diff --git a/packages/flutter/test/widgets/scrollable_helpers_test.dart b/packages/flutter/test/widgets/scrollable_helpers_test.dart
new file mode 100644
index 0000000000..7c2bc30004
--- /dev/null
+++ b/packages/flutter/test/widgets/scrollable_helpers_test.dart
@@ -0,0 +1,478 @@
+// Copyright 2014 The Flutter Authors. 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:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+final LogicalKeyboardKey modifierKey = defaultTargetPlatform == TargetPlatform.macOS
+  ? LogicalKeyboardKey.metaLeft
+  : LogicalKeyboardKey.controlLeft;
+
+void main() {
+  testWidgets("Keyboard scrolling doesn't happen if scroll physics are set to NeverScrollableScrollPhysics", (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: CustomScrollView(
+          controller: controller,
+          physics: const NeverScrollableScrollPhysics(),
+          slivers: List<Widget>.generate(
+            20,
+            (int index) {
+              return SliverToBoxAdapter(
+                child: Focus(
+                  autofocus: index == 0,
+                  child: SizedBox(
+                    key: ValueKey<String>('Box $index'),
+                    height: 50.0,
+                  ),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+    await tester.sendKeyDownEvent(modifierKey);
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
+    await tester.sendKeyUpEvent(modifierKey);
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+    await tester.sendKeyDownEvent(modifierKey);
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
+    await tester.sendKeyUpEvent(modifierKey);
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+  }, variant: KeySimulatorTransitModeVariant.all());
+
+  testWidgets('Vertical scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: CustomScrollView(
+          controller: controller,
+          slivers: List<Widget>.generate(
+            20,
+            (int index) {
+              return SliverToBoxAdapter(
+                child: Focus(
+                  autofocus: index == 0,
+                  child: SizedBox(
+                    key: ValueKey<String>('Box $index'),
+                    height: 50.0,
+                  ),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+    // We exclude the modifier keys here for web testing since default web shortcuts
+    // do not use a modifier key with arrow keys for ScrollActions.
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, -50.0, 800.0, 0.0)),
+    );
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, -400.0, 800.0, -350.0)),
+    );
+    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)),
+    );
+  }, variant: KeySimulatorTransitModeVariant.all());
+
+  testWidgets('Horizontal scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: CustomScrollView(
+          controller: controller,
+          scrollDirection: Axis.horizontal,
+          slivers: List<Widget>.generate(
+            20,
+            (int index) {
+              return SliverToBoxAdapter(
+                child: Focus(
+                  autofocus: index == 0,
+                  child: SizedBox(
+                    key: ValueKey<String>('Box $index'),
+                    width: 50.0,
+                  ),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 50.0, 600.0)),
+    );
+    // We exclude the modifier keys here for web testing since default web shortcuts
+    // do not use a modifier key with arrow keys for ScrollActions.
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(-50.0, 0.0, 0.0, 600.0)),
+    );
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 50.0, 600.0)),
+    );
+  }, variant: KeySimulatorTransitModeVariant.all());
+
+  testWidgets('Horizontal scrollables are scrolled the correct direction in RTL locales.', (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: Directionality(
+          textDirection: TextDirection.rtl,
+          child: CustomScrollView(
+            controller: controller,
+            scrollDirection: Axis.horizontal,
+            slivers: List<Widget>.generate(
+              20,
+                  (int index) {
+                return SliverToBoxAdapter(
+                  child: Focus(
+                    autofocus: index == 0,
+                    child: SizedBox(
+                      key: ValueKey<String>('Box $index'),
+                      width: 50.0,
+                    ),
+                  ),
+                );
+              },
+            ),
+          ),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.0)),
+    );
+    // We exclude the modifier keys here for web testing since default web shortcuts
+    // do not use a modifier key with arrow keys for ScrollActions.
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(800.0, 0.0, 850.0, 600.0)),
+    );
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.0)),
+    );
+  }, variant: KeySimulatorTransitModeVariant.all());
+
+  testWidgets('Reversed vertical scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    final FocusNode focusNode = FocusNode(debugLabel: 'SizedBox');
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: CustomScrollView(
+          controller: controller,
+          reverse: true,
+          slivers: List<Widget>.generate(
+            20,
+            (int index) {
+              return SliverToBoxAdapter(
+                child: Focus(
+                  focusNode: focusNode,
+                  child: SizedBox(
+                    key: ValueKey<String>('Box $index'),
+                    height: 50.0,
+                  ),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+
+    focusNode.requestFocus();
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)),
+    );
+    // We exclude the modifier keys here for web testing since default web shortcuts
+    // do not use a modifier key with arrow keys for ScrollActions.
