diff --git a/json_serializable/test/src/_json_serializable_test_input.dart b/json_serializable/test/src/_json_serializable_test_input.dart
index 0f792b495..bdd061d00 100644
--- a/json_serializable/test/src/_json_serializable_test_input.dart
+++ b/json_serializable/test/src/_json_serializable_test_input.dart
@@ -84,7 +84,7 @@ class GeneralTestClass1 {
   late DateTime dateOfBirth;
   dynamic dynamicType;
 
-  //ignore: prefer_typing_uninitialized_variables,type_annotate_public_apis,inference_failure_on_uninitialized_variable
+  //ignore: prefer_typing_uninitialized_variables,type_annotate_public_apis,inference_failure_on_uninitialized_variable, strict_top_level_inference
   var varType;
   late List<int> listOfInts;
 }
diff --git a/json_serializable/test/src/to_from_json_test_input.dart b/json_serializable/test/src/to_from_json_test_input.dart
index 21bb81bd7..d352e3027 100644
--- a/json_serializable/test/src/to_from_json_test_input.dart
+++ b/json_serializable/test/src/to_from_json_test_input.dart
@@ -4,6 +4,8 @@
 
 // @dart=3.6
 
+// ignore_for_file: strict_top_level_inference
+
 part of '_json_serializable_test_input.dart';
 
 int _toInt(bool input) => 42;
diff --git a/json_serializable/test/test_sources/test_sources.dart b/json_serializable/test/test_sources/test_sources.dart
index 786931080..80a08aa3b 100644
--- a/json_serializable/test/test_sources/test_sources.dart
+++ b/json_serializable/test/test_sources/test_sources.dart
@@ -44,7 +44,7 @@ class FromJsonOptionalParameters {
 }
 
 class ChildWithFromJson {
-  //ignore: avoid_unused_constructor_parameters
+  //ignore: avoid_unused_constructor_parameters, strict_top_level_inference
   ChildWithFromJson.fromJson(json, {initValue = false});
 }
 
diff --git a/json_serializable/tool/field_matrix_builder.dart b/json_serializable/tool/field_matrix_builder.dart
index 885357c17..32084658b 100644
--- a/json_serializable/tool/field_matrix_builder.dart
+++ b/json_serializable/tool/field_matrix_builder.dart
@@ -10,7 +10,7 @@ import 'package:source_helper/source_helper.dart';
 
 import 'shared.dart';
 
-Builder builder([_]) => _FieldMatrixBuilder();
+Builder builder([BuilderOptions? _]) => _FieldMatrixBuilder();
 
 class _FieldMatrixBuilder extends Builder {
   @override
diff --git a/json_serializable/tool/readme_builder.dart b/json_serializable/tool/readme_builder.dart
index 4daf44ae0..1de8c6398 100644
--- a/json_serializable/tool/readme_builder.dart
+++ b/json_serializable/tool/readme_builder.dart
@@ -13,7 +13,7 @@ import 'package:yaml/yaml.dart';
 import 'test_type_builder.dart';
 import 'test_type_data.dart';
 
-Builder readmeBuilder([_]) => _ReadmeBuilder();
+Builder readmeBuilder([BuilderOptions? _]) => _ReadmeBuilder();
 
 class _ReadmeBuilder extends Builder {
   @override
diff --git a/json_serializable/tool/test_builder.dart b/json_serializable/tool/test_builder.dart
index de50e3dac..8f742241c 100644
--- a/json_serializable/tool/test_builder.dart
+++ b/json_serializable/tool/test_builder.dart
@@ -10,7 +10,8 @@ import 'package:path/path.dart' as p;
 
 import 'shared.dart';
 
-Builder testBuilder([_]) => validate('_test_builder', const _TestBuilder());
+Builder testBuilder([BuilderOptions? _]) =>
+    validate('_test_builder', const _TestBuilder());
 
 class _TestBuilder implements Builder {
   const _TestBuilder();
diff --git a/json_serializable/tool/test_type_builder.dart b/json_serializable/tool/test_type_builder.dart
index 8b25a0815..2c23c8d3a 100644
--- a/json_serializable/tool/test_type_builder.dart
+++ b/json_serializable/tool/test_type_builder.dart
@@ -118,7 +118,8 @@ final _iterableGenericArgs = ([
 const _defaultCollectionExpressions = '42, true, false, null';
 const _altCollectionExpressions = '43, false';
 
-Builder typeBuilder([_]) => validate('_type_builder', const _TypeBuilder());
+Builder typeBuilder([BuilderOptions? _]) =>
+    validate('_type_builder', const _TypeBuilder());
 
 class _TypeBuilder implements Builder {
   const _TypeBuilder();
@@ -147,7 +148,7 @@ class _TypeBuilder implements Builder {
       {'.dart': _allTypes.keys.map(toTypeExtension).toSet().toList()..sort()};
 }
 
-Builder typeTestBuilder([_]) =>
+Builder typeTestBuilder([BuilderOptions? _]) =>
     validate('_type_test_builder', const _TypeTestBuilder());
 
 class _TypeTestBuilder implements Builder {