diff --git a/samples/ChatSample/Program.cs b/samples/ChatSample/Program.cs
index f6c7a1102c..757fbb32cd 100644
--- a/samples/ChatSample/Program.cs
+++ b/samples/ChatSample/Program.cs
@@ -12,6 +12,7 @@ namespace ChatSample
         public static void Main(string[] args)
         {
             var host = new WebHostBuilder()
+                .UseSetting(WebHostDefaults.PreventHostingStartupKey, "true")
                 .ConfigureLogging((context, factory) =>
                 {
                     factory.UseConfiguration(context.Configuration.GetSection("Logging"));
diff --git a/samples/SocialWeather/Program.cs b/samples/SocialWeather/Program.cs
index d25c80a04c..426f89226b 100644
--- a/samples/SocialWeather/Program.cs
+++ b/samples/SocialWeather/Program.cs
@@ -12,6 +12,7 @@ namespace SocialWeather
         public static void Main(string[] args)
         {
             var host = new WebHostBuilder()
+                .UseSetting(WebHostDefaults.PreventHostingStartupKey, "true")
                 .ConfigureLogging(factory =>
                 {
                     factory.AddConsole();
diff --git a/samples/SocketsSample/Program.cs b/samples/SocketsSample/Program.cs
index 5f2bafdbc4..aa6c67a8fe 100644
--- a/samples/SocketsSample/Program.cs
+++ b/samples/SocketsSample/Program.cs
@@ -18,6 +18,7 @@ namespace SocketsSample
 
             var host = new WebHostBuilder()
                 .UseConfiguration(config)
+                .UseSetting(WebHostDefaults.PreventHostingStartupKey, "true")
                 .ConfigureLogging(factory =>
                 {
                     factory.AddConsole();