diff --git a/src/Uno.UI/UI/Xaml/Automation/Peers/ThumbAutomationPeer.cs b/src/Uno.UI/UI/Xaml/Automation/Peers/ThumbAutomationPeer.cs
index 6138382023b5..c9acca9969cb 100644
--- a/src/Uno.UI/UI/Xaml/Automation/Peers/ThumbAutomationPeer.cs
+++ b/src/Uno.UI/UI/Xaml/Automation/Peers/ThumbAutomationPeer.cs
@@ -1,26 +1,25 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
-// MUX Reference ThumbAutomationPeer_Partial.cpp
-
+// MUX Reference ThumbAutomationPeer_Partial.cpp, tag winui3/release/1.4.2
 using Microsoft.UI.Xaml.Controls.Primitives;
 
-namespace Microsoft.UI.Xaml.Automation.Peers
+namespace Microsoft.UI.Xaml.Automation.Peers;
+
+/// <summary>
+/// Exposes Thumb types to Microsoft UI Automation.
+/// </summary>
+public partial class ThumbAutomationPeer : FrameworkElementAutomationPeer
 {
 	/// <summary>
-	/// Exposes Thumb types to Microsoft UI Automation.
+	/// Initializes a new instance of the ThumbAutomationPeer class.
 	/// </summary>
-	public partial class ThumbAutomationPeer : FrameworkElementAutomationPeer
+	/// <param name="owner">The Thumb to create a peer for.</param>
+	public ThumbAutomationPeer(Thumb owner) : base(owner)
 	{
-		/// <summary>
-		/// Initializes a new instance of the ThumbAutomationPeer class.
-		/// </summary>
-		/// <param name="owner">The Thumb to create a peer for.</param>
-		public ThumbAutomationPeer(Thumb owner) : base(owner)
-		{
-		}
+	}
 
-		protected override string GetClassNameCore() => nameof(Thumb);
+	protected override string GetClassNameCore() => nameof(Thumb);
 
-		protected override AutomationControlType GetAutomationControlTypeCore() => AutomationControlType.Thumb;
-	}
+	protected override AutomationControlType GetAutomationControlTypeCore()
+		=> AutomationControlType.Thumb;
 }