Swift Testing's Pragmatic Path: Migrate Your Test Suite at Your Own Pace

Swift Testing's adoption has been hindered by misconceptions about requiring a complete test suite migration. WWDC 2026 reveals Apple's pragmatic approach: interoperability allows existing XCTest code and helper functions to coexist with new Swift Testing tests without a full rewrite. This transforms test modernization from an all-or-nothing decision into a sustainable, incremental strategy for large projects.