diff --git a/src/Adapter/MSTest.TestAdapter/TestingPlatformAdapter/MSTestBridgedTestFramework.cs b/src/Adapter/MSTest.TestAdapter/TestingPlatformAdapter/MSTestBridgedTestFramework.cs
index 4fb87cc30e..e175c89ce1 100644
--- a/src/Adapter/MSTest.TestAdapter/TestingPlatformAdapter/MSTestBridgedTestFramework.cs
+++ b/src/Adapter/MSTest.TestAdapter/TestingPlatformAdapter/MSTestBridgedTestFramework.cs
@@ -19,6 +19,7 @@
 namespace Microsoft.VisualStudio.TestTools.UnitTesting;
 
 [SuppressMessage("ApiDesign", "RS0030:Do not use banned APIs", Justification = "We can use MTP from this folder")]
+[StackTraceHidden]
 internal sealed class MSTestBridgedTestFramework : SynchronizedSingleSessionVSTestBridgedTestFramework
 {
     private readonly BridgedConfiguration? _configuration;
diff --git a/src/Adapter/MSTest.TestAdapter/VSTestAdapter/MSTestExecutor.cs b/src/Adapter/MSTest.TestAdapter/VSTestAdapter/MSTestExecutor.cs
index f85044c5f8..cc872a0d9e 100644
--- a/src/Adapter/MSTest.TestAdapter/VSTestAdapter/MSTestExecutor.cs
+++ b/src/Adapter/MSTest.TestAdapter/VSTestAdapter/MSTestExecutor.cs
@@ -17,6 +17,7 @@ namespace Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter;
 /// Contains the execution logic for this adapter.
 /// </summary>
 [ExtensionUri(EngineConstants.ExecutorUriString)]
+[StackTraceHidden]
 internal sealed class MSTestExecutor : ITestExecutor
 {
     private readonly CancellationToken _cancellationToken;
diff --git a/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestExecutionManager.cs b/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestExecutionManager.cs
index 6dbea119b7..74d60443e0 100644
--- a/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestExecutionManager.cs
+++ b/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestExecutionManager.cs
@@ -19,6 +19,7 @@ namespace Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter.Execution;
 /// Class responsible for execution of tests at assembly level and sending tests via framework handle.
 /// </summary>
 #pragma warning disable CA1852 // Seal internal types - This class is inherited in tests.
+[StackTraceHidden]
 internal class TestExecutionManager
 {
     private sealed class RemotingMessageLogger :
diff --git a/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodInfo.cs b/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodInfo.cs
index 4d81c5f61f..165a49355d 100644
--- a/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodInfo.cs
+++ b/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodInfo.cs
@@ -12,6 +12,7 @@ namespace Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter.Execution;
 /// Defines the TestMethod Info object.
 /// </summary>
 #pragma warning disable CA1852 // Seal internal types - This class is inherited in tests.
+[StackTraceHidden]
 internal partial class TestMethodInfo : ITestMethod
 {
     /// <summary>
diff --git a/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodRunner.cs b/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodRunner.cs
index 49965d0f0e..9f96f02485 100644
--- a/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodRunner.cs
+++ b/src/Adapter/MSTestAdapter.PlatformServices/Execution/TestMethodRunner.cs
@@ -17,6 +17,7 @@ namespace Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter.Execution;
 /// <summary>
 /// This class is responsible to running tests and converting framework TestResults to adapter TestResults.
 /// </summary>
+[StackTraceHidden]
 internal sealed class TestMethodRunner
 {
     /// <summary>
diff --git a/src/Adapter/MSTestAdapter.PlatformServices/Execution/UnitTestRunner.cs b/src/Adapter/MSTestAdapter.PlatformServices/Execution/UnitTestRunner.cs
index 27cc6bb8ce..5e391fb043 100644
--- a/src/Adapter/MSTestAdapter.PlatformServices/Execution/UnitTestRunner.cs
+++ b/src/Adapter/MSTestAdapter.PlatformServices/Execution/UnitTestRunner.cs
@@ -20,6 +20,7 @@ namespace Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter.Execution;
 /// <summary>
 /// The runner that runs a single unit test. Also manages the assembly and class cleanup methods at the end of the run.
 /// </summary>
+[StackTraceHidden]
 internal sealed class UnitTestRunner
 #if NETFRAMEWORK
     : MarshalByRefObject
diff --git a/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/SynchronizedSingleSessionVSTestAndTestAnywhereAdapter.cs b/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/SynchronizedSingleSessionVSTestAndTestAnywhereAdapter.cs
index 977788a3d8..cdb5362e76 100644
--- a/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/SynchronizedSingleSessionVSTestAndTestAnywhereAdapter.cs
+++ b/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/SynchronizedSingleSessionVSTestAndTestAnywhereAdapter.cs
@@ -16,6 +16,7 @@ namespace Microsoft.Testing.Extensions.VSTestBridge;
 /// <summary>
 /// A specialized bridged test framework base class that supports a single test session.
 /// </summary>
+[StackTraceHidden]
 public abstract class SynchronizedSingleSessionVSTestBridgedTestFramework : VSTestBridgedTestFrameworkBase, IDisposable
 {
     private readonly IExtension _extension;
diff --git a/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/VSTestBridgedTestFrameworkBase.cs b/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/VSTestBridgedTestFrameworkBase.cs
index 84b1b3c677..bdf7f6f335 100644
--- a/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/VSTestBridgedTestFrameworkBase.cs
+++ b/src/Platform/Microsoft.Testing.Extensions.VSTestBridge/VSTestBridgedTestFrameworkBase.cs
@@ -17,6 +17,7 @@ namespace Microsoft.Testing.Extensions.VSTestBridge;
 /// <summary>
 /// Represents a base class for bridged test frameworks (support of Microsoft.Testing.Platform while supporting VSTest like APIs).
 /// </summary>
+[StackTraceHidden]
 public abstract class VSTestBridgedTestFrameworkBase : ITestFramework, IDataProducer
 {
     private readonly ITrxReportCapability? _trxReportCapability;
diff --git a/src/Platform/Microsoft.Testing.Platform/Hosts/CommonTestHost.cs b/src/Platform/Microsoft.Testing.Platform/Hosts/CommonTestHost.cs
index 8eeac3f0a1..ba69cf06a0 100644
--- a/src/Platform/Microsoft.Testing.Platform/Hosts/CommonTestHost.cs
+++ b/src/Platform/Microsoft.Testing.Platform/Hosts/CommonTestHost.cs
@@ -18,6 +18,7 @@ namespace Microsoft.Testing.Platform.Hosts;
 /// This represents either a test host (console or server), or a test host controller.
 /// This doesn't represent an orchestrator host.
 /// </summary>
+[StackTraceHidden]
 internal abstract class CommonHost(ServiceProvider serviceProvider) : IHost
 {
     public ServiceProvider ServiceProvider => serviceProvider;
diff --git a/src/Platform/Microsoft.Testing.Platform/Hosts/ConsoleTestHost.cs b/src/Platform/Microsoft.Testing.Platform/Hosts/ConsoleTestHost.cs
index 0ff442bd35..83e759a9e9 100644
--- a/src/Platform/Microsoft.Testing.Platform/Hosts/ConsoleTestHost.cs
+++ b/src/Platform/Microsoft.Testing.Platform/Hosts/ConsoleTestHost.cs
@@ -15,6 +15,7 @@
 
