Maximum execution time exceeded detected in worms.php

I have tried to run theme checker against my child theme which is using wordpress TwentyTen theme as its parent.

I’m getting a blank screen, and the following error stack

[28-Apr-2016 10:24:48 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/wordpress/wp-content/plugins/theme-check/checks/worms.php on line 19
[28-Apr-2016 10:24:48 UTC] PHP Stack trace:
[28-Apr-2016 10:24:48 UTC] PHP 1. {main}() /var/www/wordpress/wp-admin/themes.php:0
[28-Apr-2016 10:24:48 UTC] PHP 2. require_once() /var/www/wordpress/wp-admin/themes.php:10
[28-Apr-2016 10:24:48 UTC] PHP 3. do_action() /var/www/wordpress/wp-admin/admin.php:236
[28-Apr-2016 10:24:48 UTC] PHP 4. call_user_func_array:{/var/www/wordpress/wp-includes/plugin.php:525}() /var/www/wordpress/wp-includes/plugin.php:525
[28-Apr-2016 10:24:48 UTC] PHP 5. ThemeCheckMain->themecheck_do_page() /var/www/wordpress/wp-includes/plugin.php:525
[28-Apr-2016 10:24:48 UTC] PHP 6. check_main() /var/www/wordpress/wp-content/plugins/theme-check/theme-check.php:64
[28-Apr-2016 10:24:48 UTC] PHP 7. run_themechecks() /var/www/wordpress/wp-content/plugins/theme-check/main.php:34
[28-Apr-2016 10:24:48 UTC] PHP 8. WormCheck->check() /var/www/wordpress/wp-content/plugins/theme-check/checkbase.php:33
[28-Apr-2016 10:24:48 UTC] PHP 9. preg_match() /var/www/wordpress/wp-content/plugins/theme-check/checks/worms.php:19

Suggestions on the probably cause welcome as I’ve no idea where to start.

https://ww.wp.xz.cn/plugins/theme-check/