diff --git a/Sources/SnapshotTestCase/Snapshot.swift b/Sources/SnapshotTestCase/Snapshot.swift
index 9b951c2..44c3263 100644
--- a/Sources/SnapshotTestCase/Snapshot.swift
+++ b/Sources/SnapshotTestCase/Snapshot.swift
@@ -13,6 +13,8 @@ public class Snapshot {
         let filePath: URL
         let name: String
         let renderDelay: TimeInterval
+        let preAppear: @MainActor () async throws -> Void
+        let postAppear: @MainActor () async throws -> Void
         let viewControllerBuilder: @MainActor () -> UIViewController
     }
 
@@ -231,7 +233,7 @@ private extension Snapshot.TestCase {
     @MainActor
     private func takeSnapshot(with config: SnapshotConfig.Config) async throws -> UIImage {
         let size = config.size + CGSize(width: 0, height: Snapshot.renderOffsetY)
-        let (viewController, view) = try create(with: config, in: size)
+        let (viewController, view) = try await  create(with: config, in: size)
         var snapshot = try await SnapshotWindow.shared.new()
             .frame(CGRect(origin: .zero, size: size))
             .rootViewController(viewController)
@@ -249,6 +251,7 @@ private extension Snapshot.TestCase {
         }
 
         try await Task.sleep(for: .seconds(renderDelay))
+        try await postAppear()
         view.layer.render(in: context)
 
         let image = UIGraphicsGetImageFromCurrentImageContext()
@@ -280,7 +283,8 @@ private extension Snapshot.TestCase {
     private func create(
         with config: SnapshotConfig.Config,
         in size: CGSize
-    ) throws -> (UIViewController, UIView) {
+    ) async throws -> (UIViewController, UIView) {
+        try await preAppear()
         let viewController = viewControllerBuilder().interfaceStyle(config.interfaceStyle)
         viewController.beginAppearanceTransition(true, animated: false)
         viewController.endAppearanceTransition()
diff --git a/Sources/SnapshotTestCase/SnapshotTestCase.swift b/Sources/SnapshotTestCase/SnapshotTestCase.swift
index 9ce332d..a8a28f7 100644
--- a/Sources/SnapshotTestCase/SnapshotTestCase.swift
+++ b/Sources/SnapshotTestCase/SnapshotTestCase.swift
@@ -13,6 +13,8 @@ public extension SnapshotTestCase {
         renderDelay: TimeInterval = .snapshotRenderDelay,
         file: String = #file,
         function: String = #function,
+        preAppear: @MainActor @escaping () async throws -> Void = { },
+        postAppear: @MainActor @escaping () async throws -> Void = { },
         viewBuilder: @escaping @MainActor () -> some View
     ) async throws {
         try await verifySnapshot(
@@ -21,6 +23,8 @@ public extension SnapshotTestCase {
             renderDelay: renderDelay,
             file: file,
             function: function,
+            preAppear: preAppear,
+            postAppear: postAppear,
             viewControllerBuilder: { UIHostingController(rootView: viewBuilder()) }
         )
     }
@@ -31,12 +35,16 @@ public extension SnapshotTestCase {
         renderDelay: TimeInterval = .snapshotRenderDelay,
         file: String = #file,
         function: String = #function,
+        preAppear: @MainActor @escaping () async throws -> Void = { },
+        postAppear: @MainActor @escaping () async throws -> Void = { },
         viewControllerBuilder: @escaping @MainActor () -> some UIViewController
     ) async throws {
         let testCase = Snapshot.TestCase(
             filePath: getFilePath(file: file),
             name: name ?? getTestCaseName(file: file, function: function) ?? "Test",
             renderDelay: renderDelay,
+            preAppear: preAppear,
+            postAppear: postAppear,
             viewControllerBuilder: viewControllerBuilder
         )
         try await snapshot.verify(testCase: testCase, with: config)