Gleb Bahmutov's blog post explores the integration of application events in end-to-end tests for web applications, using Cypress.io as the test runner. It highlights the process of leveraging the Kuker library to observe Redux store events and verify that the application performs the expected actions and maintains the correct state. The post provides practical examples using a TodoMVC application, demonstrating how to spy on and assert against events during tests. By wrapping the Redux store with Kuker middleware, developers can track events in real time through Chrome DevTools, enhancing the visibility of internal processes during both normal browsing and testing. The blog also illustrates techniques for handling unpredictable web application delays and emitting custom events in frameworks like Hyperapp, while emphasizing the importance of maintaining test independence from implementation details. Overall, it showcases the utility of event-driven testing in confirming the reliability of the model layer beneath the user interface.