Hypothesis is the Python library for property-based testing. Hypothesis can infer how to construct type-annotated classes, and supports builtin types, many standard library types, and generic types from the typing and typing_extensions modules by default.

Pydantic v2.0 drops built-in support for Hypothesis and no more ships with the integrated Hypothesis plugin.


We are temporarily removing the Hypothesis plugin in favor of studying a different mechanism. For more information, see the issue annotated-types/annotated-types#37.

The Hypothesis plugin may be back in a future release. Subscribe to pydantic/pydantic#4682 for updates.