diff --git a/.gitea/workflows/cd.yaml b/.gitea/workflows/cd.yaml
index 2ddc5d60..189b442d 100644
--- a/.gitea/workflows/cd.yaml
+++ b/.gitea/workflows/cd.yaml
@@ -124,31 +124,15 @@ jobs:
           exit $PYTEST_EXIT
 
       # ── 整合測試 B5 (2026-04-10) ──────────────────────────────────────────
-      # 起臨時 pgvector PostgreSQL → 建 schema → 跑 test_b5_core_flows.py → 清理
+      # pytest-runner service 在 compose 網路內跑，hostname=postgres-test 直連
+      # schema 由 postgres initdb.d 自動初始化，不依賴 host /opt/api-venv
       - name: Integration Tests (B5 — 真實 DB)
         run: |
           cd apps/api
-          docker compose -f docker-compose.test.yml up -d --wait
-          # schema 初始化
-          docker compose -f docker-compose.test.yml exec -T postgres-test \
-            psql -U awoooi -d awoooi_test \
-            -f /dev/stdin < tests/integration/setup_test_schema.sql
-          # compose 網路名 (目錄名=api → api_default)
-          COMPOSE_NET=$(docker network ls --format '{{.Name}}' | grep '^api_default$' || \
-                        docker network ls --format '{{.Name}}' | grep 'default' | head -1)
-          echo "compose network: $COMPOSE_NET"
-          # 在同一 compose 網路的臨時 python container 內跑 pytest
-          # 掛載原始碼 + venv，hostname=postgres-test 直連 5432
-          docker run --rm \
-            --network "$COMPOSE_NET" \
-            -v /opt/api-venv:/opt/api-venv \
-            -v "$(pwd):/workspace" \
-            -w /workspace \
-            -e TEST_DATABASE_URL="postgresql+asyncpg://awoooi:awoooi_test_2026@postgres-test:5432/awoooi_test?ssl=disable" \
-            python:3.11-slim \
-            /opt/api-venv/bin/pytest tests/integration/test_b5_core_flows.py -v --tb=short
+          docker compose -f docker-compose.test.yml --profile test up \
+            --abort-on-container-exit --exit-code-from pytest-runner
           TEST_EXIT=$?
-          docker compose -f docker-compose.test.yml down -v 2>/dev/null || true
+          docker compose -f docker-compose.test.yml --profile test down -v 2>/dev/null || true
           exit $TEST_EXIT
 
       - name: Login to Harbor
diff --git a/apps/api/docker-compose.test.yml b/apps/api/docker-compose.test.yml
index 9ecbdd63..8fb13f65 100644
--- a/apps/api/docker-compose.test.yml
+++ b/apps/api/docker-compose.test.yml
@@ -17,6 +17,9 @@ services:
       POSTGRES_PASSWORD: awoooi_test_2026
     ports:
       - "15432:5432"
+    # 啟動時自動執行 setup_test_schema.sql (initdb.d 機制)
+    volumes:
+      - ./tests/integration/setup_test_schema.sql:/docker-entrypoint-initdb.d/01-schema.sql:ro
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U awoooi -d awoooi_test"]
       interval: 5s
@@ -34,3 +37,24 @@ services:
       interval: 5s
       timeout: 3s
       retries: 5
+
+  # 2026-04-10 Claude Sonnet 4.6 Asia/Taipei: 整合測試 runner
+  # 在 compose 網路內跑 pytest，hostname=postgres-test 直連，不依賴 host venv
+  pytest-runner:
+    image: python:3.11-slim
+    working_dir: /workspace
+    volumes:
+      - .:/workspace
+    environment:
+      TEST_DATABASE_URL: "postgresql+asyncpg://awoooi:awoooi_test_2026@postgres-test:5432/awoooi_test?ssl=disable"
+    depends_on:
+      postgres-test:
+        condition: service_healthy
+      redis-test:
+        condition: service_healthy
+    command: >
+      sh -c "pip install -q uv &&
+             uv pip install -q --system -e '.[dev]' &&
+             pytest tests/integration/test_b5_core_flows.py -v --tb=short"
+    profiles:
+      - test  # 只在明確指定 --profile test 時才啟動