{
    "name": "client/project",
    "description": "{Project} drupal codebase for {client}.",
    "require-dev": {
        "behat/mink-zombie-driver": "~1.2",
        "drupal/drupal-extension": "~3.0",
        "drush/drush": "^8",
        "phpmd/phpmd": "~2.1",
        "drupal/coder": "^8.2",
        "guzzlehttp/guzzle" : "^6.0@dev",
        "symfony/dependency-injection": "2.7.*",
        "symfony/event-dispatcher": "2.7.*"
    },
    "require": {
        "roave/security-advisories": "dev-master"
    }
}

{
    "name": "client/project",
    "description": "{Project} drupal codebase for {client}.",
    "require-dev": {
        "behat/mink": "~1.7",
        "behat/mink-zombie-driver": "~1.2",
        "behat/mink-goutte-driver": "~1.2",
        "drupal/drupal-extension": "~3.0",
        "jcalderonzumba/gastonjs": "~1.0.2",
        "jcalderonzumba/mink-phantomjs-driver": "~0.3.1",
        "mikey179/vfsStream": "~1.2",
        "phpunit/phpunit": "~4.8",
        "drush/drush": "^8",
        "phpmd/phpmd": "~2.1",
        "drupal/coder": "^8.2",
        "guzzlehttp/guzzle" : "^6.0@dev",
        "symfony/dependency-injection": "2.7.*",
        "symfony/event-dispatcher": "2.7.*"
    },
    "require": {
        "roave/security-advisories": "dev-master"
    }
}

Add the other dependencies from Drupal core require-dev
Add the other dependencies from Drupal core require-dev
