This tutorial provides a comprehensive guide on using Ktor MockEngine to mock API calls for testing in Android and Kotlin Multiplatform (KMP) applications. Learn how to effectively implement integration testing for your API interactions without making actual network requests. Discover techniques for simulating various API responses, handling different scenarios, and validating your application's behavior under controlled conditions. The 35-minute video covers both the fundamentals of integration testing and specific implementation details for Ktor MockEngine. Gain practical knowledge that can be applied to real-world Android development projects, with complete source code available on GitHub. Perfect for developers looking to improve their testing practices and ensure reliable API interactions in their applications.