⚠️ CI failed on Linux_Nightly.pylatest_pip_scipy_dev (last failure: Oct 17, 2025) ⚠️

**CI is still failing on [Linux_Nightly.pylatest_pip_scipy_dev](https://dev.azure.com/scikit-learn/scikit-learn/_build/results?buildId=81313&view=logs&j=dfe99b15-50db-5d7b-b1e9-4105c42527cf)** (Oct 17, 2025)
- test_pandas_arff_parser_strip_single_quotes[_liac_arff_parser]
- test_pandas_arff_parser_strip_double_quotes[_liac_arff_parser]
- test_fetch_openml_as_frame_true[True-liac-arff-61-dataset_params0-150-4-1]
- test_fetch_openml_as_frame_true[True-liac-arff-61-dataset_params1-150-4-1]
- test_fetch_openml_as_frame_true[True-liac-arff-2-dataset_params2-11-38-1]
- test_fetch_openml_as_frame_true[True-liac-arff-2-dataset_params3-11-38-1]
- test_fetch_openml_as_frame_true[True-liac-arff-561-dataset_params4-209-7-1]
- test_fetch_openml_as_frame_true[True-liac-arff-561-dataset_params5-209-7-1]
- test_fetch_openml_as_frame_true[True-liac-arff-40589-dataset_params6-13-72-6]
- test_fetch_openml_as_frame_true[True-liac-arff-1119-dataset_params7-10-14-1]
- test_fetch_openml_as_frame_true[True-liac-arff-1119-dataset_params8-10-14-1]
- test_fetch_openml_as_frame_true[True-liac-arff-40966-dataset_params9-7-77-1]
- test_fetch_openml_as_frame_true[True-liac-arff-40966-dataset_params10-7-77-1]
- test_fetch_openml_as_frame_true[True-liac-arff-40945-dataset_params11-1309-13-1]
- test_fetch_openml_as_frame_true[False-liac-arff-61-dataset_params0-150-4-1]
- test_fetch_openml_as_frame_true[False-liac-arff-61-dataset_params1-150-4-1]
- test_fetch_openml_as_frame_true[False-liac-arff-2-dataset_params2-11-38-1]
- test_fetch_openml_as_frame_true[False-liac-arff-2-dataset_params3-11-38-1]
- test_fetch_openml_as_frame_true[False-liac-arff-561-dataset_params4-209-7-1]
- test_fetch_openml_as_frame_true[False-liac-arff-561-dataset_params5-209-7-1]
- test_fetch_openml_as_frame_true[False-liac-arff-40589-dataset_params6-13-72-6]
- test_fetch_openml_as_frame_true[False-liac-arff-1119-dataset_params7-10-14-1]
- test_fetch_openml_as_frame_true[False-liac-arff-1119-dataset_params8-10-14-1]
- test_fetch_openml_as_frame_true[False-liac-arff-40966-dataset_params9-7-77-1]
- test_fetch_openml_as_frame_true[False-liac-arff-40966-dataset_params10-7-77-1]
- test_fetch_openml_as_frame_true[False-liac-arff-40945-dataset_params11-1309-13-1]
- test_fetch_openml_consistency_parser[61]
- test_fetch_openml_consistency_parser[1119]
- test_fetch_openml_consistency_parser[40945]
- test_fetch_openml_equivalence_array_dataframe[liac-arff]
- test_fetch_openml_iris_pandas[liac-arff]
- test_fetch_openml_forcing_targets[petalwidth-liac-arff]
- test_fetch_openml_forcing_targets[target_column1-liac-arff]
- test_fetch_openml_equivalence_frame_return_X_y[liac-arff-61]
- test_fetch_openml_equivalence_frame_return_X_y[liac-arff-2]
- test_fetch_openml_equivalence_frame_return_X_y[liac-arff-561]
- test_fetch_openml_equivalence_frame_return_X_y[liac-arff-40589]
- test_fetch_openml_equivalence_frame_return_X_y[liac-arff-1119]
- test_fetch_openml_types_inference[True-61-liac-arff-1-4-0]
- test_fetch_openml_types_inference[True-2-liac-arff-33-6-0]
- test_fetch_openml_types_inference[True-561-liac-arff-1-7-0]
- test_fetch_openml_types_inference[True-40589-liac-arff-6-72-0]
- test_fetch_openml_types_inference[True-1119-liac-arff-9-6-0]
- test_fetch_openml_types_inference[True-40966-liac-arff-1-77-0]
- test_fetch_openml_types_inference[True-40945-liac-arff-3-6-0]
- test_fetch_openml_types_inference[False-61-liac-arff-1-4-0]
- test_fetch_openml_types_inference[False-2-liac-arff-33-6-0]
- test_fetch_openml_types_inference[False-561-liac-arff-1-7-0]
- test_fetch_openml_types_inference[False-40589-liac-arff-6-72-0]
- test_fetch_openml_types_inference[False-1119-liac-arff-9-6-0]
- test_fetch_openml_types_inference[False-40966-liac-arff-1-77-0]
- test_fetch_openml_types_inference[False-40945-liac-arff-3-6-0]
- test_convert_arff_data_dataframe_warning_low_memory_pandas
- test_missing_values_pandas[liac-arff-True]
- test_missing_values_pandas[liac-arff-False]
- test_fetch_openml_strip_quotes
- test_fetch_openml_leading_whitespace
- test_fetch_openml_quotechar_escapechar

COMMENT:
The root cause for the failure in our CI is that `'future.no_silent_downcasting'` is now a deprecated option in pandas `3.0.0.dev0+2551.g531c0e3689` (and we turn warnings into exceptions on that CI build).

```python
>>> pd.get_option("future.no_silent_downcasting")
<ipython-input-7-8ae6f0b7501b>:1: Pandas4Warning: 'future.no_silent_downcasting' is deprecated, please refrain from using it.
  pd.get_option("future.no_silent_downcasting")
```

Labels: Bug