diff --git a/json_serializable/test/supported_types/extra_map_test.dart b/json_serializable/test/supported_types/extra_map_test.dart
index 78a1af821..0bdea277c 100644
--- a/json_serializable/test/supported_types/extra_map_test.dart
+++ b/json_serializable/test/supported_types/extra_map_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.bigint_test.dart b/json_serializable/test/supported_types/type_test.bigint_test.dart
index c012ea507..aa35a7d68 100644
--- a/json_serializable/test/supported_types/type_test.bigint_test.dart
+++ b/json_serializable/test/supported_types/type_test.bigint_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.bool_test.dart b/json_serializable/test/supported_types/type_test.bool_test.dart
index 14e24853b..1d66ca8ce 100644
--- a/json_serializable/test/supported_types/type_test.bool_test.dart
+++ b/json_serializable/test/supported_types/type_test.bool_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.dart b/json_serializable/test/supported_types/type_test.dart
index 625b8e3c4..1a94d75ed 100644
--- a/json_serializable/test/supported_types/type_test.dart
+++ b/json_serializable/test/supported_types/type_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.datetime_test.dart b/json_serializable/test/supported_types/type_test.datetime_test.dart
index 597bbf680..2be225554 100644
--- a/json_serializable/test/supported_types/type_test.datetime_test.dart
+++ b/json_serializable/test/supported_types/type_test.datetime_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.double_test.dart b/json_serializable/test/supported_types/type_test.double_test.dart
index 3e4c05acf..c9db8891a 100644
--- a/json_serializable/test/supported_types/type_test.double_test.dart
+++ b/json_serializable/test/supported_types/type_test.double_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.duration_test.dart b/json_serializable/test/supported_types/type_test.duration_test.dart
index 76816e9fc..c19af16cd 100644
--- a/json_serializable/test/supported_types/type_test.duration_test.dart
+++ b/json_serializable/test/supported_types/type_test.duration_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.enumtype_test.dart b/json_serializable/test/supported_types/type_test.enumtype_test.dart
index 1652b359b..568ddb615 100644
--- a/json_serializable/test/supported_types/type_test.enumtype_test.dart
+++ b/json_serializable/test/supported_types/type_test.enumtype_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.int_test.dart b/json_serializable/test/supported_types/type_test.int_test.dart
index b4252fa5f..9f5a81b1f 100644
--- a/json_serializable/test/supported_types/type_test.int_test.dart
+++ b/json_serializable/test/supported_types/type_test.int_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.iterable_test.dart b/json_serializable/test/supported_types/type_test.iterable_test.dart
index 57b9358b0..658ed97e1 100644
--- a/json_serializable/test/supported_types/type_test.iterable_test.dart
+++ b/json_serializable/test/supported_types/type_test.iterable_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.list_test.dart b/json_serializable/test/supported_types/type_test.list_test.dart
index 342a89079..adbd2ed4a 100644
--- a/json_serializable/test/supported_types/type_test.list_test.dart
+++ b/json_serializable/test/supported_types/type_test.list_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.map_test.dart b/json_serializable/test/supported_types/type_test.map_test.dart
index c8cf4ccb9..e814f7bd2 100644
--- a/json_serializable/test/supported_types/type_test.map_test.dart
+++ b/json_serializable/test/supported_types/type_test.map_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.num_test.dart b/json_serializable/test/supported_types/type_test.num_test.dart
index 52241e719..1ebf28dbe 100644
--- a/json_serializable/test/supported_types/type_test.num_test.dart
+++ b/json_serializable/test/supported_types/type_test.num_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.object_test.dart b/json_serializable/test/supported_types/type_test.object_test.dart
index a4f9601f6..7f8e7f4b6 100644
--- a/json_serializable/test/supported_types/type_test.object_test.dart
+++ b/json_serializable/test/supported_types/type_test.object_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.set_test.dart b/json_serializable/test/supported_types/type_test.set_test.dart
index a3b1ed57b..1a0c0133d 100644
--- a/json_serializable/test/supported_types/type_test.set_test.dart
+++ b/json_serializable/test/supported_types/type_test.set_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.string_test.dart b/json_serializable/test/supported_types/type_test.string_test.dart
index 845762b19..c239eab85 100644
--- a/json_serializable/test/supported_types/type_test.string_test.dart
+++ b/json_serializable/test/supported_types/type_test.string_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';
diff --git a/json_serializable/test/supported_types/type_test.uri_test.dart b/json_serializable/test/supported_types/type_test.uri_test.dart
index ff0710b38..28903704b 100644
--- a/json_serializable/test/supported_types/type_test.uri_test.dart
+++ b/json_serializable/test/supported_types/type_test.uri_test.dart
@@ -3,10 +3,10 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // ignore_for_file: prefer_const_declarations
+@TestOn('vm')
 
 import 'dart:convert';
 
-@TestOn('vm')
 import 'package:test/test.dart';
 
 import '../test_utils.dart';