diff --git a/lib/web_ui/dev/steps/copy_artifacts_step.dart b/lib/web_ui/dev/steps/copy_artifacts_step.dart
index 930b30ac9f894..2fc7294f1a0d0 100644
--- a/lib/web_ui/dev/steps/copy_artifacts_step.dart
+++ b/lib/web_ui/dev/steps/copy_artifacts_step.dart
@@ -37,18 +37,20 @@ class CopyArtifactsStep implements PipelineStep {
     await copyTestFonts();
     await copySkiaTestImages();
     await copyFlutterJsFiles();
+    final copied = <String>[];
     if (artifactDeps.canvasKit) {
-      print('Copying CanvasKit...');
+      copied.add('CanvasKit');
       await copyCanvasKitFiles('canvaskit', 'canvaskit');
     }
     if (artifactDeps.canvasKitChromium) {
-      print('Copying CanvasKit (Chromium)...');
+      copied.add('CanvasKit (Chromium)');
       await copyCanvasKitFiles('canvaskit_chromium', 'canvaskit/chromium');
     }
     if (artifactDeps.skwasm) {
-      print('Copying Skwasm...');
+      copied.add('Skwasm');
       await copySkwasm();
     }
+    print('Copied artifacts: ${copied.join(', ')}');
   }
 
   Future<void> copyTestFonts() async {
diff --git a/lib/web_ui/dev/steps/run_suite_step.dart b/lib/web_ui/dev/steps/run_suite_step.dart
index 50f8336571edf..e6aa7efda777f 100644
--- a/lib/web_ui/dev/steps/run_suite_step.dart
+++ b/lib/web_ui/dev/steps/run_suite_step.dart
@@ -176,13 +176,11 @@ class RunSuiteStep implements PipelineStep {
 
   Future<SkiaGoldClient?> _createSkiaClient() async {
     if (suite.testBundle.compileConfigs.length > 1) {
-      print('Not creating skia client due to multiple compile configs');
       // Multiple compile configs are only used for our fallback tests, which
       // do not collect goldens.
       return null;
     }
     if (suite.runConfig.browser == BrowserName.safari) {
-      print('Not creating skia client for Safari');
       // Goldens from Safari produce too many diffs, disabled for now.
       // See https://github.com/flutter/flutter/issues/143591
       return null;
@@ -206,17 +204,17 @@ class RunSuiteStep implements PipelineStep {
       'Renderer': rendererName,
       if (variant != null) 'CanvasKitVariant': variant.name,
     };
-    print('Created Skia Gold Client. dimensions: $dimensions');
     final SkiaGoldClient skiaClient = SkiaGoldClient(
       workDirectory,
       dimensions: dimensions,
     );
 
     if (await _checkSkiaClient(skiaClient)) {
-      print('Successfully checked Skia Gold Client');
+      print('Using SkiaGoldClient with dimensions: $dimensions');
       return skiaClient;
     }
 
+    print('Could not connect to Skia Gold.');
     if (requireSkiaGold) {
       throw ToolExit('Skia Gold is required but is unavailable.');
     }
diff --git a/lib/web_ui/lib/channel_buffers.dart b/lib/web_ui/lib/channel_buffers.dart
index 48d777ce2d539..fdc9948284e42 100644
--- a/lib/web_ui/lib/channel_buffers.dart
+++ b/lib/web_ui/lib/channel_buffers.dart
@@ -126,10 +126,17 @@ class ChannelBuffers {
 
   final Map<String, _Channel> _channels = <String, _Channel>{};
 
+  @visibleForTesting
+  bool debugPrintOverflowWarning = true;
+
   void push(String name, ByteData? data, PlatformMessageResponseCallback callback) {
     final _Channel channel = _channels.putIfAbsent(name, () => _Channel());
     if (channel.push(_StoredMessage(data, callback))) {
       assert(() {
+        if (!debugPrintOverflowWarning) {
+          return true;
+        }
+
         print(
           'A message on the $name channel was discarded before it could be handled.\n'
           'This happens when a plugin sends messages to the framework side before the '
diff --git a/lib/web_ui/lib/src/engine/view_embedder/embedding_strategy/full_page_embedding_strategy.dart b/lib/web_ui/lib/src/engine/view_embedder/embedding_strategy/full_page_embedding_strategy.dart
index 90de0467d295d..878b6d8c220cc 100644
--- a/lib/web_ui/lib/src/engine/view_embedder/embedding_strategy/full_page_embedding_strategy.dart
+++ b/lib/web_ui/lib/src/engine/view_embedder/embedding_strategy/full_page_embedding_strategy.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:meta/meta.dart';
 import 'package:ui/src/engine/dom.dart';
 import 'package:ui/src/engine/util.dart' show setElementStyle;
 
