diff --git a/dev/manual_tests/card_collection.dart b/dev/manual_tests/card_collection.dart
index 1e2c2610478..a79749ecb1f 100644
--- a/dev/manual_tests/card_collection.dart
+++ b/dev/manual_tests/card_collection.dart
@@ -248,7 +248,7 @@ class CardCollectionState extends State<CardCollection> {
 
   Widget _buildCard(BuildContext context, int index) {
     final CardModel cardModel = _cardModels[index];
-    final Widget card = new Dismissable(
+    final Widget card = new Dismissible(
       key: new ObjectKey(cardModel),
       direction: _dismissDirection,
       onDismissed: (DismissDirection direction) { dismissCard(cardModel); },
@@ -313,7 +313,7 @@ class CardCollectionState extends State<CardCollection> {
     final ThemeData theme = Theme.of(context);
     final TextStyle backgroundTextStyle = theme.primaryTextTheme.title;
 
-    // The background Widget appears behind the Dismissable card when the card
+    // The background Widget appears behind the Dismissible card when the card
     // moves to the left or right. The Positioned widget ensures that the
     // size of the background,card Stack will be based only on the card. The
     // Viewport ensures that when the card's resize animation occurs, the
diff --git a/examples/flutter_gallery/lib/demo/cupertino/cupertino_dialog_demo.dart b/examples/flutter_gallery/lib/demo/cupertino/cupertino_dialog_demo.dart
index 7c17f97fff5..b8f54978ace 100644
--- a/examples/flutter_gallery/lib/demo/cupertino/cupertino_dialog_demo.dart
+++ b/examples/flutter_gallery/lib/demo/cupertino/cupertino_dialog_demo.dart
@@ -19,7 +19,7 @@ class _CupertinoDialogDemoState extends State<CupertinoDialogDemo> {
     showDialog<T>(
       context: context,
       child: child,
-      barrierDismissable: false,
+      barrierDismissible: false,
     )
     .then<Null>((T value) { // The value passed to Navigator.pop() or null.
       if (value != null) {
diff --git a/examples/flutter_gallery/lib/demo/material/leave_behind_demo.dart b/examples/flutter_gallery/lib/demo/material/leave_behind_demo.dart
index d57f9e82f72..26d39733941 100644
--- a/examples/flutter_gallery/lib/demo/material/leave_behind_demo.dart
+++ b/examples/flutter_gallery/lib/demo/material/leave_behind_demo.dart
@@ -85,7 +85,7 @@ class LeaveBehindDemoState extends State<LeaveBehindDemo> {
 
   Widget buildItem(LeaveBehindItem item) {
     final ThemeData theme = Theme.of(context);
-    return new Dismissable(
+    return new Dismissible(
       key: new ObjectKey(item),
       direction: _dismissDirection,
       onDismissed: (DismissDirection direction) {
diff --git a/packages/flutter/lib/src/material/bottom_sheet.dart b/packages/flutter/lib/src/material/bottom_sheet.dart
index ca94a8a9310..c66d0aba4a3 100644
--- a/packages/flutter/lib/src/material/bottom_sheet.dart
+++ b/packages/flutter/lib/src/material/bottom_sheet.dart
@@ -215,7 +215,7 @@ class _ModalBottomSheetRoute<T> extends PopupRoute<T> {
   Duration get transitionDuration => _kBottomSheetDuration;
 
   @override
-  bool get barrierDismissable => true;
+  bool get barrierDismissible => true;
 
   @override
   Color get barrierColor => Colors.black54;
diff --git a/packages/flutter/lib/src/material/dialog.dart b/packages/flutter/lib/src/material/dialog.dart
index 6fe4fe92576..fa169a8e583 100644
--- a/packages/flutter/lib/src/material/dialog.dart
+++ b/packages/flutter/lib/src/material/dialog.dart
@@ -317,10 +317,10 @@ class SimpleDialog extends StatelessWidget {
 class _DialogRoute<T> extends PopupRoute<T> {
   _DialogRoute({
     @required this.theme,
-    bool barrierDismissable: true,
+    bool barrierDismissible: true,
     @required this.child,
-  }) : _barrierDismissable = barrierDismissable {
-    assert(barrierDismissable != null);
+  }) : _barrierDismissible = barrierDismissible {
+    assert(barrierDismissible != null);
   }
 
   final Widget child;
@@ -330,8 +330,8 @@ class _DialogRoute<T> extends PopupRoute<T> {
   Duration get transitionDuration => const Duration(milliseconds: 150);
 
