diff --git a/src/Controls/tests/Xaml.UnitTests/XmlnsCollision.xaml.cs b/src/Controls/tests/Xaml.UnitTests/XmlnsCollision.xaml.cs
index a5eca7ff50d2..3dfe8d9677c5 100644
--- a/src/Controls/tests/Xaml.UnitTests/XmlnsCollision.xaml.cs
+++ b/src/Controls/tests/Xaml.UnitTests/XmlnsCollision.xaml.cs
@@ -5,9 +5,9 @@
 using NUnit.Framework;
 
 [assembly: XmlnsDefinition("http://companyone.com/schemas/toolkit", "CompanyOne.Controls")]
-[assembly: XmlnsPrefix("c1", "http://companyone.com/schemas/toolkit")]
+[assembly: XmlnsPrefix("http://companyone.com/schemas/toolkit", "c1")]
 [assembly: XmlnsDefinition("http://companytwo.com/schemas/toolkit", "CompanyTwo.Controls")]
-[assembly: XmlnsPrefix("c2", "http://companytwo.com/schemas/toolkit")]
+[assembly: XmlnsPrefix("http://companytwo.com/schemas/toolkit", "c2")]
 [assembly: XmlnsDefinition("http://schemas.microsoft.com/dotnet/maui/global", "http://companyone.com/schemas/toolkit")]
 [assembly: XmlnsDefinition("http://schemas.microsoft.com/dotnet/maui/global", "http://companytwo.com/schemas/toolkit")]