diff --git a/ext/admin/test.php b/ext/admin/test.php
index 53350465..3a463d09 100644
--- a/ext/admin/test.php
+++ b/ext/admin/test.php
@@ -14,6 +14,8 @@ class AdminPageTest extends ShimmieWebTestCase {
 		$this->log_in_as_admin();
 		$this->get_page('admin');
 		$this->assert_title("Admin Tools");
+		$this->set_field("action", "purge unused tags");
+		$this->click("Go");
 		$this->log_out();
 
 		# FIXME: make sure the admin tools actually work