Unable to run code tests, both serial and parallel

### Describe the bug

Building with Python 3.13 and OpenMP-enabled scipy on Ubuntu succeeeds, but I am unable to run tests, parallel mode or not.

### Steps/Code to Reproduce

Using GitHub Codespaces:

1. Add the `deadsnakes/ppa`, install `python3.13-venv` and `libpython3.13-dev`
2. `python3.13 -m venv sklearn-env`, then activate it
3. Install `libopenblas-openmp-dev`
4. `pip install wheel numpy scipy cython meson-python ninja`
5. `make` (or `make test-code`)

### Expected Results

Tests to pass.

### Actual Results

make test-code:
```
python setup.py build_ext -i
Partial import of sklearn during the build process.
/workspaces/scikit-learn/sklearn-env/lib/python3.13/site-packages/setuptools/config/_apply_pyprojecttoml.py:83: SetuptoolsWarning: `install_requires` overwritten in `pyproject.toml` (dependencies)
  corresp(dist, value, root_dir)
running build_ext
running build_clib
building 'libsvm-skl' library
building 'liblinear-skl' library
copying build/lib.linux-x86_64-cpython-313/sklearn/__check_build/_check_build.cpython-313-x86_64-linux-gnu.so -> sklearn/__check_build
copying build/lib.linux-x86_64-cpython-313/sklearn/_isotonic.cpython-313-x86_64-linux-gnu.so -> sklearn
copying build/lib.linux-x86_64-cpython-313/sklearn/_loss/_loss.cpython-313-x86_64-linux-gnu.so -> sklearn/_loss
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_dbscan_inner.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hierarchical_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_common.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_lloyd.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_elkan.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_minibatch.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hdbscan/_linkage.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster/_hdbscan
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hdbscan/_reachability.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster/_hdbscan
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hdbscan/_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster/_hdbscan
copying build/lib.linux-x86_64-cpython-313/sklearn/datasets/_svmlight_format_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/datasets
copying build/lib.linux-x86_64-cpython-313/sklearn/decomposition/_online_lda_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/decomposition
copying build/lib.linux-x86_64-cpython-313/sklearn/decomposition/_cdnmf_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/decomposition
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_gradient_boosting.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_gradient_boosting.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/histogram.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/splitting.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_binning.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_predictor.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_bitset.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/common.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/feature_extraction/_hashing_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/feature_extraction
copying build/lib.linux-x86_64-cpython-313/sklearn/linear_model/_cd_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/linear_model
copying build/lib.linux-x86_64-cpython-313/sklearn/linear_model/_sgd_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/linear_model
copying build/lib.linux-x86_64-cpython-313/sklearn/linear_model/_sag_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/linear_model
copying build/lib.linux-x86_64-cpython-313/sklearn/manifold/_utils.cpython-313-x86_64-linux-gnu.so -> sklearn/manifold
copying build/lib.linux-x86_64-cpython-313/sklearn/manifold/_barnes_hut_tsne.cpython-313-x86_64-linux-gnu.so -> sklearn/manifold
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_dist_metrics.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/cluster/_expected_mutual_info_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_datasets_pair.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_middle_term_computer.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_base.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_argkmin.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_argkmin_classmode.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_radius_neighbors.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_radius_neighbors_classmode.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/preprocessing/_csr_polynomial_expansion.cpython-313-x86_64-linux-gnu.so -> sklearn/preprocessing
copying build/lib.linux-x86_64-cpython-313/sklearn/preprocessing/_target_encoder_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/preprocessing
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_ball_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_kd_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_partition_nodes.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_quad_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_newrand.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_libsvm.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_liblinear.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_libsvm_sparse.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_splitter.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_criterion.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_utils.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/sparsefuncs_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_cython_blas.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/arrayfuncs.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/murmurhash.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_fast_dict.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_openmp_helpers.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_seq_dataset.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_weight_vector.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_random.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_typedefs.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_heap.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_sorting.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_vector_sentinel.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_isfinite.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
pytest --showlocals -v sklearn --durations=20
ImportError while loading conftest '/workspaces/scikit-learn/sklearn/conftest.py'.
_pytest.pathlib.ImportPathMismatchError: ('sklearn.conftest', '/workspaces/scikit-learn/sklearn-env/lib/python3.13/site-packages/sklearn/conftest.py', PosixPath('/workspaces/scikit-learn/sklearn/conftest.py'))
make: *** [Makefile:29: test-code] Error 4
```

