diff --git a/src/Analyzers/CSharp/CodeFixes/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationCodeFixProvider.cs b/src/Analyzers/CSharp/CodeFixes/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationCodeFixProvider.cs
index 2f223094e2daf219dfff2ef0e417995417dea6ce..b906cf9fee13e2a1351fc0cef113ea1f0f655a98 100644
--- a/src/Analyzers/CSharp/CodeFixes/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationCodeFixProvider.cs
+++ b/src/Analyzers/CSharp/CodeFixes/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationCodeFixProvider.cs
@@ -15,6 +15,7 @@
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.Editing;
+using Microsoft.CodeAnalysis.Host.Mef;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Roslyn.Utilities;
 
@@ -24,7 +25,7 @@ namespace Microsoft.CodeAnalysis.CSharp.UseImplicitObjectCreation
     internal class CSharpUseImplicitObjectCreationCodeFixProvider : SyntaxEditorBasedCodeFixProvider
     {
         [ImportingConstructor]
-        [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be [Obsolete]", Justification = "Used in test code: https://github.com/dotnet/roslyn/issues/42814")]
+        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
         public CSharpUseImplicitObjectCreationCodeFixProvider()
         {
         }
diff --git a/src/Analyzers/CSharp/Tests/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationTests.cs b/src/Analyzers/CSharp/Tests/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationTests.cs
index 4cc1a1e0f191a42ba4a86eb6e5a83f49a84fd707..2c002e49c3e5f9602d843d317bf8ef8250835f46 100644
--- a/src/Analyzers/CSharp/Tests/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationTests.cs
+++ b/src/Analyzers/CSharp/Tests/UseImplicitObjectCreation/CSharpUseImplicitObjectCreationTests.cs
@@ -512,6 +512,28 @@ class C
                 FixedCode = @"
 using System.Collections.Generic;
 class C
+{
+    System.Collections.Generic.List<int> list = new();
+}",
+                LanguageVersion = CodeAnalysis.CSharp.LanguageVersion.CSharp9,
+            }.RunAsync();
+        }
+
+        [Fact, Trait(Traits.Feature, Traits.Features.CodeActionsUseImplicitObjectCreation)]
+        public async Task TestAlias()
+        {
+            await new VerifyCS.Test
+            {
+                TestCode = @"
+using System.Collections.Generic;
+using X = System.Collections.Generic.List<int>;
+class C
+{
+    System.Collections.Generic.List<int> list = new [|X|]();
+}",
+                FixedCode = @"
+using System.Collections.Generic;
+class C
 {
     System.Collections.Generic.List<int> list = new();
 }",