In general, pytest-mock-resources >=2.0 is required for async support and will naturally require python >= 36.

Async is easily supportable outside pytest-mock-resources, by simply using the pmr_<resource>_config fixture for the given resource to get a handle on the requisite configuration required to produce a client yourself.

For example:

from sqlalchemy.engine.url import URL
from sqlalchemy.ext.asyncio import create_async_engine

def async_pg(pmr_postgres_config):
    # or `URL.create` in sqlalchemy 1.4+
    create_async_engine(URL(, database=pmr_postgres_config.database, ...))

However, we’re happy to support default/built-in async client implementations where applicable.

Today, async engines are implemented for: * postgres, using sqlalchemy >=1.4 (with the asyncpg driver)

Generally, support will be available on a per-fixture basis by way of specifying async_=True to the fixture creation function.

For example

import pytest
from sqlalchemy import text
from pytest_mock_resources import create_postgres_fixture

postgres_async = create_postgres_fixture(async_=True)

async def test_basic_postgres_fixture_async(postgres_async):
    async with postgres_async.connect() as conn:
        await conn.execute(text("select 1"))


Generally you will want pytest-asyncio or similar to be installed. This will allow your async fixture to work the same way normal fixtures function.