pytest-probatio

Use a probatio schema as a pytest assertion matcher. A schema reads as the expected shape, and a mismatch is explained by probatio's path-precise errors instead of a bare assert.

from pytest_probatio import Exact, Partial
from probatio import Port


def test_response(response):
    # Exact: extra keys make it unequal.
    assert response == Exact({"name": str, "port": Port()})

    # Partial: extra keys are allowed.
    assert response == Partial({"name": str})
    assert Exact({"name": str}) <= response

When the data does not match, the failure lists each error by its path:

data does not match the probatio schema (==):
  port: expected a port number between 1 and 65535

Install it alongside pytest; the plugin registers itself:

pip install pytest-probatio

This package lives in the probatio monorepo but ships separately, so the core probatio library stays dependency-free.

The full guide, including schema reuse across tests and the raises helper, lives at probatio.frenck.dev.

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  • Released:
Newer release available (0.11.1)

2 maintainers

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Avatar for balloob from gravatar.com balloob Avatar for frenck from gravatar.com frenck

Credits

Author/Maintainer: Franck Nijhof

GitHub Statistics

Data verified by PyPI on Jul 9, 2026
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License expression

MIT
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Requires

Python >=3.12

Tags

probatio pytest schema testing validation

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