Agent skill

Pytest Patterns

pytest best practices for writing comprehensive test suites.

Apache-2.0Auto-check passedTesting & QA

Install Pytest Patterns

skills CLI

$ npx skills add cohen-liel/hivemind --skill pytest-patterns -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind pytest-patterns --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/pytest-patterns .claude/skills/pytest-patterns && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "pytest-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns into .claude/skills/pytest-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pytest-patterns", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add cohen-liel/hivemind --skill pytest-patterns -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind pytest-patterns --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/pytest-patterns .agents/skills/pytest-patterns && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "pytest-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns into .agents/skills/pytest-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pytest-patterns", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add cohen-liel/hivemind --skill pytest-patterns -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind pytest-patterns --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/pytest-patterns .cursor/skills/pytest-patterns && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "pytest-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns into .cursor/skills/pytest-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pytest-patterns", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/cohen-liel/hivemind.git --path .claude/skills/pytest-patterns

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add cohen-liel/hivemind --skill pytest-patterns -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind pytest-patterns --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/pytest-patterns .gemini/skills/pytest-patterns && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "pytest-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns into .gemini/skills/pytest-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pytest-patterns", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install cohen-liel/hivemind pytest-patterns

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add cohen-liel/hivemind --skill pytest-patterns -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/pytest-patterns .github/skills/pytest-patterns && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "pytest-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns into .github/skills/pytest-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pytest-patterns", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add cohen-liel/hivemind --skill pytest-patterns -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install cohen-liel/hivemind pytest-patterns --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/cohen-liel/hivemind.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/pytest-patterns .opencode/skills/pytest-patterns && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "pytest-patterns" agent skill from https://github.com/cohen-liel/hivemind/tree/main/.claude/skills/pytest-patterns into .opencode/skills/pytest-patterns/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "pytest-patterns", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: pytest-patterns
GitHub stars: 110
Token cost: ~806 tokens
SKILL.md length: 76 words
Files: 1
Skills in repo: 33
Repo updated: Apr 18, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

pytest best practices for writing comprehensive test suites.

Running Python tests
SKILL.md covers Structure, conftest.py (Fixtures), Test Patterns and Running Tests, plus 1 more section
Calls pytest
Setting up test fixtures

What it does

Pytest Patterns is an agent skill from cohen-liel/hivemind. pytest best practices for writing comprehensive test suites. Use when writing or running Python tests, setting up test fixtures, mocking, or achieving good test coverage.

Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Unit testing, Test generation and Test coverage. It works with pytest and Python. The repository describes itself as: One prompt. A full AI engineering team. Go lie on the couch. 🧠. The licence is Apache-2.0.

When your agent uses it

Running Python tests
Setting up test fixtures
Achieving good test coverage

Example prompts

“/pytest-patterns”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit 918dd9b. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- pytest
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Pytest Patterns loads about 806 tokens when it runs. Until then it costs about 47 tokens; SKILL.md has 76 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~47
When it runs · the whole SKILL.md, loaded when a task matches: ~806

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cohen-liel/hivemind at commit 918dd9b, republished under its Apache-2.0 licence (© cohen-liel). 76 words, ~806 tokens.

Download SKILL.mdSave it as .claude/skills/pytest-patterns/SKILL.md (or your agent's skills folder).

name: pytest-patterns
description: pytest best practices for writing comprehensive test suites. Use when writing or running Python tests, setting up test fixtures, mocking, or achieving good test coverage.

pytest Patterns

Structure

tests/
  conftest.py        # Shared fixtures
  unit/              # Pure unit tests (no I/O)
  integration/       # DB, Redis, API tests
  e2e/               # Full flow tests
  test_models.py     # Test naming: test_<module>.py

conftest.py (Fixtures)

python

import pytest
from httpx import AsyncClient, ASGITransport
from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession

@pytest.fixture(scope="session")
def event_loop():
    loop = asyncio.new_event_loop()
    yield loop
    loop.close()

@pytest.fixture(scope="session")
async def engine():
    engine = create_async_engine("postgresql+asyncpg://test:test@localhost/test_db")
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    yield engine
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.drop_all)

@pytest.fixture
async def db(engine):
    async with AsyncSession(engine) as session:
        yield session
        await session.rollback()

@pytest.fixture
async def client(db):
    app.dependency_overrides[get_db] = lambda: db
    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as c:
        yield c
    app.dependency_overrides.clear()

@pytest.fixture
async def user(db):
    u = User(email="test@example.com", name="Test")
    db.add(u)
    await db.flush()
    return u

Test Patterns

python

# Parametrize for edge cases
@pytest.mark.parametrize("email,valid", [
    ("user@example.com", True),
    ("invalid", False),
    ("", False),
    ("a" * 300 + "@x.com", False),
])
async def test_email_validation(email, valid):
    ...

