diff --git a/lib/web_ui/lib/src/engine/html/path_to_svg_clip.dart b/lib/web_ui/lib/src/engine/html/path_to_svg_clip.dart
index 878ba758957da..27a8a4c5d9de7 100644
--- a/lib/web_ui/lib/src/engine/html/path_to_svg_clip.dart
+++ b/lib/web_ui/lib/src/engine/html/path_to_svg_clip.dart
@@ -5,8 +5,6 @@
 import 'package:ui/src/engine.dart';
 import 'package:ui/ui.dart' as ui;
 
-import '../browser_detection.dart';
-
 /// Counter used for generating clip path id inside an svg <defs> tag.
 int _clipIdCounter = 0;
 
diff --git a/lib/web_ui/lib/src/engine/html/shaders/normalized_gradient.dart b/lib/web_ui/lib/src/engine/html/shaders/normalized_gradient.dart
index 5afe9fe0dade9..2b1239783d445 100644
--- a/lib/web_ui/lib/src/engine/html/shaders/normalized_gradient.dart
+++ b/lib/web_ui/lib/src/engine/html/shaders/normalized_gradient.dart
@@ -7,7 +7,6 @@ import 'dart:typed_data';
 import 'package:ui/src/engine.dart';
 
 import 'package:ui/ui.dart' as ui;
-import 'shader_builder.dart';
 
 /// Converts colors and stops to typed array of bias, scale and threshold to use
 /// in shaders.
diff --git a/lib/web_ui/lib/src/engine/pointer_binding.dart b/lib/web_ui/lib/src/engine/pointer_binding.dart
index 80a97487434c0..a10ae138298a5 100644
--- a/lib/web_ui/lib/src/engine/pointer_binding.dart
+++ b/lib/web_ui/lib/src/engine/pointer_binding.dart
@@ -11,8 +11,6 @@ import 'package:meta/meta.dart';
 import 'package:ui/src/engine.dart';
 import 'package:ui/ui.dart' as ui;
 
-import 'pointer_converter.dart';
-
 /// Set this flag to true to see all the fired events in the console.
 const bool _debugLogPointerEvents = false;
 
diff --git a/lib/web_ui/test/engine/surface/scene_builder_test.dart b/lib/web_ui/test/engine/surface/scene_builder_test.dart
index 04d692c4765ec..c964d4b22d627 100644
--- a/lib/web_ui/test/engine/surface/scene_builder_test.dart
+++ b/lib/web_ui/test/engine/surface/scene_builder_test.dart
@@ -12,7 +12,6 @@ import 'dart:js_util' as js_util;
 import 'package:test/bootstrap/browser.dart';
 import 'package:test/test.dart';
 import 'package:ui/src/engine.dart';
-import 'package:ui/src/engine/html_image_codec.dart';
 import 'package:ui/ui.dart' hide window;
 
 
diff --git a/lib/web_ui/test/engine/surface/shaders/shader_builder_test.dart b/lib/web_ui/test/engine/surface/shaders/shader_builder_test.dart
index df67ce9e7962f..336cf4f8d8890 100644
--- a/lib/web_ui/test/engine/surface/shaders/shader_builder_test.dart
+++ b/lib/web_ui/test/engine/surface/shaders/shader_builder_test.dart
@@ -6,7 +6,6 @@
 import 'package:test/bootstrap/browser.dart';
 import 'package:test/test.dart';
 import 'package:ui/src/engine.dart';
-import 'package:ui/src/engine/html/shaders/shader_builder.dart';
 import 'package:ui/ui.dart' hide window;
 
 void main() {