diff --git a/docs4/reme_design.md b/docs4/reme_design.md
index c513dcc4..66acb982 100644
--- a/docs4/reme_design.md
+++ b/docs4/reme_design.md
@@ -1,3 +1,14 @@
+# 快速测试
+
+```bash
+# 终端 A：启动服务
+reme4 start
+
+# 终端 B：调用 version 验证服务可用
+reme4 version
+# 预期输出：✅ ReMe v{__version__}
+```
+
 # 基础Job
 
 @jinli
diff --git a/tests4/unittest/test_file_graph.py b/tests4/unittest/test_file_graph.py
index a029b02a..1dc3f6f5 100644
--- a/tests4/unittest/test_file_graph.py
+++ b/tests4/unittest/test_file_graph.py
@@ -84,7 +84,7 @@ def test_upsert_replaces_old_links(backend_cls):
                     make_node("a.md", [("b.md", None)]),
                     make_node("b.md"),
                     make_node("c.md"),
-                ]
+                ],
             )
             assert {lnk.target_path for lnk in await graph.get_outlinks("a.md")} == {"b.md"}
 
@@ -115,7 +115,7 @@ def test_outlinks_skip_virtual_targets(backend_cls):
                 [
                     make_node("a.md", [("b.md", None), ("ghost.md", None)]),
                     make_node("b.md"),
-                ]
+                ],
             )
 
             outs = await graph.get_outlinks("a.md")
@@ -165,7 +165,7 @@ def test_delete_node_demotes_inbound(backend_cls):
                 [
                     make_node("a.md", [("b.md", None)]),
                     make_node("b.md"),
-                ]
+                ],
             )
             assert {lnk.source_path for lnk in await graph.get_inlinks("b.md")} == {"a.md"}
 
@@ -200,7 +200,7 @@ def test_delete_outgoing_links_cleared(backend_cls):
                 [
                     make_node("a.md", [("b.md", None)]),
                     make_node("b.md"),
-                ]
+                ],
             )
             await graph.delete_nodes(["a.md"])
 
@@ -225,7 +225,7 @@ def test_clear(backend_cls):
                 [
                     make_node("a.md", [("b.md", None)]),
                     make_node("b.md"),
-                ]
+                ],
             )
             await graph.clear()
             assert await graph.get_nodes() == []
@@ -250,7 +250,7 @@ def test_rebuild_links_idempotent(backend_cls):
                     make_node("a.md", [("b.md", None), ("c.md", "h")]),
                     make_node("b.md"),
                     make_node("c.md"),
-                ]
+                ],
             )
 
             before_out = sorted((lnk.target_path, lnk.target_anchor) for lnk in await graph.get_outlinks("a.md"))
@@ -282,7 +282,7 @@ def test_persistence_roundtrip(backend_cls):
                 [
                     make_node("a.md", [("b.md", None)]),
                     make_node("b.md"),
-                ]
+                ],
             )
             await g1.close()  # triggers dump
 
diff --git a/tests4/unittest/test_file_store.py b/tests4/unittest/test_file_store.py
index cc59efd1..e59e305b 100644
--- a/tests4/unittest/test_file_store.py
+++ b/tests4/unittest/test_file_store.py
@@ -153,7 +153,7 @@ def test_delete_by_path_list():
                     make_file("a.md", "alpha"),
                     make_file("b.md", "beta"),
                     make_file("c.md", "gamma"),
-                ]
+                ],
             )
             await store.delete_by_path(["a.md", "b.md"])
 
@@ -215,7 +215,7 @@ def test_keyword_search():
                     make_file("a.md", "python programming language"),
                     make_file("b.md", "java programming language"),
                     make_file("c.md", "python data analysis"),
-                ]
+                ],
             )
 
             results = await store.keyword_search("python", limit=5, search_filter={})