diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3b4947fa3ded0d2471a60cf3cc0931811240574b..fc6927d29749f9e72b2607f5fa944603773d8b84 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,6 +23,7 @@ stages:
   - prepare
   - test
   - build
+  - test-build
   - release
 
 prepare:
@@ -107,6 +108,52 @@ docker:
   only:
     - master
 
+test-scheme:
+  stage: test-build
+  needs:
+    - job: build-openapi-3-scheme
+      artifacts: true
+  image:
+    name: schemathesis/schemathesis:stable
+    entrypoint: [""]
+  services:
+    - name: postgres:13
+      alias: postgres
+    - name: gitlab.servus.at:5050/aura/tank:master
+      entrypoint: ["/bin/bash"]
+      command:
+        - '-c'
+        - |
+          # make sure postgres is up before starting tank
+          while true; do 
+            timeout 0.25 cat >/dev/null 2>&1 </dev/tcp/postgres/5432
+            if [ "$?" = 124 ]; then break; fi
+          done
+          # disable authentication
+          sed '/auth:/q' /etc/aura/tank.yaml | head -n-1 >/tmp/tank.yaml
+          /usr/local/bin/tank --config /tmp/tank.yaml run --listen :"$TANK_PORT"
+      alias: tank
+  variables:
+    POSTGRES_DB: tank
+    POSTGRES_USER: tank
+    POSTGRES_PASSWORD: aura
+    TANK_DB_HOST: postgres
+    TANK_PORT: 8040
+    # Enable per-build-network so that service aliases are also
+    # usable in the service containers themselves.
+    FF_NETWORK_PER_BUILD: 1
+    # https://stackoverflow.com/questions/71228282/could-not-resolve-host-when-trying-to-access-service-in-gitlab
+    DOCKER_HOST: "tcp://docker:2375"
+    DOCKER_TLS_CERTDIR: ""
+  parallel:
+    matrix:
+      # see https://schemathesis.readthedocs.io/en/stable/cli.html#cmdoption-schemathesis-run-c
+      - CHECKS: status_code_conformance
+      - CHECKS: response_headers_conformance
+      - CHECKS: response_schema_conformance
+  script:
+    - schemathesis run -c "$CHECKS" -b http://tank:"$TANK_PORT" --hypothesis-suppress-health-check too_slow api/docs/openapi/openapi.yaml
+
 docker-hub-push:
   # Use the official docker image.
   image: docker:latest