diff --git a/apps/files_external/tests/command/listcommandtest.php b/apps/files_external/tests/command/listcommandtest.php
new file mode 100644
index 0000000000..338ddb7593
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+++ b/apps/files_external/tests/command/listcommandtest.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Files_External\Tests\Command;
+
+use OCA\Files_External\Command\ListCommand;
+use OCA\Files_External\Lib\Auth\NullMechanism;
+use OCA\Files_External\Lib\Auth\Password\Password;
+use OCA\Files_External\Lib\Auth\Password\UserProvided;
+use OCA\Files_External\Lib\Backend\Local;
+use OCA\Files_external\Lib\StorageConfig;
+use Symfony\Component\Console\Output\BufferedOutput;
+
+class ListCommandTest extends CommandTest {
+	/**
+	 * @return \OCA\Files_External\Command\ListCommand|\PHPUnit_Framework_MockObject_MockObject
+	 */
+	private function getInstance() {
+		/** @var \OCA\Files_external\Service\GlobalStoragesService|\PHPUnit_Framework_MockObject_MockObject $globalService */
+		$globalService = $this->getMock('\OCA\Files_external\Service\GlobalStoragesService', null, [], '', false);
+		/** @var \OCA\Files_external\Service\UserStoragesService|\PHPUnit_Framework_MockObject_MockObject $userService */
+		$userService = $this->getMock('\OCA\Files_external\Service\UserStoragesService', null, [], '', false);
+		/** @var \OCP\IUserManager|\PHPUnit_Framework_MockObject_MockObject $userManager */
+		$userManager = $this->getMock('\OCP\IUserManager');
+		/** @var \OCP\IUserSession|\PHPUnit_Framework_MockObject_MockObject $userSession */
+		$userSession = $this->getMock('\OCP\IUserSession');
+
+		return new ListCommand($globalService, $userService, $userSession, $userManager);
+	}
+
+	public function testListAuthIdentifier() {
+		$l10n = $this->getMock('\OC_L10N', null, [], '', false);
+		$credentialsManager = $this->getMock('\OCP\Security\ICredentialsManager');
+		$instance = $this->getInstance();
+		$mount1 = new StorageConfig();
+		$mount1->setAuthMechanism(new Password($l10n));
+		$mount1->setBackend(new Local($l10n, new NullMechanism($l10n)));
+		$mount2 = new StorageConfig();
+		$mount2->setAuthMechanism(new UserProvided($l10n, $credentialsManager));
+		$mount2->setBackend(new Local($l10n, new NullMechanism($l10n)));
+		$input = $this->getInput($instance, [], [
+			'output' => 'json'
+		]);
+		$output = new BufferedOutput();
+
+		$instance->listMounts('', [$mount1, $mount2], $input, $output);
+		$output = json_decode($output->fetch(), true);
+
+		$this->assertNotEquals($output[0]['authentication_type'], $output[1]['authentication_type']);
+	}
+}