Description SKTestSession.setSimulatedError() does not throw the configured error when testing StoreKit with the .loadProducts API in iOS 26.2. The simulated error is ignored, and products load successfully instead. Environment iOS: 26.2 (Simulator) Xcode: 26.2 beta 2 (Build 17C5038g) macOS: 15.6.1 Framework: StoreKitTest Testing Framework: Swift Testing base project: https://developer.apple.com/documentation/StoreKit/implementing-a-store-in-your-app-using-the-storekit-api Expected Behavior After calling session.setSimulatedError(.generic(.notAvailableInStorefront), forAPI: .loadProducts), the subsequent call to Product.products(for:) should throw StoreKitError.notAvailableInStorefront. Actual Behavior The error is not thrown. Products load successfully as if setSimulatedError() was never called. Steps to Reproduce Create an SKTestSession with a StoreKit configuration file Call session.setSimulatedError(.generic(.notAvailableInStorefront), forAPI: .loadProducts) Call Product.products(for:) with a valid product ID Observe that no error is thrown and the product loads successfully Sample Code import StoreKitTest import Testing struct SKDemoTests { let productID: String = "plus.standard" @Test func testSimulatedErrorForLoadProducts() async throws { let storeKitConfigURL = try Self.getStoreKitConfigurationURL() let session = try SKTestSession(contentsOf: storeKitConfigURL) try await session.setSimulatedError( .generic(.notAvailableInStorefront), forAPI: .loadProducts ) try await confirmation("StoreKitError throw") { throwStoreKitError in do { _ = try await Self.execute(productID: productID) } catch let error as StoreKitError { guard case StoreKitError.notAvailableInStorefront = error else { throw error } throwStoreKitError() } catch { Issue.record( "Expect StoreKitError. Error: \(error.localizedDescription)" ) } } #expect(session.allTransactions().isEmpty) } static func execute(productID: String) async throws { guard let product = try await Product.products(for: [productID]).first( where: { $0.id == productID }) else { throw NSError( domain: "SKDemoTests", code: 404, userInfo: [NSLocalizedDescriptionKey: "Product not found for ID: \(productID)"] ) } _ = product } static func getStoreKitConfigurationURL() throws -> URL { guard let bundle = Bundle(identifier: "your.bundle.identifier"), let url = bundle.url(forResource: "Products", withExtension: "storekit") else { fatalError("StoreKit configuration not found") } return url } } Test Result The test fails because the expected StoreKitError.notAvailableInStorefront is never thrown. Question Is this a known issue in iOS 26.2 / Xcode 26.2 beta 2, or is there a different approach required for simulating errors with SKTestSession in this version? Any guidance would be appreciated. Feedback Assistant report: FB21110809