Gleb Bahmutov's blog post discusses the integration of end-to-end testing into JAMstack websites using the Cypress Test Runner, highlighting how Markdown pages can include their own tests. He explains the process of embedding tests directly within Markdown files using a Cypress Markdown transpiler, which allows for seamless verification of site functionality. Bahmutov shares his experience presenting on this topic at ReactiveConf 2019, emphasizing the importance of topics like code coverage and writing faster tests. He provides resources such as video timestamps and slide links for those interested in specific topics from his presentation. Additionally, he offers technical tips on configuring Cypress for testing and suggests ways to hide test code in Markdown files to maintain page aesthetics. The blog post is supported by a source repository and a deployed site showcasing these testing techniques in action.