   @override
-  bool get barrierDismissable => _barrierDismissable;
-  final bool _barrierDismissable;
+  bool get barrierDismissible => _barrierDismissible;
+  final bool _barrierDismissible;
 
   @override
   Color get barrierColor => Colors.black54;
@@ -368,12 +368,12 @@ class _DialogRoute<T> extends PopupRoute<T> {
 ///  * <https://material.google.com/components/dialogs.html>
 Future<T> showDialog<T>({
   @required BuildContext context,
-  bool barrierDismissable: true,
+  bool barrierDismissible: true,
   @required Widget child,
 }) {
   return Navigator.push(context, new _DialogRoute<T>(
     child: child,
     theme: Theme.of(context, shadowThemeOnly: true),
-    barrierDismissable: barrierDismissable,
+    barrierDismissible: barrierDismissible,
   ));
 }
diff --git a/packages/flutter/lib/src/material/dropdown.dart b/packages/flutter/lib/src/material/dropdown.dart
index d24a0608664..0f2c0d44b00 100644
--- a/packages/flutter/lib/src/material/dropdown.dart
+++ b/packages/flutter/lib/src/material/dropdown.dart
@@ -307,7 +307,7 @@ class _DropdownRoute<T> extends PopupRoute<_DropdownRouteResult<T>> {
   Duration get transitionDuration => _kDropdownMenuDuration;
 
   @override
-  bool get barrierDismissable => true;
+  bool get barrierDismissible => true;
 
   @override
   Color get barrierColor => null;
diff --git a/packages/flutter/lib/src/material/popup_menu.dart b/packages/flutter/lib/src/material/popup_menu.dart
index 07c4042f694..84b986311bc 100644
--- a/packages/flutter/lib/src/material/popup_menu.dart
+++ b/packages/flutter/lib/src/material/popup_menu.dart
@@ -396,7 +396,7 @@ class _PopupMenuRoute<T> extends PopupRoute<T> {
   Duration get transitionDuration => _kMenuDuration;
 
   @override
-  bool get barrierDismissable => true;
+  bool get barrierDismissible => true;
 
   @override
   Color get barrierColor => null;
diff --git a/packages/flutter/lib/src/material/snack_bar.dart b/packages/flutter/lib/src/material/snack_bar.dart
index aa224f80ac1..5b426dfd82e 100644
--- a/packages/flutter/lib/src/material/snack_bar.dart
+++ b/packages/flutter/lib/src/material/snack_bar.dart
@@ -231,8 +231,8 @@ class SnackBar extends StatelessWidget {
         },
         child: new Semantics(
           container: true,
-          child: new Dismissable(
-            key: const Key('dismissable'),
+          child: new Dismissible(
+            key: const Key('dismissible'),
             direction: DismissDirection.down,
             resizeDuration: null,
             onDismissed: (DismissDirection direction) {
diff --git a/packages/flutter/lib/src/widgets/dismissable.dart b/packages/flutter/lib/src/widgets/dismissible.dart
similarity index 91%
rename from packages/flutter/lib/src/widgets/dismissable.dart
rename to packages/flutter/lib/src/widgets/dismissible.dart
index 4556d31303c..47a9362e44b 100644
--- a/packages/flutter/lib/src/widgets/dismissable.dart
+++ b/packages/flutter/lib/src/widgets/dismissible.dart
@@ -17,32 +17,32 @@ const double _kMinFlingVelocityDelta = 400.0;
 const double _kFlingVelocityScale = 1.0 / 300.0;
 const double _kDismissThreshold = 0.4;
 
