diff --git a/test/Kestrel.Tests/DotnetTest.cs b/test/Kestrel.Tests/DotnetTest.cs
index cb637d4e8..8bbddd39b 100644
--- a/test/Kestrel.Tests/DotnetTest.cs
+++ b/test/Kestrel.Tests/DotnetTest.cs
@@ -12,6 +12,8 @@ using Xunit;
 using System.Threading.Tasks;
 using FluentAssertions;
 
+[assembly: CollectionBehavior(DisableTestParallelization = true)]
+
 namespace Microsoft.DotNet.Kestrel.Tests
 {
     public class DotnetTest : TestBase