diff --git a/tests/codeigniter/core/Loader_test.php b/tests/codeigniter/core/Loader_test.php
index e75d0d5..ac2656e 100644
--- a/tests/codeigniter/core/Loader_test.php
+++ b/tests/codeigniter/core/Loader_test.php
@@ -147,6 +147,9 @@
 
 	public function test_driver()
 	{
+		// Call the autoloader, to include system/libraries/Driver.php
+		class_exists('CI_Driver_Library', TRUE);
+
 		// Create driver in VFS
 		$driver = 'unit_test_driver';
 		$dir = ucfirst($driver);