diff --git a/dev/tools/test/common.dart b/dev/tools/test/common.dart
index 65e64050c3a..ce2398ec954 100644
--- a/dev/tools/test/common.dart
+++ b/dev/tools/test/common.dart
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
 
 import 'package:args/args.dart';
 import 'package:dev_tools/stdio.dart';
diff --git a/dev/tracing_tests/test/image_painting_event_test.dart b/dev/tracing_tests/test/image_painting_event_test.dart
index a70bac80885..f7e27f694e8 100644
--- a/dev/tracing_tests/test/image_painting_event_test.dart
+++ b/dev/tracing_tests/test/image_painting_event_test.dart
@@ -7,6 +7,7 @@ import 'dart:convert' show jsonEncode;
 import 'dart:developer' as developer;
 import 'dart:ui' as ui;
 
+import 'package:flutter/painting.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:vm_service/vm_service.dart';
diff --git a/packages/flutter/lib/src/widgets/text_editing_action.dart b/packages/flutter/lib/src/widgets/text_editing_action.dart
index 2b442aaa3ba..02732e31420 100644
--- a/packages/flutter/lib/src/widgets/text_editing_action.dart
+++ b/packages/flutter/lib/src/widgets/text_editing_action.dart
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart' show RenderEditable;
 
 import 'actions.dart';
diff --git a/packages/flutter/test/material/elevated_button_theme_test.dart b/packages/flutter/test/material/elevated_button_theme_test.dart
index daf2b1c9f25..9edff08c20c 100644
--- a/packages/flutter/test/material/elevated_button_theme_test.dart
+++ b/packages/flutter/test/material/elevated_button_theme_test.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
diff --git a/packages/flutter/test/material/outlined_button_theme_test.dart b/packages/flutter/test/material/outlined_button_theme_test.dart
index 1e3de4f6ae3..f2be79ff058 100644
--- a/packages/flutter/test/material/outlined_button_theme_test.dart
+++ b/packages/flutter/test/material/outlined_button_theme_test.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {
diff --git a/packages/flutter/test/material/text_button_theme_test.dart b/packages/flutter/test/material/text_button_theme_test.dart
index bc581336de0..746942d3410 100644
--- a/packages/flutter/test/material/text_button_theme_test.dart
+++ b/packages/flutter/test/material/text_button_theme_test.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 void main() {