add version check and skipif on several tests

tests/system/test_read_gbq.py

@@ -5,6 +5,7 @@
 import collections
 import datetime
 import decimal
+import packaging.version
 import random
 
 import db_dtypes
@@ -38,6 +39,7 @@ def writable_table(
     bigquery_client.delete_table(full_table_id)
 
 
+@pytest.mark.skipif(packaging.version.parse(pandas.__version__).release >= (2, 0), reason="")
 @pytest.mark.parametrize(["use_bqstorage_api"], [(True,), (False,)])
 @pytest.mark.parametrize(
     ["query", "expected", "use_bqstorage_apis"],
@@ -545,6 +547,7 @@ def writable_table(
 def test_default_dtypes(
     read_gbq, query, expected, use_bqstorage_apis, use_bqstorage_api
 ):
+
     if use_bqstorage_api not in use_bqstorage_apis:
         pytest.skip(f"use_bqstorage_api={use_bqstorage_api} not supported.")
     # the parameter useQueryCache=False is used in the following function call
@@ -555,6 +558,7 @@ def test_default_dtypes(
         configuration={"query": {"useQueryCache": False}},
     )
     pandas.testing.assert_frame_equal(result, expected)
+    assert False
 
 
 @pytest.mark.parametrize(["use_bqstorage_api"], [(True,), (False,)])