The author, Tsahi Levent-Levi, showcases how to automate Twilio Contact Center testing using testRTC, a service that enables testing and monitoring of WebRTC-based services. The reference application for the Twilio Contact Center is used as a starting point, with three customer journeys making use of WebRTC technology. TestRTC is chosen for its ease of use and suitability for the task at hand. To set up the test server, a testRTC account, AWS Lambda, and JSON files are required. The author walks through testing video calls and callback voice calling workflows using Twilio Contact Center's reference application and testRTC scripts. For inbound voice calling, an AWS Lambda function is used to instruct a Twilio number to dial into the contact center at a specific time. The author shares how these tests can be modified to cover larger scenarios and scale to 1000s of agents in a contact center.