--- a/src/Microsoft.PowerShell.ConsoleHost/host/msh/UpdatesNotification.cs
+++ b/src/Microsoft.PowerShell.ConsoleHost/host/msh/UpdatesNotification.cs
@@ -395,7 +395,7 @@ namespace Microsoft.PowerShell
             string str = Environment.GetEnvironmentVariable(UpdateCheckEnvVar);
             if (string.IsNullOrEmpty(str))
             {
-                return NotificationType.Default;
+                return NotificationType.Off;
             }
 
             if (Enum.TryParse(str, ignoreCase: true, out NotificationType type))