Pantheon Build Tools with Lando Behat Testing

.lando.yml

name: some-site
recipe: pantheon
config:
  framework: drupal8
  env: dev
  site: some-site
  id: some-uuid-string-here
  drush: 8.3
  php: '7.3'
  webroot: web
  xdebug: true

services:
  appserver:
    overrides:
      environment:
        BEHAT_PARAMS: >-
          {"extensions" : {"Behat\\MinkExtension" : {"base_url" :
          "http://appserver_nginx/"}, "Drupal\\DrupalExtension" : {"drush" :   {
          "root":  "/app/web" }}}}
  qa:
    type: compose
    services:
      image: quay.io/pantheon-public/build-tools-ci:6.x
      user: root
      ports:
        - '9222'
      command: "google-chrome --disable-gpu --headless --remote-debugging-address=0.0.0.0 --remote-debugging-port=9222 --no-sandbox </dev/null &>/dev/null &"
      environment:
        DEV_SITE_URL: https://dev-site-name.pantheonsite.io
        MULTIDEV_SITE_URL: https://appserver_nginx
        NODE_EXTRA_CA_CERTS: /user/.lando/certs/lndo.site.pem
tooling:
  backstop:
    service: qa
    cmd:
      - "backstop reference --config=.ci/test/visual-regression/backstopConfig.js"
      - "backstop test --config=/app/.ci/test/visual-regression/backstopConfig.js"
  behat:
    service: qa
    cmd: "/app/vendor/bin/behat -c /app/tests/behat/behat-lando.yml"

behat-lando.yml

#
# behat.yml file for testing locally with lando.
#
default:
  suites:
    default:
      paths:
        - %paths.base%/features
        - %paths.base%/site-features
      contexts:
        - FeatureContext
        - Drupal\DrupalExtension\Context\DrupalContext
        - Drupal\DrupalExtension\Context\MinkContext
        - Drupal\DrupalExtension\Context\MessageContext
        - Drupal\DrupalExtension\Context\DrushContext
        - FailAid\Context\FailureContext
  extensions:
    Behat\MinkExtension:
      files_path: './data-files'
      # base_url set by ENV
      browser_name: chrome
      sessions:
        default:
          chrome:
            api_url: "http://qa:9222"
            validate_certificate: false

    Drupal\DrupalExtension:
      blackbox: ~
      api_driver: 'drush'
      drush:
        root: '/app/web'

    DMore\ChromeExtension\Behat\ServiceContainer\ChromeExtension: ~

Should I be setting a base_url here - it states #base_url set by ENV - this is unclear to me.

I'm using this precise configuration but am getting this error:

Could not fetch version information from http://192.168.16.8:9222/json/version. Check if Chrome is running. See docs/troubleshooting.md if Chrome crashed unexpectedly.