anchor.diff: +@Timeout.factor(4)
  +library peanut_test;
  +
   import 'dart:io';
   
   import 'package:git/git.dart';
  
positive.code:     for (var te in treeContents.where((te) => te.type == 'tree')) {
        await _expectStandardTreeContents(gitDir, te.sha);
      }
    }, timeout: const Timeout.factor(2));
  
    test('2 packages, 2 build dirs', () async {
      const packages = {'pkg1', 'pkg2'};
  
negative.code:     for (var te in pkgContent) {
        await _expectStandardTreeContents(gitDir, te.sha);
      }
    });
  
    group('post build script', () {
      test('valid', () async {
  