# Acceptance Testing Strategies (Part 1): Inside-Out and Outside-In

Hello there!👋🧔‍♂️ Have you ever wondered how to ensure your software actually does what users need it to do? That's where acceptance testing comes in! This is Part 1 of a two-part series. Here we cover what acceptance tests are, plus two core strategies: inside-out and outside-in . In Part 2 we'll cover feature tests, the testing pyramid, and best practices for combining all three. Whether you're building a new feature or improving an existing system, understanding these strategies will help you write tests that truly validate your software meets business requirements and user expectations. Overview Acceptance testing is all about verifying that your software meets business requirements and delivers value to users. It's the bridge between "does it work?" and "does it solve the right problem?" In this part we focus on two approaches: Inside-Out Testing - Start from core business logic and work outward Outside-In Testing - Start from user interface and work inward In Part 2 we'll add Fea