Pytest reevaluates walrus operations within assert statements

• a detailed description of the bug or problem you are having
• output of pip list from the virtual environment you are using
• pytest and operating system versions
• minimal example if possible

Ubuntu 22.04, pytest 7.3.2, python 3.10.11

Package Version

exceptiongroup 1.1.1
iniconfig 2.0.0
packaging 23.1
pip 23.1.2
pluggy 1.0.0
pytest 7.3.2
setuptools 67.8.0
tomli 2.0.1
wheel 0.38.4

Pytest 7.3.2 re-evaluates walrus operator statements if they appear in assert statements.

def test_walrus():
    assert (x := 2) == 2
    x  =  3
    assert x == 3, "This test fails because (x := 2) is reevaluated by pytest"
    
def test_walrus_no_assert():
    (x := 2) == 2
    x = 3
    assert x == 3, "This test passes because (x := 2) is not reevaluated"

Start by running the supplied walrus-in-assert example under the reported pytest and Python versions, then compare it with the non-assert example. Trace pytest's assert handling to identify where the expression is reevaluated, add a regression test for the demonstrated behavior, and confirm both tests pass without changing the intended assertion result.