$formheader = get_string('rununittests', $langfile);
}
// Print the form for adjusting options.
-print_simple_box_start('center', '70%');
+print_box_start('generalbox boxwidthwide');
echo '<form method="get" action="index.php">';
echo '<fieldset class="invisiblefieldset">';
print_heading($formheader);
echo '<input type="submit" value="' . get_string('runtests', $langfile) . '" />';
echo '</fieldset>';
echo '</form>';
-print_simple_box_end();
+print_box_end();
// Footer.
admin_externalpage_print_footer();