Docker doesn't only revolutionize your application hosting, it also revolutionizes your development pipeline. ING has over 250DevOps teams, thousands of applications and a complex application landscape. ING is simplifying its application landscape in record time while introducing a webscale architecture based on anti-fragility patterns. Speed is vital in this transformation and one of ING’s key assets is it Continuous Delivery Pipeline. In this talk, we will show how ING uses test containers for confidence checks, integration testing on up and downstream services, creating dev/test environments for every feature branch, reverse proxy and CI servers. As a result, we are able to automate test processes and reduce our integration testing costs.