diff --git a/tests/NATS.Extensions.Microsoft.DependencyInjection.Tests/NatsHostingExtensionsTests.cs b/tests/NATS.Extensions.Microsoft.DependencyInjection.Tests/NatsHostingExtensionsTests.cs
index 5e3095d2..8668f48e 100644
--- a/tests/NATS.Extensions.Microsoft.DependencyInjection.Tests/NatsHostingExtensionsTests.cs
+++ b/tests/NATS.Extensions.Microsoft.DependencyInjection.Tests/NatsHostingExtensionsTests.cs
@@ -187,7 +187,9 @@ public async Task AddNatsClient_WithJsonSerializer()
         services.AddNatsClient(nats =>
         {
             nats.ConfigureOptions(opts => server.ClientOpts(opts));
+#pragma warning disable CS0618 // Type or member is obsolete
             nats.AddJsonSerialization(MyJsonContext.Default);
+#pragma warning restore CS0618 // Type or member is obsolete
         });
 
         var provider = services.BuildServiceProvider();
diff --git a/version.txt b/version.txt
index 35d16fb1..1ac43dbb 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2.5.7
+2.5.8-preview.1