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 600.0, 800.0, 650.0)),
+    );
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)),
+    );
+    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 950.0, 800.0, 1000.0)),
+    );
+    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)),
+    );
+  }, variant: KeySimulatorTransitModeVariant.all());
+
+  testWidgets('Reversed horizontal scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    final FocusNode focusNode = FocusNode(debugLabel: 'SizedBox');
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: CustomScrollView(
+          controller: controller,
+          scrollDirection: Axis.horizontal,
+          reverse: true,
+          slivers: List<Widget>.generate(
+            20,
+            (int index) {
+              return SliverToBoxAdapter(
+                child: Focus(
+                  focusNode: focusNode,
+                  child: SizedBox(
+                    key: ValueKey<String>('Box $index'),
+                    width: 50.0,
+                  ),
+                ),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+
+    focusNode.requestFocus();
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.00)),
+    );
+    // We exclude the modifier keys here for web testing since default web shortcuts
+    // do not use a modifier key with arrow keys for ScrollActions.
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(800.0, 0.0, 850.0, 600.0)),
+    );
+    if (!kIsWeb) {
+      await tester.sendKeyDownEvent(modifierKey);
+    }
+    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
+    if (!kIsWeb) {
+      await tester.sendKeyUpEvent(modifierKey);
+    }
+    await tester.pumpAndSettle();
+  }, variant: KeySimulatorTransitModeVariant.all());
+
+  testWidgets('Custom scrollables with a center sliver are scrolled when activated via keyboard.', (WidgetTester tester) async {
+    final ScrollController controller = ScrollController();
+    final List<String> items = List<String>.generate(20, (int index) => 'Item $index');
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData(platform: TargetPlatform.fuchsia),
+        home: CustomScrollView(
+          controller: controller,
+          center: const ValueKey<String>('Center'),
+          slivers: items.map<Widget>(
+            (String item) {
+              return SliverToBoxAdapter(
+                key: item == 'Item 10' ? const ValueKey<String>('Center') : null,
+                child: Focus(
+                  autofocus: item == 'Item 10',
+                  child: Container(
+                    key: ValueKey<String>(item),
+                    alignment: Alignment.center,
+                    height: 100,
+                    child: Text(item),
+                  ),
+                ),
+              );
+            },
+          ).toList(),
+        ),
+      ),
+    );
+
+    await tester.pumpAndSettle();
+    expect(controller.position.pixels, equals(0.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0)),
+    );
+    for (int i = 0; i < 10; ++i) {
+      // We exclude the modifier keys here for web testing since default web shortcuts
+      // do not use a modifier key with arrow keys for ScrollActions.
+      if (!kIsWeb) {
+        await tester.sendKeyDownEvent(modifierKey);
+      }
+      await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
+      if (!kIsWeb) {
+        await tester.sendKeyUpEvent(modifierKey);
+      }
+      await tester.pumpAndSettle();
+    }
+    // Starts at #10 already, so doesn't work out to 500.0 because it hits bottom.
+    expect(controller.position.pixels, equals(400.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, -400.0, 800.0, -300.0)),
+    );
+    for (int i = 0; i < 10; ++i) {
+      if (!kIsWeb) {
+        await tester.sendKeyDownEvent(modifierKey);
+      }
+      await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
+      if (!kIsWeb) {
+        await tester.sendKeyUpEvent(modifierKey);
+      }
+      await tester.pumpAndSettle();
+    }
+    // Goes up two past "center" where it started, so negative.
