diff --git a/packages/flutter_tools/lib/src/android/android_device_discovery.dart b/packages/flutter_tools/lib/src/android/android_device_discovery.dart
index 4d51fada13..4f1322936b 100644
--- a/packages/flutter_tools/lib/src/android/android_device_discovery.dart
+++ b/packages/flutter_tools/lib/src/android/android_device_discovery.dart
@@ -17,27 +17,35 @@ import 'adb.dart';
 import 'android_device.dart';
 import 'android_sdk.dart';
 import 'android_workflow.dart' hide androidWorkflow;
-import 'android_workflow.dart' as workflow show androidWorkflow;
 
 /// Device discovery for Android physical devices and emulators.s
 class AndroidDevices extends PollingDeviceDiscovery {
-  // TODO(jonahwilliams): make these required after google3 is updated.
   AndroidDevices({
-    AndroidWorkflow androidWorkflow,
-    ProcessManager processManager,
-    Logger logger,
-    AndroidSdk androidSdk,
-  }) : _androidWorkflow = androidWorkflow ?? workflow.androidWorkflow,
-       _androidSdk = androidSdk ?? globals.androidSdk,
+    @required AndroidWorkflow androidWorkflow,
+    @required ProcessManager processManager,
+    @required Logger logger,
+    @required AndroidSdk androidSdk,
+    FileSystem fileSystem, // TODO(jonahwilliams): remove after rolling into google3
+    Platform platform,
+  }) : _androidWorkflow = androidWorkflow,
+       _androidSdk = androidSdk,
        _processUtils = ProcessUtils(
-         logger: logger ?? globals.logger,
-         processManager: processManager ?? globals.processManager,
+         logger: logger,
+         processManager: processManager,
         ),
+        _processManager = processManager,
+        _logger = logger,
+        _fileSystem = fileSystem ?? globals.fs,
+        _platform = platform ?? globals.platform,
        super('Android devices');
 
   final AndroidWorkflow _androidWorkflow;
   final ProcessUtils _processUtils;
   final AndroidSdk _androidSdk;
+  final ProcessManager _processManager;
+  final Logger _logger;
+  final FileSystem _fileSystem;
+  final Platform _platform;
 
   @override
   bool get supportsPlatform => _androidWorkflow.appliesToHostPlatform;
@@ -69,6 +77,11 @@ class AndroidDevices extends PollingDeviceDiscovery {
       text,
       devices: devices,
       timeoutConfiguration: timeoutConfiguration,
+      processManager: _processManager,
+      logger: _logger,
+      fileSystem: _fileSystem,
+      androidSdk: _androidSdk,
+      platform: _platform,
     );
     return devices;
   }
@@ -90,6 +103,11 @@ class AndroidDevices extends PollingDeviceDiscovery {
         text,
         diagnostics: diagnostics,
         timeoutConfiguration: timeoutConfiguration,
+        processManager: _processManager,
+        logger: _logger,
+        fileSystem: _fileSystem,
+        androidSdk: _androidSdk,
+        platform: _platform,
       );
       return diagnostics;
     }
@@ -106,11 +124,11 @@ class AndroidDevices extends PollingDeviceDiscovery {
     String text, {
     List<AndroidDevice> devices,
     List<String> diagnostics,
-    AndroidSdk androidSdk,
-    FileSystem fileSystem,
-    Logger logger,
-    Platform platform,
-    ProcessManager processManager,
+    @required AndroidSdk androidSdk,
+    @required FileSystem fileSystem,
+    @required Logger logger,
+    @required Platform platform,
+    @required ProcessManager processManager,
     @required TimeoutConfiguration timeoutConfiguration,
   }) {
     // Check for error messages from adb
@@ -170,11 +188,11 @@ class AndroidDevices extends PollingDeviceDiscovery {
             productID: info['product'],
             modelID: info['model'] ?? deviceID,
             deviceCodeName: info['device'],
-            androidSdk: androidSdk ?? globals.androidSdk,
-            fileSystem: fileSystem ?? globals.fs,
-            logger: logger ?? globals.logger,
-            platform: platform ?? globals.platform,
-            processManager: processManager ?? globals.processManager,
+            androidSdk: androidSdk,
+            fileSystem: fileSystem,
+            logger: logger,
+            platform: platform,
+            processManager: processManager,
             timeoutConfiguration: timeoutConfiguration,
           ));
         }
diff --git a/packages/flutter_tools/lib/src/ios/devices.dart b/packages/flutter_tools/lib/src/ios/devices.dart
index 71932dc2a3..564174e79e 100644
--- a/packages/flutter_tools/lib/src/ios/devices.dart
+++ b/packages/flutter_tools/lib/src/ios/devices.dart
@@ -31,16 +31,15 @@ import 'iproxy.dart';
 import 'mac.dart';
 
 class IOSDevices extends PollingDeviceDiscovery {
-  // TODO(fujino): make these required and remove fallbacks once internal invocations migrated
   IOSDevices({
-    Platform platform,
-    XCDevice xcdevice,
-    IOSWorkflow iosWorkflow,
-    Logger logger,
-  }) : _platform = platform ?? globals.platform,
-       _xcdevice = xcdevice ?? globals.xcdevice,
-       _iosWorkflow = iosWorkflow ?? globals.iosWorkflow,
-       _logger = logger ?? globals.logger,
+    @required Platform platform,
+    @required XCDevice xcdevice,
+    @required IOSWorkflow iosWorkflow,
+    @required Logger logger,
+  }) : _platform = platform,
+       _xcdevice = xcdevice,
+       _iosWorkflow = iosWorkflow,
+       _logger = logger,
        super('iOS devices');
 
