diff --git a/apps/files_external/tests/backends/smb.php b/apps/files_external/tests/backends/smb.php
index b66459c42adda8bf7ab67878b00a9fb48dea4d4e..4b1150c6a258d5c39bcea4aac57c6840513a9b64 100644
--- a/apps/files_external/tests/backends/smb.php
+++ b/apps/files_external/tests/backends/smb.php
@@ -10,8 +10,6 @@ namespace Test\Files\Storage;
 
 class SMB extends Storage {
 
-	private $config;
-
 	protected function setUp() {
 		parent::setUp();
 
@@ -20,6 +18,9 @@ class SMB extends Storage {
 		if (!is_array($config) or !$config['run']) {
 			$this->markTestSkipped('Samba backend not configured');
 		}
+		if (substr($config['root'], -1, 1) != '/') {
+			$config['root'] .= '/';
+		}
 		$config['root'] .= $id; //make sure we have an new empty folder to work in
 		$this->instance = new \OC\Files\Storage\SMB($config);
 		$this->instance->mkdir('/');
diff --git a/apps/files_external/tests/backends/webdav.php b/apps/files_external/tests/backends/webdav.php
index c390612810d0bafbe1bad9125b0588622c0215c1..c454c8e4a9dabd76df31158b5a6d94dadc2e693b 100644
--- a/apps/files_external/tests/backends/webdav.php
+++ b/apps/files_external/tests/backends/webdav.php
@@ -10,8 +10,6 @@ namespace Test\Files\Storage;
 
 class DAV extends Storage {
 
-	private $config;
-
 	protected function setUp() {
 		parent::setUp();