diff --git a/src/System.Private.ServiceModel/tools/SelfHostedWcfService/Program.cs b/src/System.Private.ServiceModel/tools/SelfHostedWcfService/Program.cs
index a4d9c7bb081..d2429c9e5e8 100644
--- a/src/System.Private.ServiceModel/tools/SelfHostedWcfService/Program.cs
+++ b/src/System.Private.ServiceModel/tools/SelfHostedWcfService/Program.cs
@@ -41,7 +41,7 @@ private static void Main()
             TestDefinitionHelper.StartHosts();
 
             //Start the crlUrl service last as the client use it to ensure all services have been started
-            Uri testHostUrl = new Uri(string.Format("http://localhost/TestHost.svc", s_httpPort));
+            Uri testHostUrl = new Uri(string.Format("http://localhost:{0}/TestHost.svc", s_httpPort));
             WebServiceHost host = new WebServiceHost(typeof(TestHost), testHostUrl);
             WebHttpBinding binding = new WebHttpBinding();
             host.AddServiceEndpoint(typeof(ITestHost), binding, "");