Test failures with Matplotlib 3.11.0rc1

[QuLogic]

Describe the bug

context
Running a test build against Matplotlib 3.11.0rc1, 6 tests fail

expectation
I expected tests to pass.

bug

=================================== FAILURES ===================================
_______________________ test_complex_outputs_unrun_cache _______________________

sphinx_run = <conftest.SphinxFixture object at 0x7f34b8968ad0>
file_regression = <conftest.FileRegression object at 0x7f34b8a05ef0>
check_nbs = <function check_nbs.<locals>._check_nbs at 0x7f34b89cb690>

    @pytest.mark.sphinx_params(
        "complex_outputs_unrun.ipynb", conf={"nb_execution_mode": "cache"}
    )
    def test_complex_outputs_unrun_cache(sphinx_run, file_regression, check_nbs):
        sphinx_run.build()
        # print(sphinx_run.status())
        assert sphinx_run.warnings() == ""
>       regress_nb_doc(file_regression, sphinx_run, check_nbs)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:217: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:38: in regress_nb_doc
    file_regression.check(doctree_string, extension=".xml", encoding="utf-8")
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <conftest.FileRegression object at 0x7f34b8a05ef0>
data = '<document source="complex_outputs_unrun" translation_progress="{\'total\': 0, \'translated\': 0}">\n    <container ce...             <emphasis>\n                                        some\n                                     markdown\n'
kwargs = {'encoding': 'utf-8', 'extension': '.xml'}

    def check(self, data, **kwargs):
>       return self.file_regression.check(self._strip_ignores(data), **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AssertionError: FILES DIFFER:
E       /tmp/pytest-of-mockbuild/pytest-0/test_complex_outputs_unrun_cac0/test_complex_outputs_unrun_cache.xml
E       /tmp/pytest-of-mockbuild/pytest-0/test_complex_outputs_unrun_cac0/test_complex_outputs_unrun_cache.obtained.xml
E       HTML DIFF: /tmp/pytest-of-mockbuild/pytest-0/test_complex_outputs_unrun_cac0/test_complex_outputs_unrun_cache.obtained.diff.html
E       --- 
E       +++ 
E       @@ -214,7 +214,7 @@
E                                    (√5⋅ⅈ)      ⋅⎜─ - ──────⎟ + (-√5⋅ⅈ)      ⋅⎜─ + ──────⎟
E                                                 ⎝2     5   ⎠                 ⎝2     5   ⎠
E                            <container mime_type="image/png">
E       -                        <image candidates="{'*': '_build/jupyter_execute/6eb6048123e3f61d57d1974b38656227f18e9cb97543c8d59b4418c7c2d40a17.png'}" uri="_build/jupyter_execute/6eb6048123e3f61d57d1974b38656227f18e9cb97543c8d59b4418c7c2d40a17.png">
E       +                        <image candidates="{'*': '_build/jupyter_execute/13b8ca1235ea0301576b74944ed262ee8fd54efbbb3f2ee23355e76c4b7e76f9.png'}" uri="_build/jupyter_execute/13b8ca1235ea0301576b74944ed262ee8fd54efbbb3f2ee23355e76c4b7e76f9.png">
E                            <container mime_type="text/latex">
E                                <math_block classes="output text_latex" nowrap="0" number="True" xml:space="preserve">
E                                    \displaystyle \left(\sqrt{5} i\right)^{\alpha} \left(\frac{1}{2} - \frac{2 \sqrt{5} i}{5}\right) + \left(- \sqrt{5} i\right)^{\alpha} \left(\frac{1}{2} + \frac{2 \sqrt{5} i}{5}\right)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/conftest.py:316: AssertionError
----------------------------- Captured stderr call -----------------------------
[IPKernelApp] WARNING | debugpy_stream undefined, debugging will not be enabled
_______________________ test_complex_outputs_unrun_auto ________________________

sphinx_run = <conftest.SphinxFixture object at 0x7f34b87f50d0>
file_regression = <conftest.FileRegression object at 0x7f34b87fc210>
check_nbs = <function check_nbs.<locals>._check_nbs at 0x7f34b87f54e0>