-/// Signature used by [Dismissable] to indicate that it has been dismissed in
+/// Signature used by [Dismissible] to indicate that it has been dismissed in
 /// the given `direction`.
 ///
-/// Used by [Dismissable.onDismissed].
+/// Used by [Dismissible.onDismissed].
 typedef void DismissDirectionCallback(DismissDirection direction);
 
-/// The direction in which a [Dismissable] can be dismissed.
+/// The direction in which a [Dismissible] can be dismissed.
 enum DismissDirection {
-  /// The [Dismissable] can be dismissed by dragging either up or down.
+  /// The [Dismissible] can be dismissed by dragging either up or down.
   vertical,
 
-  /// The [Dismissable] can be dismissed by dragging either left or right.
+  /// The [Dismissible] can be dismissed by dragging either left or right.
   horizontal,
 
-  /// The [Dismissable] can be dismissed by dragging in the reverse of the
+  /// The [Dismissible] can be dismissed by dragging in the reverse of the
   /// reading direction (e.g., from right to left in left-to-right languages).
   endToStart,
 
-  /// The [Dismissable] can be dismissed by dragging in the reading direction
+  /// The [Dismissible] can be dismissed by dragging in the reading direction
   /// (e.g., from left to right in left-to-right languages).
   startToEnd,
 
-  /// The [Dismissable] can be dismissed by dragging up only.
+  /// The [Dismissible] can be dismissed by dragging up only.
   up,
 
-  /// The [Dismissable] can be dismissed by dragging down only.
+  /// The [Dismissible] can be dismissed by dragging down only.
   down
 }
 
@@ -50,28 +50,28 @@ enum DismissDirection {
 ///
 /// Dragging or flinging this widget in the [DismissDirection] causes the child
 /// to slide out of view. Following the slide animation, if [resizeDuration] is
-/// non-null, the Dismissable widget animates its height (or width, whichever is
+/// non-null, the Dismissible widget animates its height (or width, whichever is
 /// perpendicular to the dismiss direction) to zero over the [resizeDuration].
 ///
 /// Backgrounds can be used to implement the "leave-behind" idiom. If a background
-/// is specified it is stacked behind the Dismissable's child and is exposed when
+/// is specified it is stacked behind the Dismissible's child and is exposed when
 /// the child moves.
 ///
 /// The widget calls the [onDimissed] callback either after its size has
 /// collapsed to zero (if [resizeDuration] is non-null) or immediately after
-/// the slide animation (if [resizeDuration] is null). If the Dismissable is a
+/// the slide animation (if [resizeDuration] is null). If the Dismissible is a
 /// list item, it must have a key that distinguishes it from the other items and
 /// its [onDismissed] callback must remove the item from the list.
-class Dismissable extends StatefulWidget {
+class Dismissible extends StatefulWidget {
   /// Creates a widget that can be dismissed.
   ///
-  /// The [key] argument must not be null because [Dismissable]s are commonly
+  /// The [key] argument must not be null because [Dismissible]s are commonly
   /// used in lists and removed from the list when dismissed. Without keys, the
   /// default behavior is to sync widgets based on their index in the list,
   /// which means the item after the dismissed item would be synced with the
   /// state of the dismissed item. Using keys causes the widgets to sync
   /// according to their keys and avoids this pitfall.
-  Dismissable({
+  Dismissible({
     @required Key key,
     @required this.child,
     this.background,
@@ -123,11 +123,11 @@ class Dismissable extends StatefulWidget {
   final Map<DismissDirection, double> dismissThresholds;
 
   @override
-  _DismissableState createState() => new _DismissableState();
+  _DismissibleState createState() => new _DismissibleState();
 }
 
-class _DismissableClipper extends CustomClipper<Rect> {
-  _DismissableClipper({
+class _DismissibleClipper extends CustomClipper<Rect> {
+  _DismissibleClipper({
     this.axis,
     this.moveAnimation
   }) : super(reclip: moveAnimation) {
@@ -160,13 +160,13 @@ class _DismissableClipper extends CustomClipper<Rect> {
   Rect getApproximateClipRect(Size size) => getClip(size);
 
