, array $arguments)
+	{
+		echo "Logger->{$name}('".\implode("', '", $arguments)."');\n";
+	}
+}
+
+class PdoAddressBook
+{
+	use \RainLoop\Providers\AddressBook\CardDAV;
+
+	public function Sync(string $sEmail, string $sUrl, string $sUser, string $sPassword, string $sProxy = '') : bool
+	{
+		$oClient = $this->getDavClient($sUrl, $sUser, $sPassword, $sProxy);
+		if ($oClient) {
+			$aRemoteSyncData = $this->prepareDavSyncData($oClient, $oClient->__UrlPath__);
+			print_r($aRemoteSyncData);
+		}
+		return true;
+	}
+}
+
+$PdoAddressBook = new PdoAddressBook();
+
+require $dir . '/snappymail/v/0.0.0/app/libraries/MailSo/Log/Enumerations/Type.php';
+$PdoAddressBook->oLogger = new Logger();
+
+if (false) {
+	// https://try.nextcloud.com/
+	$PdoAddressBook->Sync('dummy@example.com',
+		'https://demo2.nextcloud.com/remote.php/dav/addressbooks/users/bEWFmaWz73ZwCpPQ/contacts/',
+		'bEWFmaWz73ZwCpPQ',
+		'demo'
+	);
+}