diff --git a/nonebot_bison/admin_page/__init__.py b/nonebot_bison/admin_page/__init__.py
index 6eda5c0..372750a 100644
--- a/nonebot_bison/admin_page/__init__.py
+++ b/nonebot_bison/admin_page/__init__.py
@@ -52,7 +52,7 @@ def init_fastapi():
         app.mount("/bison", nonebot_app, "nonebot-bison")
 
     driver = get_driver()
-    register_router_fastapi(driver, socket_app)
+    register_router_fastapi(driver, socket_app)  # type: ignore
     host = str(driver.config.host)
     port = driver.config.port
     if host in ["0.0.0.0", "127.0.0.1"]:
diff --git a/nonebot_bison/post/custom_post.py b/nonebot_bison/post/custom_post.py
index 4921bc2..04d6163 100644
--- a/nonebot_bison/post/custom_post.py
+++ b/nonebot_bison/post/custom_post.py
@@ -11,7 +11,7 @@ from .abstract_post import BasePost, AbstractPost
 @dataclass
 class _CustomPost(BasePost):
     ms_factories: list[MessageSegmentFactory] = field(default_factory=list)
-    css_path: str | None = None  # 模板文件所用css路径
+    css_path: str = ""  # 模板文件所用css路径
 
     async def generate_text_messages(self) -> list[MessageSegmentFactory]:
         return self.ms_factories
diff --git a/tests/platforms/test_rss.py b/tests/platforms/test_rss.py
index bb80a2f..c380d48 100644
--- a/tests/platforms/test_rss.py
+++ b/tests/platforms/test_rss.py
@@ -46,7 +46,9 @@ def update_time_feed_1():
     root = ET.fromstring(file)
     item = root.find("channel/item")
     current_time = datetime.now(pytz.timezone("GMT")).strftime("%a, %d %b %Y %H:%M:%S %Z")
+    assert item is not None
     pubdate_elem = item.find("pubDate")
+    assert pubdate_elem is not None
     pubdate_elem.text = current_time
     return ET.tostring(root, encoding="unicode")
 
@@ -57,6 +59,7 @@ def update_time_feed_2():
     root = ET.fromstring(file)
     current_time = datetime.now(pytz.timezone("GMT")).strftime("%a, %d %b %Y %H:%M:%S %Z")
     published_element = root.find(".//{*}published")
+    assert published_element is not None
     published_element.text = current_time
     return ET.tostring(root, encoding="unicode")