diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation.dart
index 985aee7b9c5..6353bd1a0a8 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation.dart
@@ -34,6 +34,7 @@ export 'package:meta/meta.dart'
         visibleForTesting;
 
 export 'src/foundation/assertions.dart';
+export 'src/foundation/change_notifier.dart';
 export 'src/foundation/constants.dart';
 export 'src/foundation/diagnostics.dart';
 export 'src/foundation/key.dart';
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/assertions.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/assertions.dart
index acd36f18c2e..599fd01bdad 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/assertions.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/assertions.dart
@@ -7,6 +7,8 @@ import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 final foundationAssertionsLibrary = MockLibraryUnit(
   'lib/src/foundation/assertions.dart',
   r'''
+import 'diagnostics.dart';
+
 class FlutterErrorDetails with Diagnosticable {
   const FlutterErrorDetails({
     required Object exception,
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/diagnostics.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/diagnostics.dart
index 676537e0e0f..24c01015227 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/diagnostics.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/foundation/diagnostics.dart
@@ -26,6 +26,10 @@ class DiagnosticPropertiesBuilder {
 
 abstract class DiagnosticsNode {}
 
+enum DiagnosticsTreeStyle {
+  singleLine;
+}
+
 class DiagnosticsProperty<T> extends DiagnosticsNode {
   DiagnosticsProperty(
     String? name,
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering.dart
index f9a4f011afb..73b3fcd09a4 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering.dart
@@ -5,7 +5,10 @@
 import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 
 final renderingLibrary = MockLibraryUnit('lib/rendering.dart', r'''
+export 'package:vector_math/vector_math.dart';
+
 export 'painting.dart';
+export 'src/rendering/box.dart';
 export 'src/rendering/flex.dart';
-export 'src/rendering/paragraph.dart';
+export 'src/rendering/object.dart';
 ''');
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering/box.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering/box.dart
new file mode 100644
index 00000000000..00d6accfe9a
--- /dev/null
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering/box.dart
@@ -0,0 +1,11 @@
+// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
+
+final renderingBoxLibrary = MockLibraryUnit('lib/src/rendering/box.dart', r'''
+import 'object.dart';
+
+class BoxConstraints extends Constraints {}
+''');
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering/object.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering/object.dart
new file mode 100644
index 00000000000..e672ae867a3
--- /dev/null
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/rendering/object.dart
@@ -0,0 +1,12 @@
+// Copyright (c) 2026, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
+
+final renderingObjectLibrary = MockLibraryUnit(
+  'lib/src/rendering/object.dart',
+  r'''
+abstract class Constraints {}
+''',
+);
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets.dart
index 80d585c83cb..798ccac9834 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets.dart
@@ -11,12 +11,16 @@ export 'foundation.dart' show UniqueKey;
 export 'src/widgets/async.dart';
 export 'src/widgets/basic.dart';
 export 'src/widgets/container.dart';
+export 'src/widgets/decorated_sliver.dart';
 export 'src/widgets/framework.dart';
 export 'src/widgets/gesture_detector.dart';
+export 'src/widgets/icon_data.dart';
 export 'src/widgets/icon.dart';
 export 'src/widgets/inherited_theme.dart';
 export 'src/widgets/navigator.dart';
 export 'src/widgets/placeholder.dart';
+export 'src/widgets/scroll_view.dart';
+export 'src/widgets/sliver.dart';
 export 'src/widgets/text.dart';
 export 'src/widgets/ticker_provider.dart';
 export 'src/widgets/value_listenable_builder.dart';
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/async.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/async.dart
index d4660648933..ed545d344b4 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/async.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/async.dart
@@ -13,6 +13,10 @@ typedef AsyncWidgetBuilder<T> =
 @immutable
 class AsyncSnapshot<T> {}
 
+class FutureBuilder<T> extends StatefulWidget {
+  const FutureBuilder({super.key, required this.future, this.initialData, required this.builder});
+}
+
 class StreamBuilder<T> extends StreamBuilderBase<T, AsyncSnapshot<T>> {
   final T? initialData;
 
@@ -25,4 +29,6 @@ class StreamBuilder<T> extends StreamBuilderBase<T, AsyncSnapshot<T>> {
     required this.builder,
   });
 }
+
+abstract class StreamBuilderBase<T, S> extends StatefulWidget {}
 ''');
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/basic.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/basic.dart
index 9af0ede8c58..fb3050908f0 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/basic.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/basic.dart
@@ -10,6 +10,7 @@ import 'package:flutter/rendering.dart';
 import 'framework.dart';
 
 export 'package:flutter/animation.dart';
+export 'package:flutter/foundation.dart';
 export 'package:flutter/painting.dart';
 export 'package:flutter/rendering.dart';
 
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/decorated_sliver.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/decorated_sliver.dart
index 9e3006c4aa7..c28f5a401a1 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/decorated_sliver.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/decorated_sliver.dart
@@ -7,6 +7,11 @@ import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 final widgetsDecoratedSliverLibrary = MockLibraryUnit(
   'lib/src/widgets/decorated_sliver.dart',
   r'''
+import 'package:flutter/foundation.dart';
+import 'package:flutter/rendering.dart';
+
+import 'framework.dart';
+
 class DecoratedSliver extends SingleChildRenderObjectWidget {
   const DecoratedSliver({
     super.key,
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/icon.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/icon.dart
index 2dca9a0060c..2677de3fac8 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/icon.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/icon.dart
@@ -5,7 +5,12 @@
 import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 
 final widgetsIconLibrary = MockLibraryUnit('lib/src/widgets/icon.dart', r'''
+import 'package:flutter/foundation.dart';
+import 'package:flutter/rendering.dart';
+
+import 'basic.dart';
 import 'framework.dart';
+import 'icon_data.dart';
 
 class Icon extends StatelessWidget {
   final IconData? icon;
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/navigator.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/navigator.dart
index a74977e3073..0cd2a0668de 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/navigator.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/navigator.dart
@@ -7,6 +7,8 @@ import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 final widgetsNavigatorLibrary = MockLibraryUnit(
   'lib/src/widgets/navigator.dart',
   r'''
+import 'framework.dart';
+
 class Navigator extends StatefulWidget {
   static NavigatorState of(
     BuildContext context, {
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/scroll_view.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/scroll_view.dart
index f941d04aa56..2cd2637425e 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/scroll_view.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/scroll_view.dart
@@ -7,6 +7,12 @@ import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 final widgetsScrollViewLibrary = MockLibraryUnit(
   'lib/src/widgets/scroll_view.dart',
   r'''
+import 'package:flutter/rendering.dart';
+
+import 'basic.dart';
+import 'framework.dart';
+import 'sliver.dart';
+
 abstract class ScrollView extends StatelessWidget {
   const ScrollView({
     super.key,
diff --git a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/value_listenable_builder.dart b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/value_listenable_builder.dart
index 23be84ec56c..845487609bd 100644
--- a/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/value_listenable_builder.dart
+++ b/pkg/analyzer_testing/lib/src/mock_packages/flutter/widgets/value_listenable_builder.dart
@@ -7,6 +7,8 @@ import 'package:analyzer_testing/src/mock_packages/mock_library.dart';
 final widgetsValueListenableBuilderLibrary = MockLibraryUnit(
   'lib/src/widgets/value_listenable_builder.dart',
   r'''
+import 'package:flutter/foundation.dart';
+
 import 'framework.dart';
 
 typedef ValueWidgetBuilder<T> =