fakeredis

A fast, pure-Python implementation of the Redis protocol — no server required.

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fakeredis is a drop-in replacement for redis-py and valkey-py that runs entirely in-memory. Write tests that depend on Redis, Valkey, DragonflyDB, KeyDB, or KiviDB — without spinning up a real server, a container, or a network connection.

import fakeredis

r = fakeredis.FakeStrictRedis()
r.set("foo", "bar")
r.get("foo")  # b'bar'

That's it. No server to install, no port to manage, no teardown.

✨ Why fakeredis?

  • 🚀 Zero setup — no Redis server, Docker, or network required. Pure Python.
  • 🔌 Drop-in compatible — same API as redis.Redis and redis.asyncio.Redis.
  • ⚡ Fast & isolated — in-memory, so tests run quickly and start from a clean slate.
  • 🧩 Multi-backend — emulate Redis, Valkey, DragonflyDB, KeyDB, or KiviDB, and pin a specific server version.
  • 📦 Redis Stack support — JSON, Bloom/Cuckoo filters, TimeSeries, and Geo commands.
  • 🤝 Share or isolate state — one shared in-memory server across clients, or independent servers per test.

📥 Installation

pip install fakeredis

Optional extras enable additional command families:

pip install "fakeredis[lua]"          # EVAL / EVALSHA scripting
pip install "fakeredis[json]"         # JSON.* commands
pip install "fakeredis[bf]"           # Bloom / Cuckoo / Count-Min / Top-K filters
pip install "fakeredis[probabilistic]"  # alias for the probabilistic filters
pip install "fakeredis[valkey]"       # Valkey client compatibility

🚀 Quickstart

Use it like redis.Redis:

import fakeredis

r = fakeredis.FakeStrictRedis()
r.lpush("queue", "a", "b", "c")
r.lrange("queue", 0, -1)  # [b'c', b'b', b'a']

Share one in-memory server between clients:

server = fakeredis.FakeServer()
r1 = fakeredis.FakeStrictRedis(server=server)
r2 = fakeredis.FakeStrictRedis(server=server)

r1.set("greeting", "hello")
r2.get("greeting")  # b'hello' — same underlying data

Async is supported too:

import fakeredis


async def main():
    r = fakeredis.FakeAsyncRedis()
    await r.set("foo", "bar")
    await r.get("foo")  # b'bar'

Pin a server type and version:

# Behave like Redis 6 — which is what KeyDB is compatible with...
r = fakeredis.FakeStrictRedis(version=6)
# ...or like Valkey, DragonflyDB or KiviDB
r = fakeredis.FakeStrictRedis(server_type="valkey")
r = fakeredis.FakeStrictRedis(server_type="dragonfly")
r = fakeredis.FakeStrictRedis(server_type="kividb")

Using it in tests (pytest)

import pytest
import fakeredis


@pytest.fixture
def redis_client():
    return fakeredis.FakeStrictRedis()


def test_cache_set(redis_client):
    redis_client.set("user:1", "alice")
    assert redis_client.get("user:1") == b"alice"

See the official documentation for the full list of supported commands and configuration options.

❤️ Sponsor

fakeredis-py is developed and maintained for free. If it saves you time, please consider becoming a sponsor — it directly supports continued development.

🤝 Contributing

Contributions are welcome! Check out the contributing guide and the open issues to get started.

Project links

Data verified by PyPI on Sep 8, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

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3 maintainers

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Avatar for bmerry-ska from gravatar.com bmerry-ska Avatar for cunla from gravatar.com cunla Avatar for jamesls from gravatar.com jamesls

Credits

Author: Daniel Moran

Maintainer: Daniel Moran

GitHub Statistics

Data verified by PyPI on Sep 8, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License expression

BSD-3-Clause
View SPDX License List

Requires

Python >=3.8

Provides Extra

bf cf json lua probabilistic valkey vectorset

Tags

RedisBloom RedisJson RedisTimeSeries dragonfly redis redis-stack testing valkey

Classifiers

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