diff --git a/Tests/OpenSwiftUICoreTests/Layout/Modifier/FrameLayoutTests.swift b/Tests/OpenSwiftUICoreTests/Layout/Modifier/FrameLayoutTests.swift
index 120f963fb..59b35d68a 100644
--- a/Tests/OpenSwiftUICoreTests/Layout/Modifier/FrameLayoutTests.swift
+++ b/Tests/OpenSwiftUICoreTests/Layout/Modifier/FrameLayoutTests.swift
@@ -175,6 +175,10 @@ struct FlexFrameLayoutTests {
             }
         }
         let viewController = PlatformHostingController(rootView: ContentView())
+        #if os(iOS) || os(visionOS)
+        // Measure the frame without the window's safe area.
+        viewController.safeAreaRegions = []
+        #endif
         viewController.triggerLayout()
         let size = viewController.sizeThatFits(in: .zero)
         #expect(size == CGSize(width: 200, height: 200))
diff --git a/Tests/OpenSwiftUICoreTests/View/Graph/ViewGraphTests.swift b/Tests/OpenSwiftUICoreTests/View/Graph/ViewGraphTests.swift
index 490a4965b..51fb48d72 100644
--- a/Tests/OpenSwiftUICoreTests/View/Graph/ViewGraphTests.swift
+++ b/Tests/OpenSwiftUICoreTests/View/Graph/ViewGraphTests.swift
@@ -9,6 +9,7 @@ import OpenSwiftUITestsSupport
 import OpenSwiftUI_SPI
 import Testing
 
+@MainActor
 @Suite(.tags(.aigc))
 struct ViewGraphTests {
     @Test(arguments: [