diff --git a/src/Platform/Microsoft.Testing.Platform/Messages/TestNodeProperties.cs b/src/Platform/Microsoft.Testing.Platform/Messages/TestNodeProperties.cs
index 73383ba7d3..38120f4144 100644
--- a/src/Platform/Microsoft.Testing.Platform/Messages/TestNodeProperties.cs
+++ b/src/Platform/Microsoft.Testing.Platform/Messages/TestNodeProperties.cs
@@ -1098,8 +1098,7 @@ public override int GetHashCode()
 /// <summary>
 /// Property that represents standard output to associate with a test node.
 /// </summary>
-[Experimental("TPEXP", UrlFormat = "https://aka.ms/testingplatform/diagnostics#{0}")]
-public class StandardOutputProperty : IProperty, IEquatable<StandardOutputProperty>
+public sealed class StandardOutputProperty : IProperty, IEquatable<StandardOutputProperty>
 {
     /// <summary>
     /// Initializes a new instance of the <see cref="StandardOutputProperty"/> class.
@@ -1141,8 +1140,7 @@ public override int GetHashCode()
 /// <summary>
 /// Property that represents standard error to associate with a test node.
 /// </summary>
-[Experimental("TPEXP", UrlFormat = "https://aka.ms/testingplatform/diagnostics#{0}")]
-public class StandardErrorProperty : IProperty, IEquatable<StandardErrorProperty>
+public sealed class StandardErrorProperty : IProperty, IEquatable<StandardErrorProperty>
 {
     /// <summary>
     /// Initializes a new instance of the <see cref="StandardErrorProperty"/> class.
diff --git a/src/Platform/Microsoft.Testing.Platform/PublicAPI/PublicAPI.Unshipped.txt b/src/Platform/Microsoft.Testing.Platform/PublicAPI/PublicAPI.Unshipped.txt
index 05eaa9f07e..56bf348e93 100644
--- a/src/Platform/Microsoft.Testing.Platform/PublicAPI/PublicAPI.Unshipped.txt
+++ b/src/Platform/Microsoft.Testing.Platform/PublicAPI/PublicAPI.Unshipped.txt
@@ -2,9 +2,37 @@
 *REMOVED*Microsoft.Testing.Platform.Extensions.TestHost.ITestHostApplicationLifetime.AfterRunAsync(int exitCode, System.Threading.CancellationToken cancellation) -> System.Threading.Tasks.Task!
 *REMOVED*Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessLifetimeHandler.OnTestHostProcessExitedAsync(Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessInformation! testHostProcessInformation, System.Threading.CancellationToken cancellation) -> System.Threading.Tasks.Task!
 *REMOVED*Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessLifetimeHandler.OnTestHostProcessStartedAsync(Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessInformation! testHostProcessInformation, System.Threading.CancellationToken cancellation) -> System.Threading.Tasks.Task!
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.Equals(Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty? other) -> bool
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.StandardOutput.get -> string!
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.StandardOutputProperty(string! standardOutput) -> void
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.Equals(Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty? other) -> bool
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.StandardError.get -> string!
+*REMOVED*[TPEXP]Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.StandardErrorProperty(string! standardError) -> void
+*REMOVED*[TPEXP]override Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.Equals(object? obj) -> bool
+*REMOVED*[TPEXP]override Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.GetHashCode() -> int
+*REMOVED*[TPEXP]override Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.ToString() -> string!
+*REMOVED*[TPEXP]override Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.Equals(object? obj) -> bool
+*REMOVED*[TPEXP]override Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.GetHashCode() -> int
+*REMOVED*[TPEXP]override Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.ToString() -> string!
+Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty
+Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.Equals(Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty? other) -> bool
+Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.StandardError.get -> string!
+Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.StandardErrorProperty(string! standardError) -> void
+Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty
+Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.Equals(Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty? other) -> bool
+Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.StandardOutput.get -> string!
+Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.StandardOutputProperty(string! standardOutput) -> void
 Microsoft.Testing.Platform.Extensions.TestHost.ITestHostApplicationLifetime.AfterRunAsync(int exitCode, System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.Task!
 Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessLifetimeHandler.OnTestHostProcessExitedAsync(Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessInformation! testHostProcessInformation, System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.Task!
 Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessLifetimeHandler.OnTestHostProcessStartedAsync(Microsoft.Testing.Platform.Extensions.TestHostControllers.ITestHostProcessInformation! testHostProcessInformation, System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.Task!
+override Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.Equals(object? obj) -> bool
+override Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.GetHashCode() -> int
+override Microsoft.Testing.Platform.Extensions.Messages.StandardErrorProperty.ToString() -> string!
+override Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.Equals(object? obj) -> bool
+override Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.GetHashCode() -> int
+override Microsoft.Testing.Platform.Extensions.Messages.StandardOutputProperty.ToString() -> string!
 [TPEXP]Microsoft.Testing.Platform.Extensions.TestHostOrchestrator.ITestHostExecutionOrchestrator
 [TPEXP]Microsoft.Testing.Platform.Extensions.TestHostOrchestrator.ITestHostExecutionOrchestrator.OrchestrateTestHostExecutionAsync(System.Threading.CancellationToken cancellationToken) -> System.Threading.Tasks.Task<int>!
 Microsoft.Testing.Platform.Builder.ITestApplicationBuilder.TestHostOrchestrator.get -> Microsoft.Testing.Platform.TestHostOrchestrator.ITestHostOrchestratorManager!