diff --git a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreePageViewModel.cs b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreePageViewModel.cs
index 3416158feeb..1eed2ff00bc 100644
--- a/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreePageViewModel.cs
+++ b/src/Avalonia.Diagnostics/Diagnostics/ViewModels/TreePageViewModel.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using Avalonia.Controls;
 using Avalonia.VisualTree;
 
@@ -206,8 +205,9 @@ private static string GetVisualSelector(Visual visual)
             var classes = string.Concat(visual.Classes
                 .Where(c => !c.StartsWith(":"))
                 .Select(c => '.' + c));
+            var pseudo = string.Concat(visual.Classes.Where(c => c[0] == ':').Select(c => c));
             var type = StyledElement.GetStyleKey(visual);
-            return $$"""{{{type.Assembly.FullName}};{{type.Namespace}}.}{{type.Name}}{{name}}{{classes}}""";
+            return $$"""{{{type.Assembly.FullName}};{{type.Namespace}}|}{{type.Name}}{{name}}{{classes}}{{pseudo}}""";
         }
 
         private void ExpandNode(TreeNode? node)