    @pytest.mark.sphinx_params(
        "complex_outputs_unrun.ipynb", conf={"nb_execution_mode": "auto"}
    )
    def test_complex_outputs_unrun_auto(sphinx_run, file_regression, check_nbs):
        sphinx_run.build()
        # print(sphinx_run.status())
        assert sphinx_run.warnings() == ""
>       regress_nb_doc(file_regression, sphinx_run, check_nbs)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:238: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:38: in regress_nb_doc
    file_regression.check(doctree_string, extension=".xml", encoding="utf-8")
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <conftest.FileRegression object at 0x7f34b87fc210>
data = '<document source="complex_outputs_unrun" translation_progress="{\'total\': 0, \'translated\': 0}">\n    <container ce...             <emphasis>\n                                        some\n                                     markdown\n'
kwargs = {'encoding': 'utf-8', 'extension': '.xml'}

    def check(self, data, **kwargs):
>       return self.file_regression.check(self._strip_ignores(data), **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AssertionError: FILES DIFFER:
E       /tmp/pytest-of-mockbuild/pytest-0/test_complex_outputs_unrun_aut0/test_complex_outputs_unrun_auto.xml
E       /tmp/pytest-of-mockbuild/pytest-0/test_complex_outputs_unrun_aut0/test_complex_outputs_unrun_auto.obtained.xml
E       HTML DIFF: /tmp/pytest-of-mockbuild/pytest-0/test_complex_outputs_unrun_aut0/test_complex_outputs_unrun_auto.obtained.diff.html
E       --- 
E       +++ 
E       @@ -214,7 +214,7 @@
E                                    (√5⋅ⅈ)      ⋅⎜─ - ──────⎟ + (-√5⋅ⅈ)      ⋅⎜─ + ──────⎟
E                                                 ⎝2     5   ⎠                 ⎝2     5   ⎠
E                            <container mime_type="image/png">
E       -                        <image candidates="{'*': '_build/jupyter_execute/6eb6048123e3f61d57d1974b38656227f18e9cb97543c8d59b4418c7c2d40a17.png'}" uri="_build/jupyter_execute/6eb6048123e3f61d57d1974b38656227f18e9cb97543c8d59b4418c7c2d40a17.png">
E       +                        <image candidates="{'*': '_build/jupyter_execute/13b8ca1235ea0301576b74944ed262ee8fd54efbbb3f2ee23355e76c4b7e76f9.png'}" uri="_build/jupyter_execute/13b8ca1235ea0301576b74944ed262ee8fd54efbbb3f2ee23355e76c4b7e76f9.png">
E                            <container mime_type="text/latex">
E                                <math_block classes="output text_latex" nowrap="0" number="True" xml:space="preserve">
E                                    \displaystyle \left(\sqrt{5} i\right)^{\alpha} \left(\frac{1}{2} - \frac{2 \sqrt{5} i}{5}\right) + \left(- \sqrt{5} i\right)^{\alpha} \left(\frac{1}{2} + \frac{2 \sqrt{5} i}{5}\right)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/conftest.py:316: AssertionError
----------------------------- Captured stderr call -----------------------------
[IPKernelApp] WARNING | debugpy_stream undefined, debugging will not be enabled
___________________________ test_custom_convert_auto ___________________________

sphinx_run = <conftest.SphinxFixture object at 0x7f34b2c4eac0>
file_regression = <conftest.FileRegression object at 0x7f34b2c454f0>
check_nbs = <function check_nbs.<locals>._check_nbs at 0x7f34b2c45430>

    @pytest.mark.sphinx_params(
        "custom-formats.Rmd",
        conf={
            "nb_execution_mode": "auto",
            "nb_custom_formats": {".Rmd": ["jupytext.reads", {"fmt": "Rmd"}]},
        },
    )
    def test_custom_convert_auto(sphinx_run, file_regression, check_nbs):
        sphinx_run.build()
        # print(sphinx_run.status())
        assert sphinx_run.warnings() == ""
>       regress_nb_doc(file_regression, sphinx_run, check_nbs)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:342: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:38: in regress_nb_doc
    file_regression.check(doctree_string, extension=".xml", encoding="utf-8")
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <conftest.FileRegression object at 0x7f34b2c454f0>
data = '<document source="custom-formats" translation_progress="{\'total\': 0, \'translated\': 0}">\n    <section ids="custom...0b88824f0435.png" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">\n'
kwargs = {'encoding': 'utf-8', 'extension': '.xml'}