+    expect(controller.position.pixels, equals(-100.0));
+    expect(
+      tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)),
+      equals(const Rect.fromLTRB(0.0, 100.0, 800.0, 200.0)),
+    );
+  }, variant: KeySimulatorTransitModeVariant.all());
+}
diff --git a/packages/flutter/test/widgets/scrollable_test.dart b/packages/flutter/test/widgets/scrollable_test.dart
index 73a71414d5..7b448a2c1c 100644
--- a/packages/flutter/test/widgets/scrollable_test.dart
+++ b/packages/flutter/test/widgets/scrollable_test.dart
@@ -87,10 +87,6 @@ Future<void> pumpDoubleScrollableTest(
 
 const double dragOffset = 200.0;
 
-final LogicalKeyboardKey modifierKey = defaultTargetPlatform == TargetPlatform.macOS
-    ? LogicalKeyboardKey.metaLeft
-    : LogicalKeyboardKey.controlLeft;
-
 double getScrollOffset(WidgetTester tester, {bool last = true}) {
   Finder viewportFinder = find.byType(Viewport);
   if (last) {
@@ -599,388 +595,6 @@ void main() {
     });
   });
 
-  testWidgets("Keyboard scrolling doesn't happen if scroll physics are set to NeverScrollableScrollPhysics", (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: CustomScrollView(
-          controller: controller,
-          physics: const NeverScrollableScrollPhysics(),
-          slivers: List<Widget>.generate(
-            20,
-            (int index) {
-              return SliverToBoxAdapter(
-                child: Focus(
-                  autofocus: index == 0,
-                  child: SizedBox(key: ValueKey<String>('Box $index'), height: 50.0),
-                ),
-              );
-            },
-          ),
-        ),
-      ),
-    );
-
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-    await tester.sendKeyDownEvent(modifierKey);
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
-    await tester.sendKeyUpEvent(modifierKey);
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-    await tester.sendKeyDownEvent(modifierKey);
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
-    await tester.sendKeyUpEvent(modifierKey);
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-  }, variant: KeySimulatorTransitModeVariant.all());
-
-  testWidgets('Vertical scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: CustomScrollView(
-          controller: controller,
-          slivers: List<Widget>.generate(
-            20,
-            (int index) {
-              return SliverToBoxAdapter(
-                child: Focus(
-                  autofocus: index == 0,
-                  child: SizedBox(key: ValueKey<String>('Box $index'), height: 50.0),
-                ),
-              );
-            },
-          ),
-        ),
-      ),
-    );
-
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-    // We exclude the modifier keys here for web testing since default web shortcuts
-    // do not use a modifier key with arrow keys for ScrollActions.
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, -50.0, 800.0, 0.0)));
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, -400.0, 800.0, -350.0)));
-    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 50.0)));
-  }, variant: KeySimulatorTransitModeVariant.all());
-
-  testWidgets('Horizontal scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: CustomScrollView(
-          controller: controller,
-          scrollDirection: Axis.horizontal,
-          slivers: List<Widget>.generate(
-            20,
-            (int index) {
-              return SliverToBoxAdapter(
-                child: Focus(
-                  autofocus: index == 0,
-                  child: SizedBox(key: ValueKey<String>('Box $index'), width: 50.0),
-                ),
-              );
-            },
-          ),
-        ),
-      ),
-    );
-
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 50.0, 600.0)));
-    // We exclude the modifier keys here for web testing since default web shortcuts
-    // do not use a modifier key with arrow keys for ScrollActions.
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(-50.0, 0.0, 0.0, 600.0)));
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 50.0, 600.0)));
-  }, variant: KeySimulatorTransitModeVariant.all());
-
-  testWidgets('Horizontal scrollables are scrolled the correct direction in RTL locales.', (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: Directionality(
-          textDirection: TextDirection.rtl,
-          child: CustomScrollView(
-            controller: controller,
-            scrollDirection: Axis.horizontal,
-            slivers: List<Widget>.generate(
-              20,
-                  (int index) {
-                return SliverToBoxAdapter(
-                  child: Focus(
-                    autofocus: index == 0,
-                    child: SizedBox(key: ValueKey<String>('Box $index'), width: 50.0),
-                  ),
-                );
-              },
-            ),
-          ),
-        ),
-      ),
-    );
-
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.0)));
-    // We exclude the modifier keys here for web testing since default web shortcuts
-    // do not use a modifier key with arrow keys for ScrollActions.
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(800.0, 0.0, 850.0, 600.0)));
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.0)));
-  }, variant: KeySimulatorTransitModeVariant.all());
-
-  testWidgets('Reversed vertical scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    final FocusNode focusNode = FocusNode(debugLabel: 'SizedBox');
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: CustomScrollView(
-          controller: controller,
-          reverse: true,
-          slivers: List<Widget>.generate(
-            20,
-            (int index) {
-              return SliverToBoxAdapter(
-                child: Focus(
-                  focusNode: focusNode,
-                  child: SizedBox(key: ValueKey<String>('Box $index'), height: 50.0),
-                ),
-              );
-            },
-          ),
-        ),
-      ),
-    );
-
-    focusNode.requestFocus();
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)));
-    // We exclude the modifier keys here for web testing since default web shortcuts
-    // do not use a modifier key with arrow keys for ScrollActions.
