anchor.diff:      });
   
       test('works if part and library supplied', () {
  -      var result = Process.runSync('dart', [
  +      var result = Process.runSync(Platform.executable, [
           'bin/dartdevc.dart',
           '--no-summarize',
           '--no-source-map',
  
positive.code: 
      test('compile errors', () {
        badFileDart.writeAsStringSync('main() => "hello world"');
        var result = Process.runSync('dart', [
          'bin/dartdevc.dart',
          '--no-source-map',
          '--dart-sdk-summary',
  
negative.code:     });
  
      test('incorrect usage', () {
        var result = Process.runSync(Platform.executable, [
          'bin/dartdevc.dart',
          '--dart-sdk-summary',
          dartSdkSummary.path,
  