diff --git a/.github/docker/docker_config.json b/.github/docker/docker_config.json
deleted file mode 100644
index 28b7230b..00000000
--- a/.github/docker/docker_config.json
+++ /dev/null
@@ -1,26 +0,0 @@
-{
-    "debug": true,
-    "database_backend": "mongodb",
-    "mongo_uri": "mongodb://db:27017",
-    "mongo_database": "docker_optimade_gateway",
-    "page_limit": 20,
-    "page_limit_max": 500,
-    "base_url": "http://gh_actions_host:5000",
-    "implementation": {
-        "name": "OPTIMADE Gateway",
-        "version": "0.1.2",
-        "source_url": "https://github.com/Materials-Consortia/optimade-gateway",
-        "maintainer": {"email": "casper.andersen@epfl.ch"}
-    },
-    "provider": {
-        "name": "OPTIMADE Gateway",
-        "description": "A gateway server to query multiple OPTIMADE databases.",
-        "prefix": "gateway",
-        "homepage": "https://github.com/Materials-Consortia/optimade-gateway"
-    },
-    "provider_fields": {},
-    "aliases": {},
-    "length_aliases": {},
-    "log_level": "debug",
-    "load_optimade_providers_databases": false
-}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0fc1f01c..23b71641 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -102,30 +102,16 @@ jobs:
       with:
         fetch-depth: 2
 
-    - name: Setup and run OPTIMADE Python tools server
-      run: |
-        git clone --recurse-submodules https://github.com/Materials-Consortia/optimade-python-tools
-        docker-compose -f ./optimade-python-tools/docker-compose.yml up optimade &
-        .github/utils/wait_for_it.sh localhost:3213 -t 120
-
     - name: Build the Docker app
-      run: docker-compose build --build-arg CONFIG_FILE=".github/docker/docker_config.json"
+      run: docker-compose build
+      env:
+        OPTIMADE_BASE_URL: "http://gh_actions_host:5000"
 
-    - name: Start the Docker app (adding OPT server to 'gateway' network)
+    - name: Start the Docker app
       run: |
         docker-compose up &
         .github/utils/wait_for_it.sh localhost:5000 -t 120
-        sleep 5
-        docker network connect --alias optimade-sample-server optimade-gateway_gateway optimade-python-tools_optimade_1
-
-    - name: OPTIMADE Validator for gateway
-      uses: Materials-Consortia/optimade-validator-action@v2
-      with:
-        port: 5000
-        path: /gateways/docker_ci
-        all versioned paths: True
-        validate unversioned path: True
-        verbosity: 2
+        sleep 30
 
   docs:
     name: Documentation