Datadog's testing tunnel and private locations offer flexible solutions for internal application testing, enabling organizations to create custom probes with private locations for durable testing and monitoring, and leveraging the testing tunnel for on-demand testing in local and continuous integration environments. The testing tunnel is an NPM package that leverages Datadog's command line interface to create an end-to-end encrypted HTTP proxy between infrastructure and Datadog, allowing organizations to launch tests as part of their CI/CD pipelines and identify and fix regressions before they impact users. Private locations are durable probing services deployed as custom points of presence inside of infrastructure using orchestration tools like Docker Compose, Kubernetes, AWS Fargate, and Amazon ECS, providing a centralized testing tool for teams across the organization and enabling organizations to trigger tests on long-running environments such as staging and pre-production.