fix tests for 5.0.401

Author: vlada-shubina

global.json

@@ -1,9 +1,9 @@
 {
   "sdk": {
-    "version": "5.0.207"
+    "version": "5.0.401"
   },
   "tools": {
-    "dotnet": "5.0.207",
+    "dotnet": "5.0.401",
     "runtimes": {
       "dotnet/x64": [
         "2.1.30",

src/ProjectTemplates/Shared/TemplatePackageInstaller.cs

@@ -173,9 +173,12 @@ private static async Task VerifyCannotFindTemplateAsync(ITestOutputHelper output
             {
                 var proc = await RunDotNetNew(output, $"\"{templateName}\"");
 
-                if (!proc.Output.Contains("Couldn't find an installed template that matches the input, searching online for one that does..."))
+                if (!proc.Error.Contains($"No templates found matching: '{templateName}'."))
                 {
-                    throw new InvalidOperationException($"Failed to uninstall previous templates. The template '{templateName}' could still be found.");
+                    throw new InvalidOperationException($"Failed to uninstall previous templates. The template '{templateName}' could still be found. " +
+                        $"Process exit code:{proc.ExitCode}" +
+                        $"StdOut:{proc.Output}." +
+                        $"StdErr:{proc.Error}");
                 }
             }
             finally