diff --git a/test/Microsoft.AspNet.Server.KestralTests/EngineTests.cs b/test/Microsoft.AspNet.Server.KestralTests/EngineTests.cs
index 2e821c1af2..1c667ecafb 100644
--- a/test/Microsoft.AspNet.Server.KestralTests/EngineTests.cs
+++ b/test/Microsoft.AspNet.Server.KestralTests/EngineTests.cs
@@ -15,7 +15,7 @@ namespace Microsoft.AspNet.Server.KestralTests
     /// <summary>
     /// Summary description for EngineTests
     /// </summary>
-    public class EngineTests
+    internal class EngineTests
     {
         private async Task App(Frame frame)
         {