@@ -19,6 +20,9 @@ class FullPageEmbeddingStrategy implements EmbeddingStrategy {
     _setHostStyles();
   }
 
+  @visibleForTesting
+  static bool debugPrintExistingMetaWarning = true;
+
   @override
   final DomElement hostElement = domDocument.body!;
 
@@ -65,6 +69,10 @@ class FullPageEmbeddingStrategy implements EmbeddingStrategy {
     for (final DomElement viewportMeta
         in domDocument.head!.querySelectorAll('meta[name="viewport"]')) {
       assert(() {
+        if (!debugPrintExistingMetaWarning) {
+          return true;
+        }
+
         // Filter out the meta tag that the engine placed on the page. This is
         // to avoid UI flicker during hot restart. Hot restart will clean up the
         // old meta tag synchronously with the first post-restart frame.
diff --git a/lib/web_ui/lib/ui.dart b/lib/web_ui/lib/ui.dart
index 5dc40b227ecd9..56a12a45fd9d2 100644
--- a/lib/web_ui/lib/ui.dart
+++ b/lib/web_ui/lib/ui.dart
@@ -13,6 +13,8 @@ import 'dart:convert';
 import 'dart:math' as math;
 import 'dart:typed_data';
 
+import 'package:meta/meta.dart';
+
 import 'src/engine.dart' as engine;
 import 'ui_web/src/ui_web.dart' as ui_web;
 
diff --git a/lib/web_ui/test/canvaskit/canvaskit_api_tt_on_test.dart b/lib/web_ui/test/canvaskit/canvaskit_api_tt_on_test.dart
index 1827f23ef6bd8..b243734df99ea 100644
--- a/lib/web_ui/test/canvaskit/canvaskit_api_tt_on_test.dart
+++ b/lib/web_ui/test/canvaskit/canvaskit_api_tt_on_test.dart
@@ -54,7 +54,6 @@ void testMainWithTTOn() {
 /// Enables Trusted Types by setting the appropriate meta tag in the DOM:
 /// <meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script'">
 void enableTrustedTypes() {
-  print('Enabling TrustedTypes in browser window...');
   final DomHTMLMetaElement enableTTMeta = createDomHTMLMetaElement()
     ..setAttribute('http-equiv', 'Content-Security-Policy')
     ..content = "require-trusted-types-for 'script'";
diff --git a/lib/web_ui/test/common/test_initialization.dart b/lib/web_ui/test/common/test_initialization.dart
index a766291c0263d..e801e7fb6e25a 100644
--- a/lib/web_ui/test/common/test_initialization.dart
+++ b/lib/web_ui/test/common/test_initialization.dart
@@ -66,9 +66,24 @@ void setUpImplicitView() {
     await myWindow.resetHistory();
     myWindow.dispose();
   });
+
+  ignoreUnhandledPlatformMessages();
+}
+
+// This is necessary in tests to avoid spamming the console with warnings.
+//
+// App lifecycle is one of the culprits here. It keeps trying to send messages
+// to update the lifecycle state, but that leads to a warning because there's
+// no platform message handler.
+void ignoreUnhandledPlatformMessages() {
+  setUp(() {
+    ui.channelBuffers.debugPrintOverflowWarning = false;
+  });
 }
 
 Future<void> bootstrapAndRunApp({bool withImplicitView = false}) async {
+  ui.channelBuffers.debugPrintOverflowWarning = false;
+
   final Completer<void> completer = Completer<void>();
   await ui_web.bootstrapEngine(runApp: () => completer.complete());
   await completer.future;
diff --git a/lib/web_ui/test/engine/app_bootstrap_test.dart b/lib/web_ui/test/engine/app_bootstrap_test.dart
index d9f55f6f6029b..522eba3c09a68 100644
--- a/lib/web_ui/test/engine/app_bootstrap_test.dart
+++ b/lib/web_ui/test/engine/app_bootstrap_test.dart
@@ -11,6 +11,8 @@ import 'package:test/bootstrap/browser.dart';
 import 'package:test/test.dart';
 import 'package:ui/src/engine.dart';
 
