diff --git a/tests/factor/test_data_adapter.py b/tests/factor/test_data_adapter.py
index f44ebc1..01e2e52 100644
--- a/tests/factor/test_data_adapter.py
+++ b/tests/factor/test_data_adapter.py
@@ -28,7 +28,7 @@ def _make_bar(symbol, dt, close):
 
 def test_convert_bars_to_alpha_df_columns():
     """Test that convert_bars_to_alpha_df produces correct column structure."""
-    bars = [_make_bar("600000", datetime(2024, 1, i), 10.0 + i) for i in range(1, 6)]
+    bars = [_make_bar("600000", datetime(2024, 1, i + 1), 10.0 + i) for i in range(5)]
     from sanguo_factor.data_adapter import convert_bars_to_alpha_df
     df = convert_bars_to_alpha_df(bars)
 
@@ -41,7 +41,7 @@ def test_convert_bars_to_alpha_df_columns():
 
 def test_convert_bars_to_alpha_df_values():
     """Test that convert_bars_to_alpha_df correctly converts BarData values."""
-    bars = [_make_bar("600000", datetime(2024, 1, i), 10.0 + i) for i in range(1, 6)]
+    bars = [_make_bar("600000", datetime(2024, 1, i + 1), 10.0 + i) for i in range(5)]
     from sanguo_factor.data_adapter import convert_bars_to_alpha_df
     df = convert_bars_to_alpha_df(bars)
 
@@ -72,7 +72,7 @@ def test_save_alpha_lab_data():
     from pathlib import Path
     from sanguo_factor.data_adapter import save_alpha_lab_data
 
-    bars = [_make_bar("600000", datetime(2024, 1, i), 10.0 + i) for i in range(1, 6)]
+    bars = [_make_bar("600000", datetime(2024, 1, i + 1), 10.0 + i) for i in range(5)]
 
     with tempfile.TemporaryDirectory() as tmpdir:
         lab_path = Path(tmpdir) / "alpha_lab"