fixing tests

Author: chelsea-lin

Diff for: tests/system/small/test_dataframe.py

@@ -4166,9 +4166,7 @@ def test_dataframe_explode(col_names, ignore_index):
         pytest.param(
             ["A", "A"], id="duplicate", marks=pytest.mark.xfail(raises=ValueError)
         ),
-        pytest.param(
-            "unknown", id="unknown", marks=pytest.mark.xfail(raises=ValueError)
-        ),
+        pytest.param("unknown", id="unknown", marks=pytest.mark.xfail(raises=KeyError)),
     ],
 )
 def test_dataframe_explode_xfail(col_names):

Diff for: tests/system/small/test_series.py

@@ -3443,7 +3443,7 @@ def test_series_explode(data):
     pd_s = pd.Series(data)
     pd.testing.assert_series_equal(
         s.explode().to_pandas(),
-        pd_s.explode().astype(),
+        pd_s.explode(),
         check_index_type=False,
         check_dtype=False,
     )