# Mock external services
from unittest.mock import AsyncMock, patch

async def test_sends_email(client, user):
    with patch("app.services.email.send") as mock_send:
        mock_send.return_value = None
        resp = await client.post("/users/verify", json={"email": user.email})
        assert resp.status_code == 200
        mock_send.assert_called_once_with(user.email, subject="Verify your account")

# Test error cases
async def test_get_user_not_found(client):
    resp = await client.get("/users/99999")
    assert resp.status_code == 404
    assert "not found" in resp.json()["detail"].lower()

Running Tests

bash

# Full suite with coverage
pytest tests/ -v --tb=short --cov=app --cov-report=term-missing

# Fast: only unit tests
pytest tests/unit/ -v

# Specific test
pytest tests/test_auth.py::test_login_success -v

# Stop on first failure
pytest -x

Rules

Every fixture that creates DB data must rollback after test
Mock ALL external APIs (email, Stripe, S3) — never call real ones in tests
Test both success AND failure paths for every endpoint
Use parametrize for boundary conditions
Keep unit tests pure (no I/O, no DB) — they must run in < 1ms each
Coverage goal: 80%+ for services, 60%+ overall
Test names must describe WHAT they test: test_login_with_wrong_password_returns_401

Files

Just SKILL.md in .claude/skills/pytest-patterns of cohen-liel/hivemind.

Open the folder on GitHubat commit 918dd9b

Compare with similar skills

Pytest Patterns next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Pytest Patterns compared with similar skills
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Test Coverage Reviewareed1192/finance-news-aggregator	149	—	~2.6k	Automated safety check: Pass	MIT	5 mo ago
Mutation Test Strength Auditbuildfastwithai/gen-ai-experiments	785	—	~641	Automated safety check: Pass	MIT	16 days ago
TDD Guidealirezarezvani/claude-skills	28k	—	~3.4k	Automated safety check: Pass	MIT	1 mo ago
TDD GuideLeoYeAI/openclaw-master-skills	2.2k	—	~1.4k	Automated safety check: Pass	MIT	2 mo ago
Test Oracle GeneratorArabelaTso/Skills-4-SE	253	—	~3.5k	Automated safety check: Pass	Apache-2.0	1 mo ago

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Questions about Pytest Patterns

What does Pytest Patterns do?

pytest best practices for writing comprehensive test suites. Pytest Patterns is an agent skill from cohen-liel/hivemind. pytest best practices for writing comprehensive test suites.

When should I use Pytest Patterns?

Pytest Patterns fits situations like: running Python tests; setting up test fixtures; achieving good test coverage.

How do I install Pytest Patterns in Claude Code?

Run `npx skills add cohen-liel/hivemind --skill pytest-patterns -a claude-code`. Or copy the skill folder (.claude/skills/pytest-patterns in cohen-liel/hivemind) into .claude/skills/pytest-patterns in your project. Claude Code loads it when a task matches its description.

How do I install Pytest Patterns in Codex?

Run `npx skills add cohen-liel/hivemind --skill pytest-patterns -a codex`. Or copy the skill folder (.claude/skills/pytest-patterns in cohen-liel/hivemind) into .agents/skills/pytest-patterns in your project. Codex loads it when a task matches its description.

Can I use Pytest Patterns in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cohen-liel/hivemind --skill pytest-patterns -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pytest-patterns, .gemini/skills/pytest-patterns, .github/skills/pytest-patterns and .opencode/skills/pytest-patterns in your project.

What does Pytest Patterns need to run?

Going by SKILL.md and its folder, Pytest Patterns needs the command-line tools its instructions call (pytest). Our summary lists: Python 3.

Does Pytest Patterns access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Pytest Patterns safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Pytest Patterns use?

Pytest Patterns is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Pytest Patterns use?

About 806 tokens (SKILL.md is roughly 3.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Pytest Patterns?

Skills that share tags, products or a category with Pytest Patterns: Test Coverage Review (areed1192/finance-news-aggregator, 149 stars), Mutation Test Strength Audit (buildfastwithai/gen-ai-experiments, 785 stars), TDD Guide (alirezarezvani/claude-skills, 28k stars) and TDD Guide (LeoYeAI/openclaw-master-skills, 2.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Pytest Patterns?

cohen-liel (a GitHub user) maintains it in cohen-liel/hivemind, which has 110 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on April 18, 2026.

Source: cohen-liel/hivemind on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Pytest Patterns

Install Pytest Patterns

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

pytest Patterns

Structure

conftest.py (Fixtures)

Test Patterns

Running Tests

Rules

Files

Compare with similar skills

Similar skills

Test Coverage Review

Mutation Test Strength Audit

TDD Guide

TDD Guide

Test Oracle Generator

Adk Verify Snippets

More from cohen-liel/hivemind

API Design

Graphql API

Async Python

Celery Tasks

Docker Deployment

E2E Testing

Questions about Pytest Patterns

Install Pytest Patterns

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

pytest Patterns

Structure

conftest.py (Fixtures)

Test Patterns

Running Tests

Rules

Files

Compare with similar skills

Similar skills

More from cohen-liel/hivemind

Related

Questions about Pytest Patterns