diff --git a/src/contrib/testkits/Akka.TestKit.Xunit2.Tests/Internals/AkkaEqualExceptionSpec.cs b/src/contrib/testkits/Akka.TestKit.Xunit2.Tests/Internals/AkkaEqualExceptionSpec.cs
deleted file mode 100644
index a9f1b4b54ea..00000000000
--- a/src/contrib/testkits/Akka.TestKit.Xunit2.Tests/Internals/AkkaEqualExceptionSpec.cs
+++ /dev/null
@@ -1,33 +0,0 @@
-// -----------------------------------------------------------------------
-//  <copyright file="AkkaEqualException.cs" company="Akka.NET Project">
-//      Copyright (C) 2009-2025 Lightbend Inc. <http://www.lightbend.com>
-//      Copyright (C) 2013-2025 .NET Foundation <https://github.com/akkadotnet/akka.net>
-//  </copyright>
-// -----------------------------------------------------------------------
-
-using Akka.TestKit.Xunit2.Internals;
-using Xunit;
-
-namespace Akka.TestKit.Xunit2.Tests.Internals;
-
-public static class AkkaEqualExceptionSpec
-{
-#if NETFRAMEWORK
-    [Fact]
-    public static void Constructor_deserializes_message()
-    {
-        var originalException = new AkkaEqualException("Test message");
-
-        AkkaEqualException deserializedException;
-        using (var memoryStream = new System.IO.MemoryStream())
-        {
-            var formatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
-            formatter.Serialize(memoryStream, originalException);
-            memoryStream.Seek(0, System.IO.SeekOrigin.Begin);
-            deserializedException = (AkkaEqualException)formatter.Deserialize(memoryStream);
-        }
-
-        Assert.Equal(originalException.Message, deserializedException.Message);
-    }
-#endif
-}
diff --git a/src/contrib/testkits/Akka.TestKit.Xunit2/Internals/AkkaEqualException.cs b/src/contrib/testkits/Akka.TestKit.Xunit2/Internals/AkkaEqualException.cs
index 64a69a22929..6dddda6fc3b 100644
--- a/src/contrib/testkits/Akka.TestKit.Xunit2/Internals/AkkaEqualException.cs
+++ b/src/contrib/testkits/Akka.TestKit.Xunit2/Internals/AkkaEqualException.cs
@@ -6,7 +6,6 @@
 //-----------------------------------------------------------------------
 
 using System;
-using System.Runtime.Serialization;
 using Xunit.Sdk;
 
 #nullable enable
@@ -15,7 +14,6 @@ namespace Akka.TestKit.Xunit2.Internals
     /// <summary>
     /// TBD
     /// </summary>
-    [Serializable]
     public class AkkaEqualException : XunitException
     {
         // Length of "Expected: " and "Actual:   "
@@ -53,14 +51,6 @@ public static AkkaEqualException ForMismatchedValues(
         public AkkaEqualException(string format = "", params object[] args)
             : base(BuildAssertionMessage(format, args)) { }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AkkaEqualException"/> class.
-        /// </summary>
-        /// <param name="info">The <see cref="SerializationInfo"/> that holds the serialized object data about the exception being thrown.</param>
-        /// <param name="context">The <see cref="StreamingContext"/> that contains contextual information about the source or destination.</param>
-        protected AkkaEqualException(SerializationInfo info, StreamingContext context)
-            : base(info.GetString("Message")) { }
-
         /// <summary>
         /// Builds assertion message by applying specified arguments to the format string.
         /// When no arguments are specified, format string is returned as-is.
diff --git a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.DotNet.verified.txt b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.DotNet.verified.txt
index df82f81663c..350493a40c3 100644
--- a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.DotNet.verified.txt
+++ b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.DotNet.verified.txt
@@ -37,7 +37,6 @@ namespace Akka.TestKit.Xunit2.Internals
     public class AkkaEqualException : Xunit.Sdk.XunitException
     {
         public AkkaEqualException(string format = "", params object[] args) { }
-        protected AkkaEqualException(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
         [return: System.Runtime.CompilerServices.NullableAttribute(1)]
         public static Akka.TestKit.Xunit2.Internals.AkkaEqualException ForMismatchedValues(object expected, object actual, string format = null, [System.Runtime.CompilerServices.NullableAttribute(1)] params object[] args) { }
     }
diff --git a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.Net.verified.txt b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.Net.verified.txt
index 881e30f215f..11d9307f3a1 100644
--- a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.Net.verified.txt
+++ b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveTestKitXunit2.Net.verified.txt
@@ -37,7 +37,6 @@ namespace Akka.TestKit.Xunit2.Internals
     public class AkkaEqualException : Xunit.Sdk.XunitException
     {
         public AkkaEqualException(string format = "", params object[] args) { }
-        protected AkkaEqualException(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
         [return: System.Runtime.CompilerServices.NullableAttribute(1)]
         public static Akka.TestKit.Xunit2.Internals.AkkaEqualException ForMismatchedValues(object expected, object actual, string format = null, [System.Runtime.CompilerServices.NullableAttribute(1)] params object[] args) { }
     }