Update packages/google-cloud-bigquery/tests/unit/test_table.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: shuoweil

packages/google-cloud-bigquery/tests/unit/test_table.py

@@ -5824,6 +5824,7 @@ def test_to_dataframe_delegated_when_supported_with_range_types(self):
     def test_to_dataframe_not_delegated_when_unsupported(self):
         import sys
         pandas = pytest.importorskip("pandas")
+        pyarrow = pytest.importorskip("pyarrow")
         mock_pandas_gbq = mock.Mock()
 
         with mock.patch(