...You can find detailed guides for migrating eslint-plugin-testing-library in the migration guide docs. Add testing-library to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix. With the default setup mentioned before, eslint-plugin-testing-library will be run against your whole codebase. You can run this plugin only against your tests files. One way of restricting ESLint config by file patterns is by using ESLint overrides. Another approach for customizing ESLint config by paths is through ESLint Cascading and Hierarchy. This is useful if all your tests are placed under the same folder, so you can place there another .eslintrc where you enable eslint-plugin-testing-library for applying it only to the files under such folder, rather than enabling it on your global .eslintrc which would apply to your whole project.