anchor.diff:  
   import 'package:test/test.dart' hide TypeMatcher, isInstanceOf;
   import 'package:flutter_driver/flutter_driver.dart';
  +import 'package:path/path.dart' as path;
  +
  +String adbPath() {
  +  final String androidHome = io.Platform.environment['ANDROID_HOME'] ?? io.Platform.environment['ANDROID_SDK_ROOT'];
  +  if (androidHome == null) {
  +    return 'adb';
  +  } else {
  +    return path.join(androidHome, 'platform-tools', 'adb');
  +  }
  +}
   
   void main() {
     group('AccessibilityBridge', () {
  
positive.code:     setUpAll(() async {
        driver = await FlutterDriver.connect();
        // Say the magic words..
        final io.Process run = await io.Process.start('adb', const <String>[
          'shell',
          'settings',
          'put',
  
negative.code: 
      tearDownAll(() async {
        // ... And turn it off again
        final io.Process run = await io.Process.start(adbPath(), const <String>[
          'shell',
          'settings',
          'put',
  