Testing Library is a great bunch of utils to write tests for your UI. It has become the favorite testing choice of many users since it encourages you to write more maintainable and reliable tests, encourages best practices, and doesn't focus on implementation but behavior.

However, testing your app correctly with Testing Library is not always straightforward. _What query variant fits better for this situation? How should I check appearance/disappearance? What is the best way to handle async behaviors? Why am I seeing this particular error or warning? Why am I not getting the expected element?_ These are very typical questions while writing tests with Testing Library.

You are not alone! This course aims to help you master these situations with the assistance of `eslint-plugin-testing-library`: the official ESLint plugin for Testing Library.

The course will boost your Testing Library skills by using this plugin
as a companion when writing tests. You will get instant feedback by linting your tests code, so you can **follow best practices and anticipate common mistakes for Testing Library**, as well as better understand its utils and their main purposes.

Get ready to say goodbye to flaky tests!

Master writing Testing Library tests with eslint-plugin-testing-library by anticipating common mistakes and following best practices

Master Testing Library with ESLint Plugin

---
title: Intro to module 2
description: Introduction to module 2 - Rules for following best practices
role: 'INTRODUCTION'
isPublicLesson: false
privateVideoUrl: https://fullstack.wistia.com/medias/c0tk5pukdd
---

# Introduction

During this module, we will see all the rules under the "Best Practices" category.

There are situations where you can implement something with Testing Library in several ways. However, some of them offer some advantages over the rest, are more maintainable, or generate more understandable errors when failing. Rules in this group will suggest you switch your code to the recommended way.

Introduction to module 2 - Rules for following best practices