diff --git a/CLAUDE.md b/CLAUDE.md
index 1f0a8db..7b47a55 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -11,7 +11,7 @@ Markdown 文档向量数据库 — 将 .md 文件分块 → 嵌入 → 存入 Ch
 ```bash
 # --- 安装与测试 ---
 uv sync                                       # 安装依赖（lockfile 已锁定 CUDA torch）
-uv run pytest tests/ -v                       # 全部测试 (46 个)
+uv run pytest tests/ -v                       # 全部测试 (115+ 个)
 uv run pytest tests/test_api.py -v            # 单个测试模块
 uv run pytest tests/ -v -k "test_search"      # 按名称过滤
 
diff --git a/README.md b/README.md
index be2f275..cb1fc9d 100644
--- a/README.md
+++ b/README.md
@@ -242,7 +242,7 @@ md-vector-db/
 ## 测试
 
 ```bash
-uv run pytest tests/ -v                      # 全部测试 (46 个)
+uv run pytest tests/ -v                      # 全部测试 (115+ 个)
 uv run pytest tests/test_embedder.py -v      # 嵌入器测试
 uv run pytest tests/ -v -k "search"          # 按名称过滤
 uv run pytest tests/ -v --cov=src --cov-report=term-missing  # 覆盖率
diff --git a/src/server/app.py b/src/server/app.py
index 5097c9a..3b0b96f 100644
--- a/src/server/app.py
+++ b/src/server/app.py
@@ -106,7 +106,11 @@ def list_collections(
     state: AppState = Depends(get_state),
     _: bool = Depends(verify_api_key),
 ):
-    return {"collections": state.list_collections_with_stats()}
+    try:
+        return {"collections": state.list_collections_with_stats()}
+    except Exception:
+        logger.exception("列出集合失败")
+        raise HTTPException(status_code=500, detail="服务器内部错误")
 
 
 @app.post("/api/v1/ingest")
diff --git a/src/server/deps.py b/src/server/deps.py
index 04899e6..1ccf2f9 100644
--- a/src/server/deps.py
+++ b/src/server/deps.py
@@ -54,11 +54,8 @@ class AppState:
     def list_collections_with_stats(self) -> list[dict]:
         """列出所有 collection 及其统计（直接从 ChromaDB 查询）."""
         result = []
-        try:
-            for coll in self.db.list_collections():
-                result.append({"name": coll.name, "count": coll.count()})
-        except Exception:
-            logger.exception("列出集合失败")
+        for coll in self.db.list_collections():
+            result.append({"name": coll.name, "count": coll.count()})
         return result
 
     def is_healthy(self) -> dict: