diff --git a/tests/format/data/structured/demo-dataset.jsonl b/tests/format/data/structured/demo-dataset.jsonl
index 590c029f5..77a0a1d88 100644
--- a/tests/format/data/structured/demo-dataset.jsonl
+++ b/tests/format/data/structured/demo-dataset.jsonl
@@ -1,6 +1,6 @@
-{"text": "Today is Sunday and it's a happy day!", "meta": {"src": "Arxiv"}}
-{"text": "Do you need a cup of coffee?", "meta": {"src": "code"}}
-{"text": "你好，请问你是谁", "meta": {"src": "customized"}}
-{"text": "Sur la plateforme MT4, plusieurs manières d'accéder à ces fonctionnalités sont conçues simultanément.", "meta": {"src": "Oscar"}}
-{"text": "欢迎来到阿里巴巴！", "meta": {"src": "customized"}}
-{"text": "This paper proposed a novel method on LLM pretraining.", "meta": {"src": "customized"}}
\ No newline at end of file
+{"text": "Today is Sunday and it's a happy day!", "meta": {"src": "Arxiv", "date": "2023-04-27", "version": "1.0"}}
+{"text": "Do you need a cup of coffee?", "meta": {"src": "code", "author": "xxx"}}
+{"text": "Today is Sunday and it's a happy day!", "meta": {"src": "Arxiv", "date": "2023-04-27", "version": "1.0"}}
+{"text": "Do you need a cup of coffee?", "meta": {"src": "code", "author": "xxx"}}
+{"text": "Today is Sunday and it's a happy day!", "meta": {"src": "Arxiv", "date": "2023-04-27", "version": "1.0"}}
+{"text": "Do you need a cup of coffee?", "meta": {"src": "code", "author": "xxx"}}
\ No newline at end of file
diff --git a/tests/format/test_unify_format.py b/tests/format/test_unify_format.py
index 2f64d0dcf..c9b41d19d 100644
--- a/tests/format/test_unify_format.py
+++ b/tests/format/test_unify_format.py
@@ -366,8 +366,7 @@ def test_hetero_meta(self):
                 'author': 'xxx'
             }
         }]
-        unified_sample_list = ds.to_list()
-        self.assertEqual(unified_sample_list, sample)
+
         # test nested and missing field for the following cases:
         # 1. first row, then column
         unified_sample_first = ds[0]