Remove a few empty 'mock' classes
diff --git a/tests/codeigniter/libraries/Useragent_test.php b/tests/codeigniter/libraries/Useragent_test.php
index aed38b8..c02f2bd 100644
--- a/tests/codeigniter/libraries/Useragent_test.php
+++ b/tests/codeigniter/libraries/Useragent_test.php
@@ -11,7 +11,7 @@
$_SERVER['HTTP_USER_AGENT'] = $this->_user_agent;
$this->ci_vfs_clone('application/config/user_agents.php');
- $this->agent = new Mock_Libraries_UserAgent();
+ $this->agent = new CI_User_agent();
$this->ci_instance_var('agent', $this->agent);
}