1 files changed, 4 insertions, 1 deletions

diff --git a/src/WixToolset.Core.TestPackage/TestMessageListener.cs b/src/WixToolset.Core.TestPackage/TestMessageListener.cs
index 246cddd8..b5863869 100644
--- a/src/WixToolset.Core.TestPackage/TestMessageListener.cs
+++ b/src/WixToolset.Core.TestPackage/TestMessageListener.cs
@@ -1,6 +1,7 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using WixToolset.Data;
 using WixToolset.Extensibility;
+using WixToolset.Extensibility.Services;
 
 namespace WixToolset.Core.TestPackage
 {
@@ -21,5 +22,7 @@ namespace WixToolset.Core.TestPackage
         {
             this.Messages.Add(new Message(null, MessageLevel.Information, 0, message));
         }
+
+        public MessageLevel CalculateMessageLevel(IMessaging messaging, Message message, MessageLevel defaultMessageLevel) => defaultMessageLevel;
     }
 }