diff --git a/src/plugins/nonebot_bison/post/custom_post.py b/src/plugins/nonebot_bison/post/custom_post.py
index 800637f..38a8e03 100644
--- a/src/plugins/nonebot_bison/post/custom_post.py
+++ b/src/plugins/nonebot_bison/post/custom_post.py
@@ -32,7 +32,7 @@ class _CustomPost(BasePost):
                 md += "{}<br>".format(message_segment.data.get("text", ""))
             elif message_segment.type == "image":
                 try:
-                    # 先尝试获取file的值，没有在尝试获取url的值，都没有则为空
+                    # 先尝试获取file的值，没有再尝试获取url的值，都没有则为空
                     pic_res = message_segment.data.get(
                         "file", message_segment.data.get("url", "")
                     )
diff --git a/tests/platforms/static/custom_post_pic.jpg b/tests/platforms/static/custom_post_pic.jpg
new file mode 100644
index 0000000..e3828e8
Binary files /dev/null and b/tests/platforms/static/custom_post_pic.jpg differ
diff --git a/tests/test_custom_post.py b/tests/test_custom_post.py
index 6f7c101..04423b2 100644
--- a/tests/test_custom_post.py
+++ b/tests/test_custom_post.py
@@ -1,8 +1,10 @@
 import base64
 import hashlib
-import logging
+from pathlib import Path
 
 import pytest
+import respx
+from httpx import Response
 from nonebot.adapters.onebot.v11.message import MessageSegment
 from nonebug.app import App
 
@@ -41,10 +43,21 @@ def test_gene_md(app: App, expect_md, ms_list):
     assert cp_md == expect_md
 
 
+@respx.mock
 @pytest.mark.asyncio
 async def test_gene_pic(app: App, ms_list, pic_hash):
     from nonebot_bison.post.custom_post import CustomPost
 
+    pic_router = respx.get(
+        "http://i0.hdslb.com/bfs/live/new_room_cover/cf7d4d3b2f336c6dba299644c3af952c5db82612.jpg"
+    )
+
+    pic_path = Path(__file__).parent / "platforms" / "static" / "custom_post_pic.jpg"
+    with open(pic_path, mode="rb") as f:
+        mock_pic = f.read()
+
+    pic_router.mock(return_value=Response(200, stream=mock_pic))
+
     cp = CustomPost(message_segments=ms_list)
     cp_pic_bytes: list[MessageSegment] = await cp.generate_pic_messages()