diff --git a/test/Microsoft.AspNet.Server.WebListener.Test/Properties/AssemblyInfo.cs b/test/Microsoft.AspNet.Server.WebListener.Test/Properties/AssemblyInfo.cs
index 486c5d20cd..c596cb6438 100644
--- a/test/Microsoft.AspNet.Server.WebListener.Test/Properties/AssemblyInfo.cs
+++ b/test/Microsoft.AspNet.Server.WebListener.Test/Properties/AssemblyInfo.cs
@@ -40,3 +40,6 @@ using System.Runtime.InteropServices;
 // [assembly: AssemblyVersion("0.5")]
 [assembly: AssemblyVersion("0.5")]
 [assembly: AssemblyFileVersion("0.5.40117.0")]
+
+// These tests can't run in parallel because they all use the same port.
+[assembly: Xunit.CollectionBehaviorAttribute(Xunit.CollectionBehavior.CollectionPerAssembly, DisableTestParallelization = true)]
diff --git a/test/Microsoft.AspNet.Server.WebListener.Test/Utilities.cs b/test/Microsoft.AspNet.Server.WebListener.Test/Utilities.cs
index adacfdf832..eba2edfd9e 100644
--- a/test/Microsoft.AspNet.Server.WebListener.Test/Utilities.cs
+++ b/test/Microsoft.AspNet.Server.WebListener.Test/Utilities.cs
@@ -4,9 +4,6 @@ using System.Threading.Tasks;
 using Microsoft.AspNet.Abstractions;
 using Microsoft.AspNet.Hosting.Server;
 
-// These tests can't run in parallel because they all use the same port.
-[assembly: Xunit.CollectionBehaviorAttribute(Xunit.CollectionBehavior.CollectionPerAssembly, DisableTestParallelization = true)]
-
 namespace Microsoft.AspNet.Server.WebListener.Test
 {
     using AppFunc = Func<object, Task>;