diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index a36607d8..c9e365a1 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -7,6 +7,8 @@
 
 namespace DVDoug\BoxPacker;
 
+require_once __DIR__.'/../vendor/autoload.php';
+
 class TestBox implements Box
 {