diff --git a/apps/files_encryption/tests/util.php b/apps/files_encryption/tests/util.php
index cb10befc8e..368b7b3dc3 100755
--- a/apps/files_encryption/tests/util.php
+++ b/apps/files_encryption/tests/util.php
@@ -219,7 +219,7 @@ class Test_Encryption_Util extends \PHPUnit_Framework_TestCase {
 
 		\OC_User::setUserId(\Test_Encryption_Util::TEST_ENCRYPTION_UTIL_USER1);
 
-		$filename = 'tmp-' . time() . '.test';
+		$filename = '/tmp-' . time() . '.test';
 
 		// Disable encryption proxy to prevent recursive calls
 		$proxyStatus = \OC_FileProxy::$enabled;