diff --git a/lib/simpletest/portfolio_testclass.php b/lib/simpletest/portfolio_testclass.php
index 22c6aedcdfb..8e1cddc94b6 100644
--- a/lib/simpletest/portfolio_testclass.php
+++ b/lib/simpletest/portfolio_testclass.php
@@ -37,6 +37,7 @@ if (!defined('MOODLE_INTERNAL')) {
 
 require_once("$CFG->libdir/portfoliolib.php");
 require_once("$CFG->libdir/portfolio/exporter.php");
+require_once("$CFG->libdir/portfolio/plugin.php");
 require_once("$CFG->dirroot/$CFG->admin/generator.php");
 
 class portfolio_plugin_test extends portfolio_plugin_push_base {