diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index eb6dd93..88df893 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -1,4 +1,9 @@
 <?php
+chdir(__DIR__ . '/..');
+if (!file_exists('vendor/autoload.php')) {
+    `composer dump-autoload`;
+}
+
 require './vendor/autoload.php';
 
 if (!class_exists('PHPUnit\Framework\TestCase')) {