+import '../common/test_initialization.dart';
+
 void main() {
   internalBootstrapBrowserTest(() => testMain);
 }
@@ -21,6 +23,8 @@ void testMain() {
   int initCalled = 0;
   int runCalled = 0;
 
+  ignoreUnhandledPlatformMessages();
+
   setUp(() {
     callOrder = 1;
     initCalled = 0;
diff --git a/lib/web_ui/test/engine/channel_buffers_test.dart b/lib/web_ui/test/engine/channel_buffers_test.dart
index 7bc79d3397957..56b46ebe8544d 100644
--- a/lib/web_ui/test/engine/channel_buffers_test.dart
+++ b/lib/web_ui/test/engine/channel_buffers_test.dart
@@ -86,6 +86,7 @@ void testMain() {
     final ByteData data = _makeByteData('bar');
     final
     ui.ChannelBuffers buffers = ui.ChannelBuffers();
+    buffers.debugPrintOverflowWarning = false;
     void callback(ByteData? responseData) {}
     _resize(buffers, channel, 0);
     buffers.push(channel, data, callback);
@@ -115,6 +116,7 @@ void testMain() {
     final ByteData three = _makeByteData('three');
     final ByteData four = _makeByteData('four');
     final ui.ChannelBuffers buffers = ui.ChannelBuffers();
+    buffers.debugPrintOverflowWarning = false;
     void callback(ByteData? responseData) {}
     _resize(buffers, channel, 3);
     buffers.push(channel, one, callback);
@@ -185,6 +187,7 @@ void testMain() {
     final ByteData one = _makeByteData('one');
     final ByteData two = _makeByteData('two');
     final ui.ChannelBuffers buffers = ui.ChannelBuffers();
+    buffers.debugPrintOverflowWarning = false;
     bool didCallCallback = false;
     void oneCallback(ByteData? responseData) {
       expect(responseData, isNull);
@@ -214,6 +217,7 @@ void testMain() {
   test('ChannelBuffers.setListener', () async {
     final List<String> log = <String>[];
     final ui.ChannelBuffers buffers = ui.ChannelBuffers();
+    buffers.debugPrintOverflowWarning = false;
     final ByteData one = _makeByteData('one');
     final ByteData two = _makeByteData('two');
     final ByteData three = _makeByteData('three');
diff --git a/lib/web_ui/test/engine/initialization_test.dart b/lib/web_ui/test/engine/initialization_test.dart
index 2fbb2f76e15f6..88f6e952e9dbf 100644
--- a/lib/web_ui/test/engine/initialization_test.dart
+++ b/lib/web_ui/test/engine/initialization_test.dart
@@ -33,7 +33,6 @@ void testMain() {
     JSAny? engineInitializer;
 
     void didCreateEngineInitializerMock(JSAny? obj) {
-      print('obj: $obj');
       engineInitializer = obj;
     }
 
diff --git a/lib/web_ui/test/engine/pointer_binding/event_position_helper_test.dart b/lib/web_ui/test/engine/pointer_binding/event_position_helper_test.dart
index 14f41dccbbf9a..7d582cdaf3710 100644
--- a/lib/web_ui/test/engine/pointer_binding/event_position_helper_test.dart
+++ b/lib/web_ui/test/engine/pointer_binding/event_position_helper_test.dart
@@ -12,6 +12,8 @@ import 'package:test/test.dart';
 import 'package:ui/src/engine.dart';
 import 'package:ui/ui.dart' as ui show Offset;
 
+import '../../common/test_initialization.dart';
+
 void main() {
   internalBootstrapBrowserTest(() => doTests);
 }
@@ -29,6 +31,8 @@ void doTests() {
     return (await nextEvent) as DomPointerEvent;
   }
 
