diff --git a/tests/Avalonia.Markup.UnitTests/Extensions/IEnummerableExtension.cs b/tests/Avalonia.Markup.UnitTests/Extensions/IEnummerableExtension.cs
index 33be06baed..0d9e2969e1 100644
--- a/tests/Avalonia.Markup.UnitTests/Extensions/IEnummerableExtension.cs
+++ b/tests/Avalonia.Markup.UnitTests/Extensions/IEnummerableExtension.cs
@@ -3,7 +3,7 @@ using System.Collections;
 
 namespace Avalonia.Markup.UnitTests
 {
-    static class IEnummerableExtension
+   internal static class IEnumerableExtensions
     {
         public static object ElementAt(this IEnumerable source, int index)
         {