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pytest — Claude Code skill: what it does, how to install

Teaches the agent to write tests for support APIs, databases, and background jobs using FastAPI and SQLAlchemy. Sets up pytest fixtures and async tests.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add manutej/luxor-claude-marketplace --skill pytest -a claude-code
Open on GitHub

What pytest does

This skill guides the coding agent through writing backend tests for customer support infrastructure. It focuses on FastAPI endpoints, database transactions in PostgreSQL, and ticket processing workflows.

Inside are patterns for fixture scoping. The database engine initializes once per session, while individual test functions receive isolated sessions with automatic rollbacks. It also provides patterns for mocking third-party email providers and CRM webhooks.

The test suite relies on pytest>=8.0.0, pytest-asyncio>=0.23.0, and sqlalchemy>=2.0.0. Running these suites without the matching pytest plugins will break test discovery immediately.

What it helps with

  • Create database fixtures with automatic transaction rollbacks in PostgreSQL
  • Test asynchronous task queues and webhook deliveries
  • Write test suites for FastAPI ticket endpoints
  • Mock third-party services for email and CRM integrations

Example prompts for the agent

  • Write a pytest database session fixture in SQLAlchemy with automatic rollback for each test
  • Create a test for an async FastAPI ticket creation route with Pydantic payload validation
  • Mock the external email provider using pytest-mock to test SLA escalation logic

How to install pytest

1Skills CLI (Vercel)

npx skills add manutej/luxor-claude-marketplace --skill pytest -a claude-code

2Manually: put the files in place

~/.claude/skills/pytest/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/pytest/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about pytest

How to install pytest in Claude Code?

Run npx skills add manutej/luxor-claude-marketplace --skill pytest -a claude-code in your terminal. The configuration installs to ~/.claude/skills/pytest/SKILL.md.

What does the pytest skill do?

It equips the agent with patterns for testing customer support backends. The agent writes structured fixtures, mocks, and async test cases for FastAPI, SQLAlchemy, and PostgreSQL.

Which libraries are required for these tests?

Your project needs pytest>=8.0.0, pytest-asyncio>=0.23.0, pytest-mock>=3.12.0, fastapi>=0.109.0, and sqlalchemy>=2.0.0.

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