+  ignoreUnhandledPlatformMessages();
+
   group('computeEventOffsetToTarget', () {
     setUp(() {
       view = EngineFlutterView(EnginePlatformDispatcher.instance, domDocument.body!);
@@ -135,10 +139,14 @@ void doTests() {
 
     test('Event dispatched by TalkBack gets a computed offset', () async {
       // Fill this in to test _computeOffsetForTalkbackEvent
-    }, skip: 'To be implemented!');
+
+      // To be implemented!
+    }, skip: true);
 
     test('Event dispatched on text editing node computes offset with framework geometry', () async {
       // Fill this in to test _computeOffsetForInputs
-    }, skip: 'To be implemented!');
+
+      // To be implemented!
+    }, skip: true);
   });
 }
diff --git a/lib/web_ui/test/engine/view_embedder/embedding_strategy/custom_element_embedding_strategy_test.dart b/lib/web_ui/test/engine/view_embedder/embedding_strategy/custom_element_embedding_strategy_test.dart
index 0a954377f10c5..ee056b79cb901 100644
--- a/lib/web_ui/test/engine/view_embedder/embedding_strategy/custom_element_embedding_strategy_test.dart
+++ b/lib/web_ui/test/engine/view_embedder/embedding_strategy/custom_element_embedding_strategy_test.dart
@@ -10,6 +10,8 @@ import 'package:test/test.dart';
 import 'package:ui/src/engine/dom.dart';
 import 'package:ui/src/engine/view_embedder/embedding_strategy/custom_element_embedding_strategy.dart';
 
+import '../../../common/test_initialization.dart';
+
 void main() {
   internalBootstrapBrowserTest(() => doTests);
 }
@@ -18,6 +20,8 @@ void doTests() {
   late CustomElementEmbeddingStrategy strategy;
   late DomElement target;
 
+  ignoreUnhandledPlatformMessages();
+
   group('initialize', () {
     setUp(() {
       target = createDomElement('this-is-the-target');
diff --git a/lib/web_ui/test/engine/view_embedder/embedding_strategy/embedding_strategy_test.dart b/lib/web_ui/test/engine/view_embedder/embedding_strategy/embedding_strategy_test.dart
index f254455ecd58a..f5f5d619c929c 100644
--- a/lib/web_ui/test/engine/view_embedder/embedding_strategy/embedding_strategy_test.dart
+++ b/lib/web_ui/test/engine/view_embedder/embedding_strategy/embedding_strategy_test.dart
@@ -12,11 +12,15 @@ import 'package:ui/src/engine/view_embedder/embedding_strategy/custom_element_em
 import 'package:ui/src/engine/view_embedder/embedding_strategy/embedding_strategy.dart';
 import 'package:ui/src/engine/view_embedder/embedding_strategy/full_page_embedding_strategy.dart';
 
+import '../../../common/test_initialization.dart';
+
 void main() {
   internalBootstrapBrowserTest(() => doTests);
 }
 
 void doTests() {
+  ignoreUnhandledPlatformMessages();
+
   group('Factory', () {
     test('Creates a FullPage instance when hostElement is null', () async {
       final EmbeddingStrategy strategy = EmbeddingStrategy.create();
diff --git a/lib/web_ui/test/engine/view_embedder/embedding_strategy/full_page_embedding_strategy_test.dart b/lib/web_ui/test/engine/view_embedder/embedding_strategy/full_page_embedding_strategy_test.dart
index bb096227dbdd1..f96c34b856946 100644
--- a/lib/web_ui/test/engine/view_embedder/embedding_strategy/full_page_embedding_strategy_test.dart
+++ b/lib/web_ui/test/engine/view_embedder/embedding_strategy/full_page_embedding_strategy_test.dart
@@ -10,13 +10,18 @@ import 'package:test/test.dart';
 import 'package:ui/src/engine/dom.dart';
 import 'package:ui/src/engine/view_embedder/embedding_strategy/full_page_embedding_strategy.dart';
 
+import '../../../common/test_initialization.dart';
+
 void main() {
   internalBootstrapBrowserTest(() => doTests);
 }
 
 void doTests() {
+  ignoreUnhandledPlatformMessages();
+
   group('initialize', () {
     test('Prepares target environment', () {
+      FullPageEmbeddingStrategy.debugPrintExistingMetaWarning = false;
       final DomElement target = domDocument.body!;
       final DomHTMLMetaElement meta = createDomHTMLMetaElement();
       meta
@@ -49,6 +54,7 @@ void doTests() {
       expect(flutterMeta, isNotNull);
       expect(flutterMeta!.hasAttribute('flt-viewport'), isTrue,
           reason: 'Should install flutter viewport meta tag.');
+      FullPageEmbeddingStrategy.debugPrintExistingMetaWarning = true;
     });
   });
 