    def check(self, data, **kwargs):
>       return self.file_regression.check(self._strip_ignores(data), **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AssertionError: FILES DIFFER:
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_auto0/test_custom_convert_auto.xml
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_auto0/test_custom_convert_auto.obtained.xml
E       HTML DIFF: /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_auto0/test_custom_convert_auto.obtained.diff.html
E       --- 
E       +++ 
E       @@ -19,4 +19,4 @@
E                                <literal_block classes="output text_plain" language="myst-ansi" xml:space="preserve">
E                                    <Figure size 640x480 with 1 Axes>
E                            <container mime_type="image/png">
E       -                        <image candidates="{'*': '_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png'}" uri="_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png">
E       +                        <image candidates="{'*': '_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png'}" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/conftest.py:316: AssertionError
----------------------------- Captured stderr call -----------------------------
[IPKernelApp] WARNING | debugpy_stream undefined, debugging will not be enabled
__________________________ test_custom_convert_cache ___________________________

sphinx_run = <conftest.SphinxFixture object at 0x7f34b29ba510>
file_regression = <conftest.FileRegression object at 0x7f34b292f800>
check_nbs = <function check_nbs.<locals>._check_nbs at 0x7f34b292f740>

    @pytest.mark.sphinx_params(
        "custom-formats.Rmd",
        conf={
            "nb_execution_mode": "cache",
            "nb_custom_formats": {".Rmd": ["jupytext.reads", {"fmt": "Rmd"}]},
        },
    )
    def test_custom_convert_cache(sphinx_run, file_regression, check_nbs):
        """The outputs should be populated."""
        sphinx_run.build()
        assert sphinx_run.warnings() == ""
>       regress_nb_doc(file_regression, sphinx_run, check_nbs)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:362: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:38: in regress_nb_doc
    file_regression.check(doctree_string, extension=".xml", encoding="utf-8")
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <conftest.FileRegression object at 0x7f34b292f800>
data = '<document source="custom-formats" translation_progress="{\'total\': 0, \'translated\': 0}">\n    <section ids="custom...0b88824f0435.png" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">\n'
kwargs = {'encoding': 'utf-8', 'extension': '.xml'}

    def check(self, data, **kwargs):
>       return self.file_regression.check(self._strip_ignores(data), **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AssertionError: FILES DIFFER:
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_cache0/test_custom_convert_cache.xml
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_cache0/test_custom_convert_cache.obtained.xml
E       HTML DIFF: /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_cache0/test_custom_convert_cache.obtained.diff.html
E       --- 
E       +++ 
E       @@ -19,4 +19,4 @@
E                                <literal_block classes="output text_plain" language="myst-ansi" xml:space="preserve">
E                                    <Figure size 640x480 with 1 Axes>
E                            <container mime_type="image/png">
E       -                        <image candidates="{'*': '_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png'}" uri="_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png">
E       +                        <image candidates="{'*': '_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png'}" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/conftest.py:316: AssertionError
----------------------------- Captured stderr call -----------------------------
[IPKernelApp] WARNING | debugpy_stream undefined, debugging will not be enabled
_________________ test_custom_convert_multiple_extensions_auto _________________

sphinx_run = <conftest.SphinxFixture object at 0x7f34b2922970>
file_regression = <conftest.FileRegression object at 0x7f34b2f84e10>
check_nbs = <function check_nbs.<locals>._check_nbs at 0x7f34b28c3c10>

    @pytest.mark.sphinx_params(
        "custom-formats2.extra.exnt",
        conf={
            "nb_execution_mode": "auto",
            "nb_custom_formats": {".extra.exnt": ["jupytext.reads", {"fmt": "Rmd"}]},
        },
    )
    def test_custom_convert_multiple_extensions_auto(
        sphinx_run, file_regression, check_nbs
    ):
        """The outputs should be populated."""
        sphinx_run.build()
        assert sphinx_run.warnings() == ""
>       regress_nb_doc(file_regression, sphinx_run, check_nbs)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:384: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:38: in regress_nb_doc
    file_regression.check(doctree_string, extension=".xml", encoding="utf-8")
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <conftest.FileRegression object at 0x7f34b2f84e10>
data = '<document source="custom-formats2" translation_progress="{\'total\': 0, \'translated\': 0}">\n    <section ids="custo...0b88824f0435.png" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">\n'
kwargs = {'encoding': 'utf-8', 'extension': '.xml'}

