diff --git a/packages/flutter/test/widgets/backdrop_filter_test.dart b/packages/flutter/test/widgets/backdrop_filter_test.dart
index 11042fddda..226cdb8441 100644
--- a/packages/flutter/test/widgets/backdrop_filter_test.dart
+++ b/packages/flutter/test/widgets/backdrop_filter_test.dart
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:io';
 import 'dart:ui';
 
 import 'package:flutter/widgets.dart';
diff --git a/packages/flutter/test/widgets/editable_text_cursor_test.dart b/packages/flutter/test/widgets/editable_text_cursor_test.dart
index 72cfa0ca05..014ab4c934 100644
--- a/packages/flutter/test/widgets/editable_text_cursor_test.dart
+++ b/packages/flutter/test/widgets/editable_text_cursor_test.dart
@@ -2,8 +2,6 @@
 // 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:flutter/rendering.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
diff --git a/packages/flutter/test/widgets/invert_colors_test.dart b/packages/flutter/test/widgets/invert_colors_test.dart
index f306d3ce80..19714da0ef 100644
--- a/packages/flutter/test/widgets/invert_colors_test.dart
+++ b/packages/flutter/test/widgets/invert_colors_test.dart
@@ -2,8 +2,6 @@
 // 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:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
diff --git a/packages/flutter/test/widgets/list_wheel_scroll_view_test.dart b/packages/flutter/test/widgets/list_wheel_scroll_view_test.dart
index 80dc7332ed..39340a93f4 100644
--- a/packages/flutter/test/widgets/list_wheel_scroll_view_test.dart
+++ b/packages/flutter/test/widgets/list_wheel_scroll_view_test.dart
@@ -2,8 +2,6 @@
 // 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:flutter_test/flutter_test.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
diff --git a/packages/flutter/test/widgets/opacity_test.dart b/packages/flutter/test/widgets/opacity_test.dart
index e9c399d3fa..126237dbd8 100644
--- a/packages/flutter/test/widgets/opacity_test.dart
+++ b/packages/flutter/test/widgets/opacity_test.dart
@@ -2,8 +2,6 @@
 // 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:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
diff --git a/packages/flutter/test/widgets/physical_model_test.dart b/packages/flutter/test/widgets/physical_model_test.dart
index f33e431669..2f54e09a26 100644
--- a/packages/flutter/test/widgets/physical_model_test.dart
+++ b/packages/flutter/test/widgets/physical_model_test.dart
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:io' show Platform;
 import 'dart:math' as math show pi;
 
 import 'package:flutter/material.dart';
diff --git a/packages/flutter/test/widgets/shadow_test.dart b/packages/flutter/test/widgets/shadow_test.dart
index 6f54504d0c..c677110631 100644
--- a/packages/flutter/test/widgets/shadow_test.dart
+++ b/packages/flutter/test/widgets/shadow_test.dart
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:io' show Platform;
-
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 
@@ -138,4 +136,5 @@ void main() {
     debugDisableShadows = true;
   },
 //    skip: !Platform.isLinux
-  );
\ No newline at end of file
+  );
+}
\ No newline at end of file
diff --git a/packages/flutter/test/widgets/text_golden_test.dart b/packages/flutter/test/widgets/text_golden_test.dart
index c79359af14..4af608f5ae 100644
--- a/packages/flutter/test/widgets/text_golden_test.dart
+++ b/packages/flutter/test/widgets/text_golden_test.dart
@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:io' show Platform;
-
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';