Jenkins parallelized dockers

stage('Run tests in parallel') {
    parallel {
        stage('SE Tests 1 / 5') {
            agent {
                docker {
                    registryCredentialsId 'REGISTRY_CREDENTIALS'
                    image env.DOCKER_IMAGE_NAME
                    registryUrl 'https://private_registry'
                    args "-u root:root -m 4300m --cpus='1.5'"
                }
            }
            steps {
                runTests()
            }
        }
    }
}