anchor.diff:    await compileTests(flutterDir, flutterPlatformDir, new StdoutLogger());
   }
   
  -Future<NnbdMode> _getNNBDMode(Uri script, Uri packagesFileUri) async {
  +Future<NnbdMode> _getNNBDMode(Uri script, Uri packageConfigUri) async {
     final CompilerOptions compilerOptions = new CompilerOptions()
       ..sdkRoot = null
       ..fileSystem = StandardFileSystem.instance
  -    ..packagesFileUri = packagesFileUri
  +    ..packagesFileUri = packageConfigUri
       ..sdkSummary = null
       ..nnbdMode = NnbdMode.Weak;
   
  
positive.code:           systemTempDir,
            chunk,
            flutterPlatformDirectory,
            queueEntry.dotPackage,
            queueEntry.testDir,
            flutterDirectory,
            logger,
  
negative.code: 
  class _QueueEntry {
    final List<File> files;
    final File packageConfig;
    final Directory testDir;
  
    _QueueEntry(this.files, this.packageConfig, this.testDir);
  }
  
  Future<void> _processFiles(
      Directory systemTempDir,
      List<File> files,
      Directory flutterPlatformDirectory,
      File packageConfig,
      Directory testDir,
      Directory flutterDirectory,
      Logger logger,
  