Curl GuzzleHttp connection failed

Hello i have a problem with running behaviour test using GuzzleHttp. I’m new with circle and i’m not sure if i do something bad. On my localhost it works perfect but here it doesn’t. Here is error message:

When I send a "GET" request to "api/en/servicecategories/main"               # AppBundle\Features\Context\RestApi::iSendARequestTo()
      cURL error 7: Failed to connect to 127.0.0.1 port 80: Connection refused (see http://curl.haxx.se/libcurl/c/libcurl-errors.html) (GuzzleHttp\Exception\ConnectException)

here is the whole screen: Curl error

and here is my circle.yml:

machine:
  timezone:
    Europe/Prague
  php:
    version: 7.0.4

dependencies:
  cache_directories:
    - vendor
  pre:
    - cp $HOME/$CIRCLE_PROJECT_REPONAME/app/config/parameters.yml.circle.dist $HOME/$CIRCLE_PROJECT_REPONAME/app/config/parameters.yml

database:
  override:
    - php app/console doctrine:migrations:migrate --no-interaction
    - php app/console doctrine:fixtures:load --append

test:
  override:
    - php bin/behat