Testing Claude Skills
3 546 testing skills from 425 authors. They run test suites, check accessibility and catch what broke. Half of them fit into 1 796 tokens or less — that is what one costs your context window when the agent loads it. 405 ship runnable scripts rather than instructions alone. 2 of them cannot work without an MCP server, most often rube. We also found 403 copies of these same skills sitting in other people's repositories — counted once here, not 403 times.
3 546 unique 425 authors 2 161 updated this month 331 from vendors
The complete QA skill for Claude Code — turn Claude into an expert QA engineer that picks the right test type, writes reliable Playwright, Cypress, and pytest tests, eliminates flaky tests, enforces coverage, and wires up CI. Claude Code QA testing done right.
Expert-level Codeception testing skill for PHP applications. Covers acceptance, functional, and unit testing with the Actor pattern, BDD-style syntax, Page Objects, API testing, and database helpers.
Testing patterns for Clerk authentication including sign-in flow testing, protected route testing, webhook verification, middleware testing, and organization-based access control
Automated compliance testing using Open Policy Agent, Chef InSpec, and custom policy engines for security baseline validation.
Isolating and testing individual UI components with dependency mocking, state injection, and visual snapshot verification.
Testing application configurations including environment variable validation, feature flag combinations, config file parsing, and default value verification.
Testing concurrent code including race condition detection, deadlock prevention, thread safety verification, and parallel execution correctness.
Contract testing for GraphQL APIs including schema breaking change detection, query compatibility testing, and federated schema validation.
Systematically detect, capture, and categorize browser console errors, warnings, and unhandled exceptions during automated test execution
Generate consumer-driven contract tests using Pact framework to verify API provider-consumer compatibility and prevent integration breaking changes
Contract-first testing approach using Pact, Spring Cloud Contract, or Dredd for ensuring API consumer-provider compatibility.
Consumer-driven contract testing skill using Pact, covering consumer tests, provider verification, Pact Broker integration, and CI/CD workflows.
Effective patterns for using GitHub Copilot to generate, refactor, and maintain test code including prompt engineering for test generation, Copilot Chat for debugging, inline suggestions for assertions, and workspace context optimization.
Testing scheduled tasks and cron jobs including execution timing, idempotency, failure recovery, overlap prevention, and timezone handling.
Testing cookie and session management including secure flags, SameSite policy, session fixation, timeout behavior, and cross-domain cookie handling.
Testing Cross-Origin Resource Sharing configurations for misconfigurations, overly permissive policies, and credential handling vulnerabilities.
Content Security Policy testing and validation to prevent XSS attacks, data injection, and clickjacking through proper CSP header configuration.
Author effective Cursor rules in .cursor/rules/*.mdc - YAML frontmatter (description, globs, alwaysApply), the four rule types, scoped QA rules, subagents, and structure that actually steers the model.
Automated cross-browser testing across Chrome, Firefox, Safari, and Edge with visual comparison, feature detection, and polyfill verification.
Effective test automation patterns with Cursor AI IDE including Composer for test suite generation, Cmd+K for inline test edits, Chat for test debugging, codebase-aware test generation, and rules configuration for testing conventions.
Component testing patterns with Cypress v14 including React, Vue, and Angular component mounting, custom mount commands, interaction testing, visual snapshots, and integration with Vite and Webpack bundlers.
Component testing with Cypress including mount API, React/Vue/Angular component testing, stub patterns, and visual snapshot testing.
End-to-end testing skill using Cypress for web applications, covering custom commands, network intercepts, fixtures, cy.session, and component testing patterns.
Verifying data integrity constraints, referential integrity, data type validation, and consistency checks across database operations.
Systematic dark mode testing covering color contrast, theme switching, persistence, media query respect, component-level theming, and image adaptation.
Testing data pipelines including ETL validation, data quality checks, pipeline orchestration testing, and data lineage verification.
Advanced debugging patterns for test failures covering root cause analysis, flakiness investigation, performance debugging, and systematic troubleshooting methodologies.
Database performance testing including query optimization, index analysis, connection pooling, slow query detection, and N+1 query prevention.
Testing database migration scripts for correctness, rollback safety, data integrity, and zero-downtime migration patterns.
Test LLM applications with DeepEval, pytest-style unit tests for LLM outputs using G-Eval, answer relevancy, faithfulness, hallucination and custom metrics, with CI quality gates and dataset-driven regression runs.
Testing desktop applications built with Electron, Tauri, or native frameworks including window management, IPC, tray icons, and auto-update testing.
Gray-box end-to-end testing for React Native apps with Detox. Covers .detoxrc.js configuration, build and test commands, matchers, device.launchApp control, automatic synchronization, and macOS CI pipelines.
Testing distributed tracing implementations including context propagation, span correlation, baggage handling, and trace sampling verification.
Testing patterns for autonomous AI coding agents like Devin and SWE-Agent including task verification, output validation, sandboxed execution, regression testing for agent behavior, and safety guardrails for autonomous code generation.
DNS configuration testing including record validation, DNSSEC verification, resolution timing, failover testing, and DNS-based service discovery.
Django application testing with TestCase, fixtures, factory_boy, model testing, view testing, middleware testing, and Django REST framework testing.
Testing Docker containers and images including Dockerfile linting, container structure tests, security scanning, and multi-stage build validation.
End-to-end testing for React Native apps using Detox with gray-box testing, synchronization, device simulation, and CI integration.
.NET testing with xUnit, NUnit, MSTest, FluentAssertions, Moq, integration testing with WebApplicationFactory, and Entity Framework testing.
Elasticsearch testing including index management, query validation, mapping verification, bulk operation testing, and search relevance scoring.
Make Claude Code write and maintain end-to-end tests like a senior SDET — Playwright and Cypress flows with stable locators, the Page Object Model, fixtures, reused auth state, network mocking, and flake-free CI. Claude Code E2E testing, done right.
Comprehensive end-to-end testing methodologies and best practices covering architecture, test design, data management, flakiness prevention, and cross-browser strategies.
Email delivery testing including content verification, rendering across clients, spam score checking, link validation, and transactional email workflow testing.
Testing edge computing deployments including latency verification, edge function testing, CDN worker testing, and geo-distributed test execution.
End-to-end database testing with test containers, data seeding, cleanup strategies, transaction isolation, and production data anonymization.
Testing in ephemeral preview environments for pull requests including environment provisioning, data seeding, and automated teardown.
Enforce test quality with ESLint - eslint-plugin-jest, eslint-plugin-playwright, and eslint-plugin-testing-library rules in flat config, blocking focused tests, missing assertions, and flaky waits via a CI lint gate.
Validate error boundary implementations in React and other frameworks ensuring graceful degradation, proper fallback UI rendering, and error recovery flows