diff --git a/src/TestFramework/TestFramework.Extensions/PrivateObject.cs b/src/TestFramework/TestFramework.Extensions/PrivateObject.cs
index a379f5118d..3272b3c5d8 100644
--- a/src/TestFramework/TestFramework.Extensions/PrivateObject.cs
+++ b/src/TestFramework/TestFramework.Extensions/PrivateObject.cs
@@ -96,7 +96,7 @@ public PrivateObject(string assemblyName, string typeName, Type[]? parameterType
     public PrivateObject(Type type, params object?[]? args)
         : this(type, null, args)
     {
-        Helper.CheckParameterNotNull(type, "type", string.Empty);
+        Guard.IsNotNull(type, "type", string.Empty);
     }
 
     /// <summary>
@@ -108,7 +108,7 @@ public PrivateObject(Type type, params object?[]? args)
     /// <param name="args">Arguments to pass to the constructor.</param>
     public PrivateObject(Type type, Type[]? parameterTypes, object?[]? args)
     {
-        Helper.CheckParameterNotNull(type, "type", string.Empty);
+        Guard.IsNotNull(type, "type", string.Empty);
         object? o;
         if (parameterTypes != null)
         {
diff --git a/src/TestFramework/TestFramework/Internal/Guard.cs b/src/TestFramework/TestFramework/Internal/Guard.cs
new file mode 100644
index 0000000000..3b41e1f123
--- /dev/null
+++ b/src/TestFramework/TestFramework/Internal/Guard.cs
@@ -0,0 +1,35 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+namespace Microsoft.VisualStudio.TestTools.UnitTesting;
+
+/// <summary>
+/// A guard helper class to help validate preconditions.
+/// </summary>
+internal static class Guard
+{
+    internal static void IsNotNull(object? param, string parameterName, string? message)
+    {
+        if (param is not null)
+        {
+            return;
+        }
+
+        if (message is null)
+        {
+            throw new ArgumentNullException(parameterName);
+        }
+
+        throw new ArgumentNullException(parameterName, message);
+    }
+
+    internal static void IsNotNullOrEmpty(string? argument, string parameterName, string message)
+    {
+        if (StringEx.IsNullOrEmpty(argument))
+        {
+            throw new ArgumentException(message, parameterName);
+        }
+    }
+}
diff --git a/src/TestFramework/TestFramework/Internal/Helper.cs b/src/TestFramework/TestFramework/Internal/Helper.cs
deleted file mode 100644
index 8427a04e2b..0000000000
--- a/src/TestFramework/TestFramework/Internal/Helper.cs
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Licensed under the MIT license. See LICENSE file in the project root for full license information.
-
-using System;
-
-namespace Microsoft.VisualStudio.TestTools.UnitTesting;
-
-/// <summary>
-/// The helper.
-/// </summary>
-internal static class Helper
-{
-    /// <summary>
-    /// The check parameter not null.
-    /// </summary>
-    /// <param name="param">
-    /// The parameter.
-    /// </param>
-    /// <param name="parameterName">
-    /// The parameter name.
-    /// </param>
-    /// <param name="message">
-    /// The message.
-    /// </param>
-    /// <exception cref="ArgumentNullException"> Throws argument null exception when parameter is null. </exception>
-    internal static void CheckParameterNotNull(object param, string parameterName, string message)
-    {
-        _ = param ?? throw new ArgumentNullException(nameof(param));
-    }
-
-    /// <summary>
-    /// The check parameter not null or empty.
-    /// </summary>
-    /// <param name="param">
-    /// The parameter.
-    /// </param>
-    /// <param name="parameterName">
-    /// The parameter name.
-    /// </param>
-    /// <param name="message">
-    /// The message.
-    /// </param>
-    /// <exception cref="ArgumentException"> Throws ArgumentException when parameter is null. </exception>
-    internal static void CheckParameterNotNullOrEmpty(string param, string parameterName, string message)
-    {
-        if (StringEx.IsNullOrEmpty(param))
-        {
-            throw new ArgumentException(message, parameterName);
-        }
-    }
-}