--- title: WWDC26: Migrate to Swift Testing | Apple | daily.dev description: A WWDC26 session walkthrough on migrating from XCTest to Swift Testing in Xcode 27. Covers the core building blocks (@Test, #expect macros), a gradual... canonical: https://daily.dev/posts/wwdc26-migrate-to-swift-testing-apple-qtlv3nflq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: WWDC26: Migrate to Swift Testing | Apple | daily.dev og:description: A WWDC26 session walkthrough on migrating from XCTest to Swift Testing in Xcode 27. Covers the core building blocks (@Test, #expect macros), a gradual... og:url: https://daily.dev/posts/wwdc26-migrate-to-swift-testing-apple-qtlv3nflq og:image: https://api.daily.dev/og/posts/QTLv3nFlQ.png og:image:alt: WWDC26: Migrate to Swift Testing | Apple og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # WWDC26: Migrate to Swift Testing | Apple **[Apple Developer](https://daily.dev/sources/appledeveloper)** · 21 min read · 0 upvotes · 0 comments ## Summary A WWDC26 session walkthrough on migrating from XCTest to Swift Testing in Xcode 27. Covers the core building blocks (@Test, #expect macros), a gradual migration strategy that lets both frameworks coexist in the same target, and the new test framework interoperability feature with its four modes (none, limited, complete, strict). Demonstrates reusing XCTest helper functions in Swift Testing tests, replacing XCTFail with Issue.record, and handling cross-framework issues. Also introduces two advanced Swift Testing features: parameterized tests for running combinations in parallel, and exit tests for verifying precondition/fatal-error code paths in isolated child processes. Includes notes on Swift Package Manager support via swift-tools-version 6.4 and the open-source Swift Testing project. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Swift Testing explained with code examples](https://daily.dev/posts/swift-testing-explained-with-code-examples-pgxkvbvk5) · SwiftLee · 1 upvotes · 0 comments --- Tags: [#swift](https://daily.dev/tags/swift), [#xcode](https://daily.dev/tags/xcode) [View this post on daily.dev](https://daily.dev/posts/wwdc26-migrate-to-swift-testing-apple-qtlv3nflq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"WWDC26: Migrate to Swift Testing | Apple","url":"https://daily.dev/posts/wwdc26-migrate-to-swift-testing-apple-qtlv3nflq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/wwdc26-migrate-to-swift-testing-apple-qtlv3nflq"},"datePublished":"2026-06-08T21:25:19.472Z","dateModified":"2026-06-08T21:25:58.829Z","description":"A WWDC26 session walkthrough on migrating from XCTest to Swift Testing in Xcode 27. 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