make test-code-parallel:
```
python setup.py build_ext -i
Partial import of sklearn during the build process.
/workspaces/scikit-learn/sklearn-env/lib/python3.13/site-packages/setuptools/config/_apply_pyprojecttoml.py:83: SetuptoolsWarning: `install_requires` overwritten in `pyproject.toml` (dependencies)
  corresp(dist, value, root_dir)
running build_ext
running build_clib
building 'libsvm-skl' library
building 'liblinear-skl' library
copying build/lib.linux-x86_64-cpython-313/sklearn/__check_build/_check_build.cpython-313-x86_64-linux-gnu.so -> sklearn/__check_build
copying build/lib.linux-x86_64-cpython-313/sklearn/_isotonic.cpython-313-x86_64-linux-gnu.so -> sklearn
copying build/lib.linux-x86_64-cpython-313/sklearn/_loss/_loss.cpython-313-x86_64-linux-gnu.so -> sklearn/_loss
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_dbscan_inner.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hierarchical_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_common.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_lloyd.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_elkan.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_k_means_minibatch.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hdbscan/_linkage.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster/_hdbscan
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hdbscan/_reachability.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster/_hdbscan
copying build/lib.linux-x86_64-cpython-313/sklearn/cluster/_hdbscan/_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/cluster/_hdbscan
copying build/lib.linux-x86_64-cpython-313/sklearn/datasets/_svmlight_format_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/datasets
copying build/lib.linux-x86_64-cpython-313/sklearn/decomposition/_online_lda_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/decomposition
copying build/lib.linux-x86_64-cpython-313/sklearn/decomposition/_cdnmf_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/decomposition
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_gradient_boosting.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_gradient_boosting.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/histogram.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/splitting.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_binning.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_predictor.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/_bitset.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/ensemble/_hist_gradient_boosting/common.cpython-313-x86_64-linux-gnu.so -> sklearn/ensemble/_hist_gradient_boosting
copying build/lib.linux-x86_64-cpython-313/sklearn/feature_extraction/_hashing_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/feature_extraction
copying build/lib.linux-x86_64-cpython-313/sklearn/linear_model/_cd_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/linear_model
copying build/lib.linux-x86_64-cpython-313/sklearn/linear_model/_sgd_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/linear_model
copying build/lib.linux-x86_64-cpython-313/sklearn/linear_model/_sag_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/linear_model
copying build/lib.linux-x86_64-cpython-313/sklearn/manifold/_utils.cpython-313-x86_64-linux-gnu.so -> sklearn/manifold
copying build/lib.linux-x86_64-cpython-313/sklearn/manifold/_barnes_hut_tsne.cpython-313-x86_64-linux-gnu.so -> sklearn/manifold
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_dist_metrics.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/cluster/_expected_mutual_info_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/cluster
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_datasets_pair.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_middle_term_computer.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_base.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_argkmin.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_argkmin_classmode.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_radius_neighbors.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/metrics/_pairwise_distances_reduction/_radius_neighbors_classmode.cpython-313-x86_64-linux-gnu.so -> sklearn/metrics/_pairwise_distances_reduction
copying build/lib.linux-x86_64-cpython-313/sklearn/preprocessing/_csr_polynomial_expansion.cpython-313-x86_64-linux-gnu.so -> sklearn/preprocessing
copying build/lib.linux-x86_64-cpython-313/sklearn/preprocessing/_target_encoder_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/preprocessing
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_ball_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_kd_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_partition_nodes.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/neighbors/_quad_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/neighbors
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_newrand.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_libsvm.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_liblinear.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/svm/_libsvm_sparse.cpython-313-x86_64-linux-gnu.so -> sklearn/svm
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_tree.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_splitter.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_criterion.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/tree/_utils.cpython-313-x86_64-linux-gnu.so -> sklearn/tree
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/sparsefuncs_fast.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_cython_blas.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/arrayfuncs.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/murmurhash.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_fast_dict.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_openmp_helpers.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_seq_dataset.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_weight_vector.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_random.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_typedefs.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_heap.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_sorting.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_vector_sentinel.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
copying build/lib.linux-x86_64-cpython-313/sklearn/utils/_isfinite.cpython-313-x86_64-linux-gnu.so -> sklearn/utils
pytest -n auto --showlocals -v sklearn --durations=20
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: -n sklearn
  inifile: /workspaces/scikit-learn/setup.cfg
  rootdir: /workspaces/scikit-learn

make: *** [Makefile:37: test-code-parallel] Error 4
```

### Versions

```shell
System:
    python: 3.13.0b2 (main, Jun  8 2024, 19:41:53) [GCC 9.4.0]
executable: /workspaces/scikit-learn/sklearn-env/bin/python
   machine: Linux-6.5.0-1021-azure-x86_64-with-glibc2.31

Python dependencies:
      sklearn: 1.6.dev0
          pip: 24.0
   setuptools: 70.0.0
        numpy: 2.0.0
        scipy: 1.13.1
       Cython: 3.0.10
       pandas: None
   matplotlib: None
       joblib: 1.4.2
threadpoolctl: 3.5.0

Built with OpenMP: True

threadpoolctl info:
       user_api: blas
   internal_api: openblas
    num_threads: 4
         prefix: libopenblas
       filepath: /usr/lib/x86_64-linux-gnu/openblas-openmp/libopenblasp-r0.3.8.so
        version: 0.3.8
threading_layer: openmp
   architecture: Barcelona

       user_api: openmp
   internal_api: openmp
    num_threads: 4
         prefix: libgomp
       filepath: /usr/lib/x86_64-linux-gnu/libgomp.so.1.0.0
        version: None
```

COMMENT:
Regarding the other error:

```
pytest --showlocals -v sklearn --durations=20
ImportError while loading conftest '/workspaces/scikit-learn/sklearn/conftest.py'.
_pytest.pathlib.ImportPathMismatchError: ('sklearn.conftest', '/workspaces/scikit-learn/sklearn-env/lib/python3.13/site-packages/sklearn/conftest.py', PosixPath('/workspaces/scikit-learn/sklearn/conftest.py'))
make: *** [Makefile:29: test-code] Error 4
```

We should try to reproduce it.

Labels: Bug, Needs Triage