    def check(self, data, **kwargs):
>       return self.file_regression.check(self._strip_ignores(data), **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AssertionError: FILES DIFFER:
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_multiple_e0/test_custom_convert_multiple_extensions_auto.xml
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_multiple_e0/test_custom_convert_multiple_extensions_auto.obtained.xml
E       HTML DIFF: /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_multiple_e0/test_custom_convert_multiple_extensions_auto.obtained.diff.html
E       --- 
E       +++ 
E       @@ -19,4 +19,4 @@
E                                <literal_block classes="output text_plain" language="myst-ansi" xml:space="preserve">
E                                    <Figure size 640x480 with 1 Axes>
E                            <container mime_type="image/png">
E       -                        <image candidates="{'*': '_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png'}" uri="_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png">
E       +                        <image candidates="{'*': '_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png'}" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/conftest.py:316: AssertionError
----------------------------- Captured stderr call -----------------------------
[IPKernelApp] WARNING | debugpy_stream undefined, debugging will not be enabled
________________ test_custom_convert_multiple_extensions_cache _________________

sphinx_run = <conftest.SphinxFixture object at 0x7f34b2921470>
file_regression = <conftest.FileRegression object at 0x7f34b28a6030>
check_nbs = <function check_nbs.<locals>._check_nbs at 0x7f34b28809e0>

    @pytest.mark.sphinx_params(
        "custom-formats2.extra.exnt",
        conf={
            "nb_execution_mode": "cache",
            "nb_custom_formats": {".extra.exnt": ["jupytext.reads", {"fmt": "Rmd"}]},
        },
    )
    def test_custom_convert_multiple_extensions_cache(
        sphinx_run, file_regression, check_nbs
    ):
        """The outputs should be populated."""
        sphinx_run.build()
        assert sphinx_run.warnings() == ""
>       regress_nb_doc(file_regression, sphinx_run, check_nbs)

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:406: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/test_execute.py:38: in regress_nb_doc
    file_regression.check(doctree_string, extension=".xml", encoding="utf-8")
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <conftest.FileRegression object at 0x7f34b28a6030>
data = '<document source="custom-formats2" translation_progress="{\'total\': 0, \'translated\': 0}">\n    <section ids="custo...0b88824f0435.png" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">\n'
kwargs = {'encoding': 'utf-8', 'extension': '.xml'}

    def check(self, data, **kwargs):
>       return self.file_regression.check(self._strip_ignores(data), **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
E       AssertionError: FILES DIFFER:
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_multiple_e1/test_custom_convert_multiple_extensions_cache.xml
E       /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_multiple_e1/test_custom_convert_multiple_extensions_cache.obtained.xml
E       HTML DIFF: /tmp/pytest-of-mockbuild/pytest-0/test_custom_convert_multiple_e1/test_custom_convert_multiple_extensions_cache.obtained.diff.html
E       --- 
E       +++ 
E       @@ -19,4 +19,4 @@
E                                <literal_block classes="output text_plain" language="myst-ansi" xml:space="preserve">
E                                    <Figure size 640x480 with 1 Axes>
E                            <container mime_type="image/png">
E       -                        <image candidates="{'*': '_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png'}" uri="_build/jupyter_execute/321b226a9bda4595da09f9389cea3b97e91b9c089e9bab3feae10e2100fc5c38.png">
E       +                        <image candidates="{'*': '_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png'}" uri="_build/jupyter_execute/e6067ad6daef044f92d5793349a0a2a37f0dd699ea4d01a7120a0b88824f0435.png">

/builddir/build/BUILD/myst-nb-1.4.0-build/MyST-NB-1.4.0/tests/conftest.py:316: AssertionError
----------------------------- Captured stderr call -----------------------------
[IPKernelApp] WARNING | debugpy_stream undefined, debugging will not be enabled

Reproduce the bug

Prepare a development environment with Matplotlib 3.11.0rc1, then run pytest.

List your environment

Fedora Rawhide (45)

+ /usr/bin/pytest -v
============================= test session starts ==============================
platform linux -- Python 3.14.4, pytest-9.0.3, pluggy-1.6.0 -- /usr/bin/python3

[QuLogic]

Since the failures is just a hash of a file, I'm uncertain if these changes are acceptable or there may be some bug in the mpl release candidate.

[bsipocz]

The tests are pretty sensitive to mpl versions and I don't think any of us have the capacity to move away from the hash-based approach to something more flexible.

Anyway, pragmatic approach: if you delete the saved outputs then new ones will be generated and can eyeball between the old and new that way to see if you spot an actual regression.