A Behat definition that will instruct the client to press a vertical tab, useful for forms leveraging Field Group in Drupal (Shiny admin theme).
/**
* @When I press the :vertical_tab vertical tab
* @param $vertical_tab
*/
public function iPressTheVerticalTab($vertical_tab) {
$this->getSession()->getDriver()->click('//*[contains(@class, "node-form")]/div/div[contains(@class, "vertical-tabs")]/ul/*/a/strong[text()="' . $vertical_tab . '"]');
}