[Bug]: One of the MSMR tests fails in the scheduled tests

[NicolaCourtier]

Python Version

3.10

Describe the bug

One of the tests fails for the MSMR model due to a bug in PyBaMM version 23.9, specifically:
pybamm/models/full_battery_models/lithium_ion/msmr.py:23: OptionError.

elif "particle" in options and options["particle"] == "MSMR":
>           raise pybamm.OptionError(
                "'particle' must be 'MSMR' for MSMR not '{}'".format(
                    options["particle"]
                )
E               pybamm.expression_tree.exceptions.OptionError: 'particle' must be 'MSMR' for MSMR not 'MSMR'

In PyBaMM v24.1, the line is updated (note the not equal) to:

elif "particle" in options and options["particle"] != "MSMR":

Steps to reproduce the behaviour

Run tests/unit/test_models.py::TestModels::test_model_classes with PyBaMM v23.9.

Relevant log output

https://github.com/pybop-team/PyBOP/actions/runs/9398312114/job/25883408789