Can't communicate between docker containers in Gitlab-CI - docker

Question

In the second stage of my CI pipeline (after building a fresh docker image). I'm using other docker containers to test the new image, but I'm not able to get send any requests between these containers. My CI config is as follows:
stages:
- build
- test
services:
- docker:dind
variables:
# Enable network-per-build to allow gitlab services to see one another
FF_NETWORK_PER_BUILD: "true"
DOCKER_DRIVER: overlay2
DOCKER_HOST: tcp://docker:2376
DOCKER_TLS_CERTDIR: '/certs'
IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
# IMAGE SETTINGS
NODE_ENV: "development"
API_URL: "http://danielgtaylor-apisprout:8000"
PORT: 8080
build:
stage: build
image: docker
script:
- docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
- docker build -t ${CI_REGISTRY_IMAGE}:test .
- docker push ${CI_REGISTRY_IMAGE}:test
test:
stage: test
image: docker
services:
- docker:dind
- name: ${CI_REGISTRY_IMAGE}:test
alias: server
script:
- docker run --rm --name apisprout -d -v $CI_PROJECT_DIR/v2-spec.yml:/api.yaml danielgtaylor/apisprout /api.yaml
- docker run --rm --name newman -v $CI_PROJECT_DIR:/etc/newman postman/newman run 'Micros V2.postman_collection.json'
And receive the following error ENOTFOUND server server:8080
I have also tried with a new bridge network:
test:
stage: test
image: docker
services:
- docker:dind
script:
- docker network create -d bridge mynet
- docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
- docker run -d --network=mynet --hostname=server ${CI_REGISTRY_IMAGE}:test
- docker run --rm --network=mynet --hostname=apisprout --name apisprout -d -v $CI_PROJECT_DIR/v2-spec.yml:/api.yaml danielgtaylor/apisprout /api.yaml
- docker run --rm --network=mynet --name newman -v $CI_PROJECT_DIR:/etc/newman postman/newman run 'Micros V2.postman_collection.json'
But I receive the same error ENOTFOUND server server:8080.
I am unable to run the docker run containers as services as I don't believe attaching volumes is supported yet.
I'm also running this on Gitlab.com, not a private runner.