diff --git a/phpunit.xml b/phpunit.xml
index a071d34..a38403e 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,4 +1,4 @@
-<phpunit>
+<phpunit bootstrap="tests/bootstrap.php">
   <testsuites>
     <testsuite name="Serialization">
       <file>tests/suite.php</file>
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..744fe6b
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,2 @@
+<?php
+require dirname(__FILE__) . '/../vendor/autoload.php';
\ No newline at end of file