behat.yml

default:
  autoload:
    - '%paths.base%/tests/features/bootstrap'
  suites:
    default:
      filters:
        tags: "~@skip"
      failure_path: '%paths.base%/tests/failures'
      paths:
        features: '%paths.base%/tests/features'
      contexts:
        - FailureContext
        - FeatureContext
        # Support BigPipe in Behat - https://github.com/jhedstrom/drupalextension/pull/325
        # Modified to not require Drupal driver.
        - BigPipeContext
        - Drupal\DrupalExtension\Context\DrupalContext
        - Drupal\DrupalExtension\Context\MinkContext
        - Drupal\DrupalExtension\Context\MessageContext
        - Drupal\DrupalExtension\Context\DrushContext

BigPipeContext.php

<?php

use Drupal\DrupalExtension\Context\RawDrupalContext;
use Behat\Mink\Exception\UnsupportedDriverActionException;

/**
 * Big Pipe context.
 */
class BigPipeContext extends RawDrupalContext {

  /**
   * Prepares Big Pipe NOJS cookie if needed.
   *
   * TODO: breaking change, this executes before wdSession connected.
   * // @BeforeScenario
   */
  public function prepareBigPipeNoJsCookie() {
    try {
      // Check if JavaScript can be executed by Driver.
      $this->getSession()->getDriver()->executeScript('true');
    } catch (UnsupportedDriverActionException $e) {
      // Set NOJS cookie.
      $this->getSession()->setCookie('big_pipe_nojs', TRUE);

    } catch (\Exception $e) {
      // Mute exceptions.
    }
  }

}