diff --git a/backend/test_bing.py b/backend/test_bing.py
deleted file mode 100644
index a0bc8d2..0000000
--- a/backend/test_bing.py
+++ /dev/null
@@ -1,21 +0,0 @@
-import httpx
-import re
-from urllib.parse import quote
-
-url = 'https://www.bing.com/search?q=' + quote('华为手机推荐') + '&setmkt=zh-CN'
-headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'}
-
-with httpx.Client(timeout=30, follow_redirects=True) as client:
-    resp = client.get(url, headers=headers)
-    html = resp.text
-    print('Status:', resp.status_code)
-    print('Size:', len(html))
-    print('First 500 chars:', html[:500])
-
-    # Try to find result titles
-    titles = re.findall(r'<a[^>]*href="https?://[^"]*"[^>]*>(.*?)</a>', html, re.DOTALL)
-    print('\nPotential titles:', len(titles))
-    for t in titles[:10]:
-        clean = re.sub(r'<[^>]+>', '', t).strip()
-        if clean and len(clean) > 5 and '微软' not in clean and 'Bing' not in clean:
-            print(' -', clean[:80])
diff --git a/backend/test_llm_connection.py b/backend/test_llm_connection.py
deleted file mode 100644
index be98676..0000000
--- a/backend/test_llm_connection.py
+++ /dev/null
@@ -1,38 +0,0 @@
-import httpx
-import asyncio
-
-
-async def test():
-    url = "https://coding.dashscope.aliyuncs.com/v1/chat/completions"
-    headers = {
-        "Authorization": "Bearer sk-sp-c76f198d1b2840c5b5a58dfd4c0cd218",
-        "Content-Type": "application/json"
-    }
-    payload = {
-        "model": "qwen3-coder-plus",
-        "messages": [{"role": "user", "content": "你好，请用一句话确认连接正常"}],
-        "max_tokens": 100
-    }
-    async with httpx.AsyncClient(timeout=30) as client:
-        resp = await client.post(url, json=payload, headers=headers)
-        print(f"Status: {resp.status_code}")
-        if resp.status_code == 200:
-            data = resp.json()
-            print(f"Model: {data['model']}")
-            print(f"Content: {data['choices'][0]['message']['content']}")
-            print("✅ 百炼 Coding Plan API 连通成功!")
-        else:
-            print(f"Error: {resp.text}")
-            # 如果 qwen3-coder-plus 不行，尝试其他模型
-            for model in ["qwen3.5-plus", "qwen3-coder-next", "qwen3-max-2026-01-23"]:
-                payload["model"] = model
-                resp2 = await client.post(url, json=payload, headers=headers)
-                print(f"\nTrying {model}: Status {resp2.status_code}")
-                if resp2.status_code == 200:
-                    data = resp2.json()
-                    print(f"✅ {model} works! Content: {data['choices'][0]['message']['content']}")
-                    break
-                else:
-                    print(f"Error: {resp2.text[:200]}")
-
-asyncio.run(test())
diff --git a/backend/test_wiki.py b/backend/test_wiki.py
deleted file mode 100644
index 45bde6f..0000000
--- a/backend/test_wiki.py
+++ /dev/null
@@ -1,24 +0,0 @@
-import asyncio
-import httpx
-
-async def test_wiki():
-    from app.workers.platforms.search_engine import search_wikipedia
-    result = await search_wikipedia("华为手机", max_chars=1000)
-    print("Wikipedia result length:", len(result))
-    print("First 500 chars:", result[:500])
-    print("Contains 华为:", "华为" in result)
-
-async def test_health():
-    try:
-        async with httpx.AsyncClient() as c:
-            r = await c.get("http://localhost:8000/health")
-            print("Health status:", r.status_code, r.text)
-    except Exception as e:
-        print("Health check failed:", e)
-
-async def main():
-    await test_health()
-    print("---")
-    await test_wiki()
-
-asyncio.run(main())
diff --git a/backend/tests/conftest.py b/backend/tests/conftest.py
index dc3c003..183de4c 100644
--- a/backend/tests/conftest.py
+++ b/backend/tests/conftest.py
@@ -22,6 +22,7 @@ pytest_plugins = [
     "tests.fixtures.database",
     "tests.fixtures.brands",
     "tests.fixtures.client",
+    "tests.fixtures.content",
 ]
 
 
diff --git a/backend/tests/fixtures/content.py b/backend/tests/fixtures/content.py
new file mode 100644
index 0000000..5d0261f
--- /dev/null
+++ b/backend/tests/fixtures/content.py
@@ -0,0 +1,71 @@
+import uuid
+from datetime import datetime, timezone
+
+import pytest_asyncio
+
+from app.models.content import Content
+from app.models.diagnosis_record import DiagnosisRecord
+from app.models.attribution_record import AttributionRecord
+
+from .auth import _to_uuid
+
+
+@pytest_asyncio.fixture
+async def test_content(async_session, test_brand):
+    content = Content(
+        id=uuid.uuid4(),
+        brand_id=_to_uuid(test_brand.id),
+        title="测试内容标题",
+        body="这是一段测试内容，用于验证内容管线功能。",
+        platform="wechat",
+        status="draft",
+        content_type="article",
+    )
+    async_session.add(content)
+    await async_session.commit()
+    await async_session.refresh(content)
+    return content
+
+
+@pytest_asyncio.fixture
+async def test_diagnosis_record(async_session, test_brand):
+    record = DiagnosisRecord(
+        id=uuid.uuid4(),
+        brand_id=_to_uuid(test_brand.id),
+        overall_score=45.0,
+        mention_rate=30.0,
+        recommendation_rank=50.0,
+        sentiment_score=60.0,
+        citation_quality=40.0,
+        competitive_position=35.0,
+        status="completed",
+    )
+    async_session.add(record)
+    await async_session.commit()
+    await async_session.refresh(record)
+    return record
+
+
+@pytest_asyncio.fixture
+async def test_attribution_record(async_session, test_brand, test_diagnosis_record):
+    record = AttributionRecord(
+        id=uuid.uuid4(),
+        brand_id=_to_uuid(test_brand.id),
+        diagnosis_id=str(test_diagnosis_record.id),
+        attribution_window_days=28,
+        before_scores={
+            "mention_rate": 30.0,
+            "recommendation_rank": 50.0,
+            "sentiment_score": 60.0,
+            "citation_quality": 40.0,
+            "competitive_position": 35.0,
+        },
+        after_scores=None,
+        status="tracking",
+        start_at=datetime.now(timezone.utc),
+        window_end_at=datetime(2026, 6, 30, tzinfo=timezone.utc),
+    )
+    async_session.add(record)
+    await async_session.commit()
+    await async_session.refresh(record)
+    return record