diff --git a/src/Microsoft.AspNet.Server.Testing/Deployers/ApplicationDeployer.cs b/src/Microsoft.AspNet.Server.Testing/Deployers/ApplicationDeployer.cs
index 27c1ff131c..94c3d4a0c7 100644
--- a/src/Microsoft.AspNet.Server.Testing/Deployers/ApplicationDeployer.cs
+++ b/src/Microsoft.AspNet.Server.Testing/Deployers/ApplicationDeployer.cs
@@ -94,7 +94,7 @@ namespace Microsoft.AspNet.Server.Testing
 
             if (hostProcess.ExitCode != 0)
             {
-                throw new Exception("dnu publish exited with exit code : {0}");
+                throw new Exception(string.Format("dnu publish exited with exit code : {0}", hostProcess.ExitCode));
             }
 
             DeploymentParameters.ApplicationPath =