diff --git a/tests/data/pdf/02-CSS.pdf b/tests/data/pdf/02-CSS.pdf
new file mode 100644
index 000000000..ee874340b
Binary files /dev/null and b/tests/data/pdf/02-CSS.pdf differ
diff --git a/tests/metagpt/tools/libs/test_editor.py b/tests/metagpt/tools/libs/test_editor.py
index a148ec7ed..9a6e4b62f 100644
--- a/tests/metagpt/tools/libs/test_editor.py
+++ b/tests/metagpt/tools/libs/test_editor.py
@@ -721,6 +721,7 @@ async def test_index_repo():
             "What principle is introduced by the author to explain the conditions necessary for the emergence of complexity?",
             TEST_DATA_PATH / "pdf/9781444323498.ch2_1.pdf",
         ),
+        ("行高的继承性的代码示例是？", TEST_DATA_PATH / "pdf/02-CSS.pdf"),
     ],
 )
 async def test_similarity_search(query, filename):