Limitations
Only CPython is supported¶
Currently, inline-snapshot only works with CPython.
On other Python implementations, such as PyPy, inline-snapshot acts as if --inline-snapshot=disable is set, allowing tests to pass but not providing any way to update snapshots.
pytest-xdist is not supported¶
pytest-xdist splits test runs across multiple processes.
This prevents inline-snapshot from being able to update snapshots across multiple processes, so if you have pytest-xdist installed and active, inline-snapshot will act as if --inline-snapshot=disable is set.
If you have pytest-xdist installed and active by default in your pytest settings, you can disable it for a single test run with its -n0 option.
Then inline-snapshot will act as usual, or you can pass alternative flags with --inline-snapshot:
On CPython < 3.11, pytest assert rewriting can be disabled ¶
On CPython versions before 3.11, inline-snapshot must disable pytest assert rewriting if you use any of these flags: report, review, create, fix, trim, or update.