anchor.diff:    }
   
     test_variable_final_late() async {
  -    featureSet = FeatureSet.forTesting(
  -        sdkVersion: '2.2.2', additionalFeatures: [Feature.non_nullable]);
  +    featureSet = enableNnbd;
       var library = await checkLibrary('late final int x = 0;');
       checkElementText(library, r'''
   late final int x;
  
positive.code: /// applied to a class implementing [ResynthesizeTestStrategy], along with the
  /// mixin [ResynthesizeTestHelpers].
  mixin ResynthesizeTestCases implements ResynthesizeTestHelpers {
    test_class_abstract() async {
      var library = await checkLibrary('abstract class C {}');
      checkElementText(library, r'''
  
negative.code:   }
  
    test_variable_late() async {
      featureSet = enableNnbd;
      var library = await checkLibrary('late int x = 0;');
      checkElementText(library, r'''
  late int x;
  