diff --git a/src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/Components/ComponentDiagnosticFactory.cs b/src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/Components/ComponentDiagnosticFactory.cs
index 6bd15d93e38..984673dbc78 100644
--- a/src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/Components/ComponentDiagnosticFactory.cs
+++ b/src/Compiler/Microsoft.CodeAnalysis.Razor.Compiler/src/Language/Components/ComponentDiagnosticFactory.cs
@@ -25,9 +25,9 @@ public static RazorDiagnostic Create_UnsupportedTagHelperDirective(SourceSpan? s
 
     public static readonly RazorDiagnosticDescriptor CodeBlockInAttribute =
         new($"{DiagnosticPrefix}9979",
-            "Code blocks delimited by '@{{...}}' like '@{{ {0} }}' for attributes are no longer supported. " +
+            "Code blocks delimited by '@{{...}}' like '@{{{0}}}' for attributes are no longer supported. " +
             "These features have been changed to use attribute syntax. " +
-            "Use 'attr=\"@(x => {{... }}\"'.",
+            "Use 'attr=\"@(x => {{...}}\"'.",
             RazorDiagnosticSeverity.Error);
 
     public static RazorDiagnostic Create_CodeBlockInAttribute(SourceSpan? source, string expression)