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 600.0, 800.0, 650.0)));
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)));
-    await tester.sendKeyEvent(LogicalKeyboardKey.pageUp);
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 950.0, 800.0, 1000.0)));
-    await tester.sendKeyEvent(LogicalKeyboardKey.pageDown);
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 550.0, 800.0, 600.0)));
-  }, variant: KeySimulatorTransitModeVariant.all());
-
-  testWidgets('Reversed horizontal scrollables are scrolled when activated via keyboard.', (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    final FocusNode focusNode = FocusNode(debugLabel: 'SizedBox');
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: CustomScrollView(
-          controller: controller,
-          scrollDirection: Axis.horizontal,
-          reverse: true,
-          slivers: List<Widget>.generate(
-            20,
-            (int index) {
-              return SliverToBoxAdapter(
-                child: Focus(
-                  focusNode: focusNode,
-                  child: SizedBox(key: ValueKey<String>('Box $index'), width: 50.0),
-                ),
-              );
-            },
-          ),
-        ),
-      ),
-    );
-
-    focusNode.requestFocus();
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(750.0, 0.0, 800.0, 600.00)));
-    // We exclude the modifier keys here for web testing since default web shortcuts
-    // do not use a modifier key with arrow keys for ScrollActions.
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowLeft);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Box 0'), skipOffstage: false)), equals(const Rect.fromLTRB(800.0, 0.0, 850.0, 600.0)));
-    if (!kIsWeb) {
-      await tester.sendKeyDownEvent(modifierKey);
-    }
-    await tester.sendKeyEvent(LogicalKeyboardKey.arrowRight);
-    if (!kIsWeb) {
-      await tester.sendKeyUpEvent(modifierKey);
-    }
-    await tester.pumpAndSettle();
-  }, variant: KeySimulatorTransitModeVariant.all());
-
-  testWidgets('Custom scrollables with a center sliver are scrolled when activated via keyboard.', (WidgetTester tester) async {
-    final ScrollController controller = ScrollController();
-    final List<String> items = List<String>.generate(20, (int index) => 'Item $index');
-    await tester.pumpWidget(
-      MaterialApp(
-        theme: ThemeData(
-          platform: TargetPlatform.fuchsia,
-        ),
-        home: CustomScrollView(
-          controller: controller,
-          center: const ValueKey<String>('Center'),
-          slivers: items.map<Widget>(
-            (String item) {
-              return SliverToBoxAdapter(
-                key: item == 'Item 10' ? const ValueKey<String>('Center') : null,
-                child: Focus(
-                  autofocus: item == 'Item 10',
-                  child: Container(
-                    key: ValueKey<String>(item),
-                    alignment: Alignment.center,
-                    height: 100,
-                    child: Text(item),
-                  ),
-                ),
-              );
-            },
-          ).toList(),
-        ),
-      ),
-    );
-
-    await tester.pumpAndSettle();
-    expect(controller.position.pixels, equals(0.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 0.0, 800.0, 100.0)));
-    for (int i = 0; i < 10; ++i) {
-      // We exclude the modifier keys here for web testing since default web shortcuts
-      // do not use a modifier key with arrow keys for ScrollActions.
-      if (!kIsWeb) {
-        await tester.sendKeyDownEvent(modifierKey);
-      }
-      await tester.sendKeyEvent(LogicalKeyboardKey.arrowDown);
-      if (!kIsWeb) {
-        await tester.sendKeyUpEvent(modifierKey);
-      }
-      await tester.pumpAndSettle();
-    }
-    // Starts at #10 already, so doesn't work out to 500.0 because it hits bottom.
-    expect(controller.position.pixels, equals(400.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, -400.0, 800.0, -300.0)));
-    for (int i = 0; i < 10; ++i) {
-      if (!kIsWeb) {
-        await tester.sendKeyDownEvent(modifierKey);
-      }
-      await tester.sendKeyEvent(LogicalKeyboardKey.arrowUp);
-      if (!kIsWeb) {
-        await tester.sendKeyUpEvent(modifierKey);
-      }
-      await tester.pumpAndSettle();
-    }
-    // Goes up two past "center" where it started, so negative.
-    expect(controller.position.pixels, equals(-100.0));
-    expect(tester.getRect(find.byKey(const ValueKey<String>('Item 10'), skipOffstage: false)), equals(const Rect.fromLTRB(0.0, 100.0, 800.0, 200.0)));
-  }, variant: KeySimulatorTransitModeVariant.all());
-
   testWidgets('Can recommendDeferredLoadingForContext - animation', (WidgetTester tester) async {
     final List<String> widgetTracker = <String>[];
     int cheapWidgets = 0;