mock-firestore
In-memory implementation of Google Cloud Firestore for use in tests
Decision gist · record as of 2026-08-14
Yes, if you are testing code that uses Firestore and want a lightweight, zero-dependency mock. The package is dormant (last release January 2022) but has no known vulnerabilities and works for its stated purpose. Install it only if your Firestore client API usage aligns with the partial feature set documented; verify coverage of the operations your code relies on before committing to it in your test suite.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Python 3.6+ is required.
- Low install friction with no runtime dependencies.
- Maintenance is dormant—last release was in January 2022 and the last commit in August 2024, so the package is not actively developed but remains available and functional for its stated purpose.
License · maintenance · safety
permissive license (permissive) — Licensed under MIT (permissive), so you can use it freely in commercial and private projects with minimal restrictions.
last release 2022-01-24 (1663 days) · last repo commit 2024-08-08 · 79 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 139,644 downloads/mo, #11,293 on PyPI
Alternatives
Verify before relying
pip install mock-firestore
from mock_firestore import MockFirestore
mock_db = MockFirestore()
mock_db.collection('users').document('alice').set({'name': 'Alice'})
doc = mock_db.collection('users').document('alice').get()
print(doc.to_dict())- Extent of API coverage relative to the current Python Firestore client library—description notes 'only a partial implementation'.
- Whether dormant maintenance (last release January 2022) poses a risk if Firestore client API has evolved significantly since then.
What it is and what it does
mock-firestore is an in-memory implementation of the Google Cloud Firestore Python client, designed to replace the real client in unit tests. It mimics the same API surface—collections, documents, queries, transactions, and field transforms—so test code can use it as a drop-in substitute without hitting the live Firestore service. The package has no runtime dependencies and installs cleanly.
The implementation is partial; not every Firestore operation is supported, but the description lists a substantial set of working operations including document CRUD, collection traversal, filtering with where clauses, ordering, limits, cursors, and transaction support. It's useful for fast, isolated unit tests where you need a Firestore-like interface but don't want network calls or cloud infrastructure. Reset the mock with reset() to clear state between tests.
Use it for
- Unit test a Python application that uses Firestore without spinning up a real database or incurring cloud costs.
- Develop and test Firestore queries and transactions locally before deploying to production.
- Mock Firestore in CI/CD pipelines to run tests in parallel without database contention.
- Test error handling and edge cases in Firestore code without risking real data.
- Prototype Firestore-backed features before committing to cloud infrastructure.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you are testing code that uses Firestore and want a lightweight, zero-dependency mock.
The package is dormant (last release January 2022) but has no known vulnerabilities and works for its stated purpose. Install it only if your Firestore client API usage aligns with the partial feature set documented; verify coverage of the operations your code relies on before committing to it in your test suite.
Install
mock-firestore on PyPI
Before you install
Low install friction with no runtime dependencies. Maintenance is dormant—last release was in January 2022 and the last commit in August 2024, so the package is not actively developed but remains available and functional for its stated purpose.
Python 3.6+ is required.
License in practice
Licensed under MIT (permissive), so you can use it freely in commercial and private projects with minimal restrictions.
Quickstart
pip install mock-firestore
from mock_firestore import MockFirestore
mock_db = MockFirestore()
mock_db.collection('users').document('alice').set({'name': 'Alice'})
doc = mock_db.collection('users').document('alice').get()
print(doc.to_dict())Verify before relying
- Extent of API coverage relative to the current Python Firestore client library—description notes 'only a partial implementation'.
- Whether dormant maintenance (last release January 2022) poses a risk if Firestore client API has evolved significantly since then.
Package facts
| License | permissive license permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Dormant 1,663 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 139,644 / month, #11,293 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | License :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9 |
Evidence: mock_firestore-0.11.0-py3-none-any.whl
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