Does it support multiple programming languages?

Yes, it provides specific implementation patterns and best practices for both TypeScript (Jest, Playwright) and Python (Pytest, asyncio).

When should I still use a hardcoded timeout?

Arbitrary timeouts are only appropriate when testing actual timing behaviors, such as verifying a debounce function or a throttle interval.

Can I use this with React Testing Library?

Absolutely. The skill prioritizes using built-in framework helpers like 'findBy' queries and 'waitFor' utilities before suggesting custom fallback implementations.

How does this skill fix flaky tests?

It helps Claude identify race conditions where tests fail because an operation took longer than a hardcoded delay, replacing them with dynamic polling that reacts to real-time events.

What is condition-based waiting?

It is a testing strategy that waits for a specific state or outcome to become true rather than pausing execution for a fixed, arbitrary amount of time.

Condition-Based Waiting

Name: Condition-Based Waiting
Author: rileyhilliard

byrileyhilliard

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Security & Testing

Eliminates flaky tests by replacing unreliable timeouts with robust condition polling and wait patterns.

About

Condition-Based Waiting is a specialized Claude Code skill designed to stabilize test suites by moving away from arbitrary delays like setTimeout or sleep. It provides AI-driven guidance for implementing polling logic that waits for specific application states, such as a DOM element appearing or an async operation completing. By prioritizing actual conditions over time-based guesses, this skill ensures tests run reliably across different environments and CI pipelines, reducing false failures and improving developer productivity.

Key Features

Provides framework-specific patterns for Playwright, Testing Library, and Pytest
62 GitHub stars
Implements custom waitFor fallbacks with configurable intervals and timeouts
Identifies and replaces arbitrary timeouts with smart polling logic
Detects race conditions in asynchronous test suites
Distinguishes between timing-related flakiness and shared state issues

Use Cases

Synchronizing test assertions with complex asynchronous background processes
Refactoring legacy test suites that rely on hardcoded sleep or delay functions
Fixing intermittent test failures in CI/CD pipelines caused by variable load

About

Key Features

Provides framework-specific patterns for Playwright, Testing Library, and Pytest
62 GitHub stars
Implements custom waitFor fallbacks with configurable intervals and timeouts
Identifies and replaces arbitrary timeouts with smart polling logic
Detects race conditions in asynchronous test suites
Distinguishes between timing-related flakiness and shared state issues

Use Cases

Synchronizing test assertions with complex asynchronous background processes
Refactoring legacy test suites that rely on hardcoded sleep or delay functions
Fixing intermittent test failures in CI/CD pipelines caused by variable load