diff --git a/ServiceScan.SourceGenerator.Tests/CustomHandlerTests.cs b/ServiceScan.SourceGenerator.Tests/CustomHandlerTests.cs
index 0953565..54e1aa0 100644
--- a/ServiceScan.SourceGenerator.Tests/CustomHandlerTests.cs
+++ b/ServiceScan.SourceGenerator.Tests/CustomHandlerTests.cs
@@ -148,7 +148,7 @@ namespace GeneratorTests;
 
             public static partial class ServicesExtensions
             {
-                public static partial GeneratorTests.IServices ProcessServices(this GeneratorTests.IServices services)
+                public static partial global::GeneratorTests.IServices ProcessServices(this global::GeneratorTests.IServices services)
                 {
                     HandleType<global::GeneratorTests.MyService1>(services);
                     HandleType<global::GeneratorTests.MyService2>(services);
diff --git a/ServiceScan.SourceGenerator/Model/MethodModel.cs b/ServiceScan.SourceGenerator/Model/MethodModel.cs
index 64c246e..a906494 100644
--- a/ServiceScan.SourceGenerator/Model/MethodModel.cs
+++ b/ServiceScan.SourceGenerator/Model/MethodModel.cs
@@ -22,7 +22,8 @@ record MethodModel(
 
     public static MethodModel Create(IMethodSymbol method, SyntaxNode syntax)
     {
-        EquatableArray<ParameterModel> parameters = [.. method.Parameters.Select(p => new ParameterModel(p.Type.ToDisplayString(), p.Name))];
+        EquatableArray<ParameterModel> parameters = [.. method.Parameters
+            .Select(p => new ParameterModel(p.Type.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat), p.Name))];
 
         var typeSyntax = syntax.FirstAncestorOrSelf<TypeDeclarationSyntax>();
 
@@ -36,7 +37,7 @@ public static MethodModel Create(IMethodSymbol method, SyntaxNode syntax)
             Parameters: parameters,
             IsExtensionMethod: method.IsExtensionMethod,
             ReturnsVoid: method.ReturnsVoid,
-            ReturnType: method.ReturnType.ToDisplayString());
+            ReturnType: method.ReturnType.ToDisplayString(SymbolDisplayFormat.FullyQualifiedFormat));
     }
 
     private static string GetModifiers(SyntaxNode syntax)