diff --git a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.DotNet.verified.txt b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.DotNet.verified.txt
index b16d008ad18..68130c8810e 100644
--- a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.DotNet.verified.txt
+++ b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.DotNet.verified.txt
@@ -5642,6 +5642,7 @@ namespace Akka.Util.Internal
     public class static Extensions
     {
         public static System.Collections.Generic.IDictionary<TKey, TValue> AddAndReturn<TKey, TValue>(this System.Collections.Generic.IDictionary<TKey, TValue> hash, TKey key, TValue value) { }
+        [System.ObsoleteAttribute("Use the dictionary setter directly")]
         public static void AddOrSet<TKey, TValue>(this System.Collections.Generic.IDictionary<TKey, TValue> hash, TKey key, TValue value) { }
         public static T AsInstanceOf<T>(this object self) { }
         public static string BetweenDoubleQuotes(this string self) { }
diff --git a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.Net.verified.txt b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.Net.verified.txt
index b1c6cb7b794..f109a52de5c 100644
--- a/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.Net.verified.txt
+++ b/src/core/Akka.API.Tests/verify/CoreAPISpec.ApproveCore.Net.verified.txt
@@ -5631,6 +5631,7 @@ namespace Akka.Util.Internal
     public class static Extensions
     {
         public static System.Collections.Generic.IDictionary<TKey, TValue> AddAndReturn<TKey, TValue>(this System.Collections.Generic.IDictionary<TKey, TValue> hash, TKey key, TValue value) { }
+        [System.ObsoleteAttribute("Use the dictionary setter directly")]
         public static void AddOrSet<TKey, TValue>(this System.Collections.Generic.IDictionary<TKey, TValue> hash, TKey key, TValue value) { }
         public static T AsInstanceOf<T>(this object self) { }
         public static string BetweenDoubleQuotes(this string self) { }