diff --git a/lib/web_ui/test/engine/window_test.dart b/lib/web_ui/test/engine/window_test.dart
index 905c1416f7ba2..6f568a1b1e15f 100644
--- a/lib/web_ui/test/engine/window_test.dart
+++ b/lib/web_ui/test/engine/window_test.dart
@@ -13,28 +13,20 @@ import 'package:ui/src/engine.dart';
 import 'package:ui/ui.dart' as ui;
 
 import '../common/matchers.dart';
+import '../common/test_initialization.dart';
 
 const int kPhysicalKeyA = 0x00070004;
 const int kLogicalKeyA = 0x00000000061;
 
+EnginePlatformDispatcher get dispatcher => EnginePlatformDispatcher.instance;
+EngineFlutterWindow get myWindow => dispatcher.implicitView!;
+
 void main() {
   internalBootstrapBrowserTest(() => testMain);
 }
 
 Future<void> testMain() async {
-  late EngineFlutterWindow myWindow;
-  final EnginePlatformDispatcher dispatcher = EnginePlatformDispatcher.instance;
-
-  setUp(() {
-    myWindow = EngineFlutterView.implicit(dispatcher, createDomHTMLDivElement());
-    dispatcher.viewManager.registerView(myWindow);
-  });
-
-  tearDown(() async {
-    dispatcher.viewManager.unregisterView(myWindow.viewId);
-    await myWindow.resetHistory();
-    myWindow.dispose();
-  });
+  setUpImplicitView();
 
   test('onTextScaleFactorChanged preserves the zone', () {
     final Zone innerZone = Zone.current.fork();
@@ -473,6 +465,7 @@ Future<void> testMain() async {
   });
 
   test('in full-page mode, Flutter window replaces viewport meta tags', () {
+    FullPageEmbeddingStrategy.debugPrintExistingMetaWarning = false;
     final DomHTMLMetaElement existingMeta = createDomHTMLMetaElement()
       ..name = 'viewport'
       ..content = 'foo=bar';
@@ -493,6 +486,7 @@ Future<void> testMain() async {
     expect(newMeta.content, contains('maximum-scale=1.0'));
     expect(newMeta.content, contains('user-scalable=no'));
     implicitView.dispose();
+    FullPageEmbeddingStrategy.debugPrintExistingMetaWarning = true;
   });
 
   test('auto-view-id', () {
diff --git a/lib/web_ui/test/html/compositing/compositing_golden_test.dart b/lib/web_ui/test/html/compositing/compositing_golden_test.dart
index a47d3f44ece5c..bd470bb020d05 100644
--- a/lib/web_ui/test/html/compositing/compositing_golden_test.dart
+++ b/lib/web_ui/test/html/compositing/compositing_golden_test.dart
@@ -214,9 +214,9 @@ void _testCullRectComputation() {
 
     final PersistedPicture picture = enumeratePictures().single;
     expect(picture.optimalLocalCullRect, const ui.Rect.fromLTRB(0, 0, 500, 100));
-  }, skip: '''
-  TODO(https://github.com/flutter/flutter/issues/40395)
-  Needs ability to set iframe to 500,100 size. Current screen seems to be 500,500''');
+    // Needs ability to set iframe to 500,100 size. Current screen seems to be 500,500
+    // https://github.com/flutter/flutter/issues/40395
+  }, skip: true);
 
   // Draw a picture that overflows the screen. Verify that cull rect is the
   // intersection of screen bounds and paint bounds.
@@ -297,9 +297,9 @@ void _testCullRectComputation() {
     expect(
         picture.debugExactGlobalCullRect, const ui.Rect.fromLTRB(0, 70, 20, 100));
     expect(picture.optimalLocalCullRect, const ui.Rect.fromLTRB(0, -20, 20, 10));
-  }, skip: '''
-  TODO(https://github.com/flutter/flutter/issues/40395)
-  Needs ability to set iframe to 500,100 size. Current screen seems to be 500,500''');
+    // Needs ability to set iframe to 500,100 size. Current screen seems to be 500,500
+    // https://github.com/flutter/flutter/issues/40395
+  }, skip: true);
 
   // Draw a picture inside a layer clip but fill all available space inside it.
   // Verify that the cull rect is equal to the layer clip.