diff --git a/test/Polly.Specs/Helpers/Bulkhead/AnnotatedOutputHelper.cs b/test/Polly.Specs/Helpers/Bulkhead/AnnotatedOutputHelper.cs
index c6b47575084..4392069181e 100644
--- a/test/Polly.Specs/Helpers/Bulkhead/AnnotatedOutputHelper.cs
+++ b/test/Polly.Specs/Helpers/Bulkhead/AnnotatedOutputHelper.cs
@@ -1,4 +1,6 @@
-namespace Polly.Specs.Helpers.Bulkhead;
+using System.Globalization;
+
+namespace Polly.Specs.Helpers.Bulkhead;
 
 public class AnnotatedOutputHelper : ITestOutputHelper
 {
@@ -36,7 +38,7 @@ public void Flush()
         var toOutput = _items.Select(kvp => kvp.Value).OrderBy(i => i.Position).Reverse();
         foreach (var item in toOutput)
         {
-            _innerOutputHelper.WriteLine(item.TimeStamp.ToString("o") + ": " + item.Format, item.Args);
+            _innerOutputHelper.WriteLine(item.TimeStamp.ToString("o", CultureInfo.InvariantCulture) + ": " + item.Format, item.Args);
         }
 
         _items.Clear();
diff --git a/test/Polly.Specs/Polly.Specs.csproj b/test/Polly.Specs/Polly.Specs.csproj
index e5ff54a71c1..a511407c4f2 100644
--- a/test/Polly.Specs/Polly.Specs.csproj
+++ b/test/Polly.Specs/Polly.Specs.csproj
@@ -9,7 +9,7 @@
     <Include>[Polly]*</Include>
     <IncludePollyUsings>true</IncludePollyUsings>
     <NoWarn>$(NoWarn);S103;S104;IDE0011;SA1600;SA1204;CA2008;CA1806;CA2201;</NoWarn>
-    <NoWarn>$(NoWarn);S3878;CA1030;S3717;SA1129;S1402;SA1649;SA1402;S4056;CA1031</NoWarn>
+    <NoWarn>$(NoWarn);S3878;CA1030;S3717;SA1129;S1402;SA1649;SA1402;CA1031</NoWarn>
     <NoWarn>$(NoWarn);S2184;</NoWarn>
   </PropertyGroup>