   final Platform _platform;
diff --git a/packages/flutter_tools/lib/src/tester/flutter_tester.dart b/packages/flutter_tools/lib/src/tester/flutter_tester.dart
index 896f3e0d7e..ff38ddc5ae 100644
--- a/packages/flutter_tools/lib/src/tester/flutter_tester.dart
+++ b/packages/flutter_tools/lib/src/tester/flutter_tester.dart
@@ -17,7 +17,6 @@ import '../build_info.dart';
 import '../bundle.dart';
 import '../convert.dart';
 import '../device.dart';
-import '../globals.dart' as globals;
 import '../project.dart';
 import '../protocol_discovery.dart';
 import '../version.dart';
@@ -48,18 +47,18 @@ class FlutterTesterApp extends ApplicationPackage {
 // TODO(scheglov): This device does not currently work with full restarts.
 class FlutterTesterDevice extends Device {
   FlutterTesterDevice(String deviceId, {
-    ProcessManager processManager,
-    FlutterVersion flutterVersion,
-    Logger logger,
-    String buildDirectory,
-    FileSystem fileSystem,
-    Artifacts artifacts,
-  }) : _processManager = processManager ?? globals.processManager, // TODO(jonahwilliams): remove after google3 roll.
-       _flutterVersion = flutterVersion ?? globals.flutterVersion,
-       _logger = logger ?? globals.logger,
-       _buildDirectory = buildDirectory ?? getBuildDirectory(),
-       _fileSystem = fileSystem ?? globals.fs,
-       _artifacts = artifacts ?? globals.artifacts,
+    @required ProcessManager processManager,
+    @required FlutterVersion flutterVersion,
+    @required Logger logger,
+    @required String buildDirectory,
+    @required FileSystem fileSystem,
+    @required Artifacts artifacts,
+  }) : _processManager = processManager,
+       _flutterVersion = flutterVersion,
+       _logger = logger,
+       _buildDirectory = buildDirectory,
+       _fileSystem = fileSystem,
+       _artifacts = artifacts,
        super(
         deviceId,
         platformType: null,
@@ -255,20 +254,20 @@ class FlutterTesterDevice extends Device {
 
 class FlutterTesterDevices extends PollingDeviceDiscovery {
   FlutterTesterDevices({
-    FileSystem fileSystem,
-    Artifacts artifacts,
-    ProcessManager processManager,
-    Logger logger,
-    FlutterVersion flutterVersion,
-    Config config,
-  }) : _testerDevice = FlutterTesterDevice( // TODO(jonahwilliams): remove after google3 roll.
+    @required FileSystem fileSystem,
+    @required Artifacts artifacts,
+    @required ProcessManager processManager,
+    @required Logger logger,
+    @required FlutterVersion flutterVersion,
+    @required Config config,
+  }) : _testerDevice = FlutterTesterDevice(
         kTesterDeviceId,
-        fileSystem: fileSystem ?? globals.fs,
-        artifacts: artifacts ?? globals.artifacts,
-        processManager: processManager ?? globals.processManager,
-        buildDirectory: getBuildDirectory(config ?? globals.config, fileSystem ?? globals.fs),
-        logger: logger ?? globals.logger,
-        flutterVersion: flutterVersion ?? globals.flutterVersion,
+        fileSystem: fileSystem,
+        artifacts: artifacts,
+        processManager: processManager,
+        buildDirectory: getBuildDirectory(config, fileSystem),
+        logger: logger,
+        flutterVersion: flutterVersion,
       ),
        super('Flutter tester');
 
diff --git a/packages/flutter_tools/test/general.shard/android/android_device_discovery_test.dart b/packages/flutter_tools/test/general.shard/android/android_device_discovery_test.dart
index fcc5d46a58..c8861c1ca7 100644
--- a/packages/flutter_tools/test/general.shard/android/android_device_discovery_test.dart
+++ b/packages/flutter_tools/test/general.shard/android/android_device_discovery_test.dart
@@ -26,6 +26,8 @@ void main() {
         featureFlags: TestFeatureFlags(),
       ),
       processManager: FakeProcessManager.list(<FakeCommand>[]),
+      fileSystem: MemoryFileSystem.test(),
+      platform: FakePlatform(),
     );
 
     expect(await androidDevices.pollingGetDevices(), isEmpty);
@@ -48,6 +50,8 @@ void main() {
         featureFlags: TestFeatureFlags(),
       ),
       processManager: processManager,
+      fileSystem: MemoryFileSystem.test(),
+      platform: FakePlatform(),
     );
 
     expect(androidDevices.pollingGetDevices(),
@@ -69,6 +73,8 @@ void main() {
         featureFlags: TestFeatureFlags(),
       ),
       processManager: processManager,
+      fileSystem: MemoryFileSystem.test(),
+      platform: FakePlatform(),
     );
 
     expect(androidDevices.pollingGetDevices(),
@@ -86,6 +92,8 @@ void main() {
         ),
       ),
       processManager: FakeProcessManager.any(),
+      fileSystem: MemoryFileSystem.test(),
+      platform: FakePlatform(),
     );
 
     expect(androidDevices.supportsPlatform, false);
@@ -163,6 +171,11 @@ Use the 'android' tool to install them:
 ''', devices: devices,
      diagnostics: diagnostics,
      timeoutConfiguration: const TimeoutConfiguration(),
+     processManager: FakeProcessManager.any(),
+     platform: FakePlatform(),
+     logger: BufferLogger.test(),
+     fileSystem: MemoryFileSystem.test(),
+     androidSdk: MockAndroidSdk(),
     );
 
     expect(devices, isEmpty);