diff --git a/actions/v12/file.py b/actions/v12/file.py
index 5f879f8..b657d9a 100644
--- a/actions/v12/file.py
+++ b/actions/v12/file.py
@@ -238,7 +238,7 @@ async def get_file_name_by_id(file_id: str) -> str | None:
     """
     根据文件 ID 获取文件名
     """
-    with open(ffile_list_path(), "r", encoding="utf-8") as f:
+    with open(file_list_path(), "r", encoding="utf-8") as f:
         file_list = json.load(f)
     if _id := file_list.get(file_id):
         return _id
diff --git a/tests/test_file_action.py b/tests/test_file_action.py
new file mode 100644
index 0000000..8c02217
--- /dev/null
+++ b/tests/test_file_action.py
@@ -0,0 +1,29 @@
+"""actions/v12/file.py 文件 ID 查询的回归测试（issue #138）
+
+issue #138：get_file_name_by_id 中把 file_list_path 误写成 ffile_list_path，
+调用 send_msg 发送 image 时抛 NameError，表情包管理器因此发送失败。
+"""
+import json
+
+from actions.v12.file import get_file_name_by_id, register_saved_file
+from utils.cache import cached_url_path, file_list_path
+
+
+def _reset_cache(file_list: dict, cached_url: dict | None = None) -> None:
+    with open(file_list_path(), "w", encoding="utf-8") as f:
+        json.dump(file_list, f)
+    with open(cached_url_path(), "w", encoding="utf-8") as f:
+        json.dump(cached_url or {}, f)
+
+
+async def test_get_file_name_by_id_命中文件列表():
+    _reset_cache({}, {})
+    file_id = register_saved_file("meme.png", "file-id-138")
+
+    assert await get_file_name_by_id(file_id) == "meme.png"
+
+
+async def test_get_file_name_by_id_未知ID返回None():
+    _reset_cache({}, {})
+
+    assert await get_file_name_by_id("not-exist") is None