pydantic pins an exact version of pydantic-core in it's pyproject.toml [1]. This was missed during the last pydantic bump where pydantic-core was erroneously updated to the latest release instead, in commit [2] and [3]. Modify the pydantic runtime test to catch this error in the future. [1] https://github.com/pydantic/pydantic/blob/v2.11.4/pyproject.toml#L49 [2]e1c939e426[3]e42de820cdSigned-off-by: Marcus Hoffmann <buildroot@bubu1.eu> [Julien: add reference to commits introducing the issue] Signed-off-by: Julien Olivain <ju.o@free.fr>