<?php
/*
	Plugin Name: TGI Tests
	Plugin URI: http://wordpress.org
	Description: Testing
	Author: Marventus
	Version: 1.0
*/

function tgitest_in_category() {
	if( in_category('reviews') )
		echo "This is a test for admins only. Please disregard.";
}
add_action("wp_head", "tgitest_in_category");