diff --git a/NLog.Owin.Logging.Tests/OwinLoggerTest.cs b/NLog.Owin.Logging.Tests/OwinLoggerTest.cs
index c732c45..f3a4bd1 100644
--- a/NLog.Owin.Logging.Tests/OwinLoggerTest.cs
+++ b/NLog.Owin.Logging.Tests/OwinLoggerTest.cs
@@ -15,7 +15,7 @@ public class OwinLoggerTest : OwinLoggerTestBase
         public void InitConfig()
         {
             // setup the debug target
-            _debugTarget = new DebugTarget { Layout = "${level} ${message}" };
+            _debugTarget = new DebugTarget { Layout = "${level} EventId:${event-properties:item=EventId} ${message}" };
 
             var loggingConfiguration = new LoggingConfiguration();
 
@@ -59,5 +59,15 @@ public void TestUnknownEventType()
         {
             Assert.ThrowsAsync<ArgumentOutOfRangeException> (() => CallRoute("/invalid"));
         }
+
+        [Test]
+        public async Task TestWriteCoreWithEventId()
+        {
+            await CallRoute("/eventid");
+
+            // note: hardcoded event id = 140 in OwinTestApp.cs
+            Assert.That(_debugTarget.LastMessage, Does.StartWith("Info"));
+            Assert.That(_debugTarget.LastMessage, Does.Contain("EventId:140"));
+        }
     }
 }
\ No newline at end of file
diff --git a/NLog.Owin.Logging.Tests/OwinTestApp.cs b/NLog.Owin.Logging.Tests/OwinTestApp.cs
index e5cbf8b..87232d9 100644
--- a/NLog.Owin.Logging.Tests/OwinTestApp.cs
+++ b/NLog.Owin.Logging.Tests/OwinTestApp.cs
@@ -51,6 +51,9 @@ public override async Task Invoke(IOwinContext context)
                 case "/verbose":
                     _logger.WriteVerbose("verbose");
                     break;
+                case "/eventid":
+                    _logger.WriteCore(TraceEventType.Information, 140, "test", null, (message, error) => (string)message);
+                    break;
                 case "/invalid":
                     {
                         //write invalid TraceEventType