diff --git a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.cs b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.cs
index 1c2995cf3f43c..db5435b9d86e3 100644
--- a/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.cs
+++ b/src/libraries/System.Runtime.InteropServices/gen/LibraryImportGenerator/LibraryImportGenerator.cs
@@ -274,7 +274,6 @@ private static IncrementalStubGenerationContext CalculateStubInformation(
 
             if (libraryImportData is null)
             {
-                generatorDiagnostics.ReportConfigurationNotSupported(generatedDllImportAttr!, "Invalid syntax");
                 libraryImportData = new LibraryImportData("INVALID_CSHARP_SYNTAX");
             }
 
diff --git a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CompileFails.cs b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CompileFails.cs
index 8bdf007ac8619..6436dd70a20bb 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CompileFails.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CompileFails.cs
@@ -149,9 +149,9 @@ public static IEnumerable<object[]> CodeSnippetsToCompile_InvalidCode()
         {
             yield return new object[] { CodeSnippets.RecursiveImplicitlyBlittableStruct, 0, 1 };
             yield return new object[] { CodeSnippets.MutuallyRecursiveImplicitlyBlittableStruct, 0, 2 };
-            yield return new object[] { CodeSnippets.PartialPropertyName, 1, 2 };
-            yield return new object[] { CodeSnippets.InvalidConstantForModuleName, 1, 1 };
-            yield return new object[] { CodeSnippets.IncorrectAttributeFieldType, 1, 1 };
+            yield return new object[] { CodeSnippets.PartialPropertyName, 0, 2 };
+            yield return new object[] { CodeSnippets.InvalidConstantForModuleName, 0, 1 };
+            yield return new object[] { CodeSnippets.IncorrectAttributeFieldType, 0, 1 };
         }
 
         [Theory]