diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index a85e52d..9de4588 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -39,6 +39,6 @@ function get_json_config()
 $path = QTEST_DIR.QDS.'db_files'.QDS.'test_sqlite.db';
 @unlink($path);
 
-require_once __DIR__ . 'TestCase.php';
+require_once __DIR__ . '/TestCase.php';
 
 // End of bootstrap.php