XCUITest is a UI testing framework launched by Apple in 2015 that allows developers to test user interface or Apple platform apps using Swift or Objective-C programming language. It's an advantage of XCUITest is the collaboration between developers, as it uses the same language for writing code, making it easier to understand app functionality and leading to better quality apps. fastlane is an open-source platform aimed at simplifying Android and iOS deployment, automating every aspect of development and release workflow, and integrating with over 400 tools and services. It offers easy setup, runs on your machine, and integrates with all major CI systems. The test_center plugin for fastlane makes testing easier by providing actions that give greater control over everything related to testing an app. With the scan action in fastlane, developers can run iOS UI tests locally without needing to build the app first. Additionally, fastlane supports Ruby versions 2.5 or newer and can be installed using Homebrew or Bundler with a local machine. The multiscan feature allows running multiple batches of tests in parallel up to three times if tests fail, and aborting early if there are too many failing tests. When used with Bitrise CI, fastlane simplifies the deployment process by automating every aspect of development and release workflow, reducing hours of manual work.