 namespace Microsoft.Testing.Platform.Hosts;
 
+[StackTraceHidden]
 internal sealed class ConsoleTestHost(
     ServiceProvider serviceProvider,
     Func<TestFrameworkBuilderData, Task<ITestFramework>> buildTestFrameworkAsync,
diff --git a/src/Platform/Microsoft.Testing.Platform/Hosts/ServerTestHost.cs b/src/Platform/Microsoft.Testing.Platform/Hosts/ServerTestHost.cs
index cce82cc236..fc21a93912 100644
--- a/src/Platform/Microsoft.Testing.Platform/Hosts/ServerTestHost.cs
+++ b/src/Platform/Microsoft.Testing.Platform/Hosts/ServerTestHost.cs
@@ -21,6 +21,7 @@
 
 namespace Microsoft.Testing.Platform.Hosts;
 
+[StackTraceHidden]
 internal sealed partial class ServerTestHost : CommonHost, IServerTestHost, IDisposable, IOutputDeviceDataProducer
 {
     public const string ProtocolVersion = PlatformVersion.Version;
diff --git a/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControlledHost.cs b/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControlledHost.cs
index 8236d770b4..4af00861c1 100644
--- a/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControlledHost.cs
+++ b/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControlledHost.cs
@@ -8,6 +8,7 @@
 namespace Microsoft.Testing.Platform.Hosts;
 
 [UnsupportedOSPlatform("browser")]
+[StackTraceHidden]
 internal sealed class TestHostControlledHost(NamedPipeClient testHostControllerPipeClient, IHost innerHost, CancellationToken cancellationToken) : IHost, IDisposable
 #if NETCOREAPP
 #pragma warning disable SA1001 // Commas should be spaced correctly
diff --git a/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControllersTestHost.cs b/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControllersTestHost.cs
index d2eb6a5fc5..740dcf7c91 100644
--- a/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControllersTestHost.cs
+++ b/src/Platform/Microsoft.Testing.Platform/Hosts/TestHostControllersTestHost.cs
@@ -22,6 +22,7 @@
 namespace Microsoft.Testing.Platform.Hosts;
 
 [UnsupportedOSPlatform("browser")]
+[StackTraceHidden]
 internal sealed class TestHostControllersTestHost : CommonHost, IHost, IDisposable, IOutputDeviceDataProducer
 {
     private readonly TestHostControllerConfiguration _testHostsInformation;