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
Catch UI regressions with Percy visual testing, snapshot strategy, Playwright and Cypress integration, responsive widths, dynamic-content stabilization, review workflow discipline, and CI gating without approval fatigue.
Enforcing performance budgets in CI/CD including bundle size limits, load time thresholds, Lighthouse score gates, and resource count limits.
Generate realistic performance test scenarios with load profiles, ramp-up patterns, think times, and acceptance criteria derived from production traffic analysis
Comprehensive PHP testing with PHPUnit covering assertions, data providers, mocking, test doubles, database testing, and HTTP testing for reliable PHP application development.
Testing CI/CD pipeline configurations including build validation, deployment verification, rollback testing, and pipeline-as-code quality checks.
Enterprise-grade Playwright test automation framework using 8-layer architecture with Page Object Model, Module Pattern, custom fixtures, API testing layer, structured logging, data generators, multi-browser support, Docker, CI/CD pipelines, and custom HTML reporting.
API testing skill using Playwright's built-in APIRequestContext for RESTful service validation, authentication flows, and API contract verification.
Comprehensive end-to-end testing skill using Playwright for web applications, covering page objects, selectors, assertions, waits, fixtures, and test organization.
Mobile web testing skill using Playwright device emulation covering responsive testing, touch interactions, viewport management, network throttling, geolocation testing, and mobile-specific UI patterns.
Network-level testing with Playwright including request interception, response mocking, network throttling, and HAR recording/replay.
Teaches the agent to structure tests with test.step, attach evidence and annotations via test.info, use soft assertions, and produce readable, debuggable Playwright HTML reports.
AI-enhanced visual testing with Playwright combining screenshot comparison, visual AI engines, and intelligent diff analysis for catching visual regressions at scale.
Visual regression testing with Playwright including screenshot comparison, pixel-diff thresholds, dynamic content masking, and cross-browser visual validation.
API testing skill using Postman and Newman, covering collections, environments, pre-request scripts, test scripts, and CI/CD integration with Newman.
Automated API testing using Postman collections with Newman CLI for CI/CD integration, environment management, and test reporting.
Review pull requests for test coverage like a senior SDET, map the diff to required test classes, spot untested branches and missing regression tests, judge test quality not just presence, and write actionable review comments.
Analyze pull request code changes to determine which tests are affected, recommend test execution order, and identify missing test coverage for modified code paths
Build lightweight production smoke test suites that verify critical user paths, API health, and third-party integrations after every deployment.
Comprehensive prompt testing and LLM output evaluation skill covering hallucination detection, response quality scoring, regression testing for prompts, A/B testing, and building evaluation pipelines for AI-powered applications.
Property-based testing using hypothesis, fast-check, and QuickCheck to generate random test inputs and verify program invariants automatically.
Comprehensive Protractor end-to-end testing skill for Angular and AngularJS applications with Angular-specific locators, automatic waitForAngular synchronization, Page Object patterns, and migration guidance to modern frameworks.
Comprehensive Puppeteer browser automation and testing skill for headless Chrome scripting, web scraping, PDF generation, network interception, and end-to-end test workflows in JavaScript and TypeScript.
PWA testing skill covering service worker validation, offline mode testing, cache strategy verification, web app manifest testing, push notification testing, install prompt testing, and background sync verification.
Opinionated pytest patterns for AI agents - conftest fixture scoping, parametrize, markers, pyproject config, coverage, xdist parallelism, mocking, and AAA-structured test naming.
Python testing skill using pytest, covering fixtures, parametrize, markers, conftest, plugins, mocking, and advanced testing patterns.
Comprehensive Python testing best practices with pytest, covering unit testing, integration testing, mocking, fixtures, property-based testing, and test architecture.
Comprehensive Python unittest skill covering TestCase patterns, assertion methods, mocking with unittest.mock, subtests, fixtures, and test organization for robust Python application testing.
Turn Claude Code into an autonomous QA agent — an explore, generate, run, heal, report loop that maps the app, writes tests for real user journeys, executes them, self-heals broken locators, and reports coverage. Build a QA agent skill for Claude Code.
Teach agents to define and enforce CI quality gates for diff coverage, flaky tests, performance budgets, security thresholds, and regression health.
Testing message queue implementations including RabbitMQ, SQS, and Kafka with delivery guarantees, ordering, dead letter queues, and consumer testing.
Detect and diagnose race conditions in web applications through concurrent interaction testing, state mutation analysis, and timing-sensitive scenario reproduction.
Gate RAG pipelines in CI with versioned golden eval sets, per-metric thresholds, baseline drift detection, and a build that fails when retrieval or answer quality regresses.
Rails application testing with RSpec, FactoryBot, Capybara, system tests, request specs, model specs, and Rails-specific testing conventions.
Component testing using React Testing Library with user-centric queries, accessibility-focused selectors, and integration testing patterns.
Testing real-time collaborative features including conflict resolution, CRDT validation, cursor presence, and concurrent editing scenarios.
Redis testing including cache behavior verification, pub/sub testing, transaction testing, cluster failover testing, and data expiration validation.
Convert bug reports and incident post-mortems into automated regression tests that prevent recurrence of previously discovered defects.
Intelligent regression test selection using code change analysis, dependency graphs, and risk assessment to minimize test execution time.
Testing patterns for Remix applications covering loader testing, action testing, route testing, form submission testing, and nested route integration testing.
Automated responsive design testing across breakpoints, viewports, and devices with visual comparison and layout verification.
API testing skill using REST Assured for Java, covering request specifications, response validation, authentication, JSON schema validation, and serialization.
Production-grade REST API automation framework with REST Assured, POJO serialization using GSON, PayloadManager pattern, E2E integration workflows with TestNG ITestContext, and Allure reporting.
Testing retry mechanisms, circuit breakers, bulkheads, and timeout patterns for building resilient distributed systems.
Risk-based testing approach for prioritizing test efforts based on business impact, change frequency, complexity, and historical defect patterns.
Expert-level Robot Framework testing skill covering keyword-driven syntax, SeleniumLibrary, RequestsLibrary, custom Python keywords, data-driven testing, resource files, and parallel execution with Pabot.
Comprehensive Ruby testing with RSpec including describe/context/it blocks, matchers, let/before hooks, mocking with doubles, shared examples, and Rails integration.
Classic xUnit-style Ruby testing with Test::Unit covering assertions, fixtures, test case organization, mocking patterns, and lifecycle hooks for reliable Ruby application testing.
Rust testing with built-in test framework, integration tests, doc tests, property-based testing with proptest, and cargo test configuration.