and running tests continue.
    - None: No exception is raised and no warning is logged.

    Note that if ``on_fail != "raise"``, no exception is raised, even if the checks
    fail. You'd need to inspect the return result of ``check_estimator`` to check
    if any checks failed.

    .. versionadded:: 1.6

callback : callable, or None, default=None
    This callback will be called with the estimator and the check name,
    the exception (if any), the status of the check (xfail, failed, skipped,
    passed), and the reason for the expected failure if the check is
    expected to fail. The callable's signature needs to be::

        def callback(
            estimator,
            check_name: str,
            exception: Exception,
            status: Literal["xfail", "failed", "skipped", "passed"],
            expected_to_fail: bool,
            expected_to_fail_reason: str,
        )

    ``callback`` cannot be provided together with ``on_fail="raise"``.

    .. versionadded:: 1.6

Returns
-------
test_results : list
    List of dictionaries with the results of the failing tests, of the form::

        {
            "estimator": estimator,
            "check_name": check_name,
            "exception": exception,
            "status": status (one of "xfail", "failed", "skipped", "passed"),
            "expected_to_fail": expected_to_fail,
            "expected_to_fail_reason": expected_to_fail_reason,
        }

estimator_checks_generator : generator
    Generator that yields (estimator, check) tuples. Returned when
    `generate_only=True`.

    ..
        TODO(1.8): remove return value

    .. deprecated:: 1.6
        ``generate_only`` will be removed in 1.8. Use
        :func:`~sklearn.utils.estimator_checks.estimator_checks_generator` instead.

Raises
------
Exception
    If ``on_fail="raise"``, the exception raised by the first failing check is
    raised and running tests are aborted.

    Note that if ``on_fail != "raise"``, no exception is raised, even if the checks
    fail. You'd need to inspect the return result of ``check_estimator`` to check
    if any checks failed.

See Also
--------
parametrize_with_checks : Pytest specific decorator for parametrizing estimator
    checks.
estimator_checks_generator : Generator that yields (estimator, check) tuples.

Examples
--------
>>> from sklearn.utils.estimator_checks import check_estimator
>>> from sklearn.linear_model import LogisticRegression
>>> check_estimator(LogisticRegression())
[...]
r<