diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index 63a3b55..eeceeaf 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -384,32 +384,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      # In DinD (Gitea runners), the workspace is a Docker volume, not a
-      # host path.  Resolve the volume backing $PWD so the test-runner
-      # container can mount the same checkout.
-      - name: Resolve workspace volume
-        id: ws
-        run: |
-          # The CI runner's own container has the workspace mounted.
-          # Find which Docker volume backs the current working directory.
-          SELF=$(cat /proc/1/cpuset 2>/dev/null | sed 's|.*/||' || hostname)
-          VOL=$(docker inspect "$SELF" 2>/dev/null \
-            | grep -oP '"Source":\s*"\K[^"]+' \
-            | head -1) || true
-          if [ -z "$VOL" ]; then
-            # Fallback: current directory (works for non-DinD environments)
-            VOL="."
-          fi
-          echo "CI_WORKSPACE_VOLUME=${VOL}" >> "$GITHUB_OUTPUT"
-          echo "Workspace volume → ${VOL}"
-
       - name: Run surface tests (compose)
         env:
           BUNDLED_PACKAGES: '*'
           ARMATURE_ADMIN_USERNAME: admin
           ARMATURE_ADMIN_PASSWORD: admin
           ARMATURE_ADMIN_EMAIL: admin@test.local
-          CI_WORKSPACE_VOLUME: ${{ steps.ws.outputs.CI_WORKSPACE_VOLUME }}
         run: |
           docker compose -f docker-compose.yml -f docker-compose.ci.yml up --build \
             --abort-on-container-exit \
diff --git a/docker-compose.ci.yml b/docker-compose.ci.yml
index 5f1ea0d..e315928 100644
--- a/docker-compose.ci.yml
+++ b/docker-compose.ci.yml
@@ -25,20 +25,20 @@ services:
       start_period: 5s
 
   test-runner:
-    image: mcr.microsoft.com/playwright:v1.52.0-noble
+    build:
+      context: .
+      dockerfile_inline: |
+        FROM mcr.microsoft.com/playwright:v1.52.0-noble
+        RUN npm install --no-save playwright 2>/dev/null
+        WORKDIR /work
+        COPY ci/ /work/ci/
+        RUN chmod +x /work/ci/*.sh
     depends_on:
       armature:
         condition: service_healthy
     working_dir: /work
-    volumes:
-      - ${CI_WORKSPACE_VOLUME:-.}:/work
     environment:
       SERVER_URL: http://armature:80
       ADMIN_USER: admin
       ADMIN_PASS: admin
-    command:
-      - bash
-      - -c
-      - |
-        npm install --no-save playwright 2>/dev/null
-        ./ci/run-surface-tests.sh
+    command: ["bash", "-c", "./ci/run-surface-tests.sh"]