Bug summary

One of the tests in the automated suite has been failing during PRs since this morning:https://github.com/matplotlib/matplotlib/actions/workflows/tests.yml
Tests#25844 and on

Code for reproduction

===========================shorttestsummaryinfo============================FAILEDlib/matplotlib/tests/test_backends_interactive.py::test_interactive_backend[toolmanager-MPLBACKEND=wxagg-BACKEND_DEPS=wx]-Failed:Subprocessfailedtotestintendedbehavior<frozen_collections_abc>:982:UserWarning:TreatthenewToolclassesintroducedinv1.5asexperimentalfornow;theAPIandrcParammaychangeinfutureversions.Traceback (mostrecentcalllast):File"<string>",line1,in<module>File"/home/runner/work/matplotlib/matplotlib/lib/matplotlib/tests/test_backends_interactive.py",line232,in_test_interactive_implassertresult.getvalue()==result_after.getvalue()^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^AssertionError

Actual outcome

=========================== short test summary info ============================
FAILED lib/matplotlib/tests/test_backends_interactive.py::test_interactive_backend[toolmanager-MPLBACKEND=wxagg-BACKEND_DEPS=wx] - Failed: Subprocess failed to test intended behavior
:982: UserWarning: Treat the new Tool classes introduced in v1.5 as experimental for now; the API and rcParam may change in future versions.
Traceback (most recent call last):
File "", line 1, in
File "/home/runner/work/matplotlib/matplotlib/lib/matplotlib/tests/test_backends_interactive.py", line 232, in _test_interactive_impl
assert result.getvalue() == result_after.getvalue()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError

Expected outcome

No hard failures.

Additional information

https://github.com/matplotlib/matplotlib/actions/workflows/tests.yml

Operating system

No response

Matplotlib Version

GitHub Repo / Dev Version

Matplotlib Backend

No response

Python version

No response

Jupyter version

No response

Installation

git checkout