   @override
-  bool shouldReclip(_DismissableClipper oldClipper) {
+  bool shouldReclip(_DismissibleClipper oldClipper) {
     return oldClipper.axis != axis
         || oldClipper.moveAnimation.value != moveAnimation.value;
   }
 }
 
-class _DismissableState extends State<Dismissable> with TickerProviderStateMixin {
+class _DismissibleState extends State<Dismissible> with TickerProviderStateMixin {
   @override
   void initState() {
     super.initState();
@@ -377,8 +377,8 @@ class _DismissableState extends State<Dismissable> with TickerProviderStateMixin
         if (_resizeAnimation.status != AnimationStatus.forward) {
           assert(_resizeAnimation.status == AnimationStatus.completed);
           throw new FlutterError(
-            'A dismissed Dismissable widget is still part of the tree.\n' +
-            'Make sure to implement the onDismissed handler and to immediately remove the Dismissable\n' +
+            'A dismissed Dismissible widget is still part of the tree.\n' +
+            'Make sure to implement the onDismissed handler and to immediately remove the Dismissible\n' +
             'widget from the application once that handler has fired.'
           );
         }
@@ -407,7 +407,7 @@ class _DismissableState extends State<Dismissable> with TickerProviderStateMixin
       if (!_moveAnimation.isDismissed) {
         children.add(new Positioned.fill(
           child: new ClipRect(
-            clipper: new _DismissableClipper(
+            clipper: new _DismissibleClipper(
               axis: _directionIsXAxis ? Axis.horizontal : Axis.vertical,
               moveAnimation: _moveAnimation,
             ),
diff --git a/packages/flutter/lib/src/widgets/modal_barrier.dart b/packages/flutter/lib/src/widgets/modal_barrier.dart
index 782388c9555..2246b8ee1b7 100644
--- a/packages/flutter/lib/src/widgets/modal_barrier.dart
+++ b/packages/flutter/lib/src/widgets/modal_barrier.dart
@@ -15,14 +15,14 @@ class ModalBarrier extends StatelessWidget {
   ModalBarrier({
     Key key,
     this.color,
-    this.dismissable: true
+    this.dismissible: true
   }) : super(key: key);
 
   /// If non-null, fill the barrier with this color.
   final Color color;
 
   /// Whether touching the barrier will pop the current route off the [Navigator].
-  final bool dismissable;
+  final bool dismissible;
 
   @override
   Widget build(BuildContext context) {
@@ -30,7 +30,7 @@ class ModalBarrier extends StatelessWidget {
       container: true,
       child: new GestureDetector(
         onTapDown: (TapDownDetails details) {
-          if (dismissable)
+          if (dismissible)
             Navigator.pop(context);
         },
         behavior: HitTestBehavior.opaque,
@@ -53,20 +53,20 @@ class AnimatedModalBarrier extends AnimatedWidget {
   AnimatedModalBarrier({
     Key key,
     Animation<Color> color,
-    this.dismissable: true
+    this.dismissible: true
   }) : super(key: key, listenable: color);
 
   /// If non-null, fill the barrier with this color.
   Animation<Color> get color => listenable;
 
   /// Whether touching the barrier will pop the current route off the [Navigator].
-  final bool dismissable;
+  final bool dismissible;
 
   @override
   Widget build(BuildContext context) {
     return new ModalBarrier(
       color: color?.value,
-      dismissable: dismissable
+      dismissible: dismissible
     );
   }
 }
diff --git a/packages/flutter/lib/src/widgets/pages.dart b/packages/flutter/lib/src/widgets/pages.dart
index db9467db3f5..224af503b7c 100644
--- a/packages/flutter/lib/src/widgets/pages.dart
+++ b/packages/flutter/lib/src/widgets/pages.dart
@@ -19,7 +19,7 @@ abstract class PageRoute<T> extends ModalRoute<T> {
   bool get opaque => true;
 
   @override
-  bool get barrierDismissable => false;
+  bool get barrierDismissible => false;
 
   @override
   bool canTransitionTo(TransitionRoute<dynamic> nextRoute) => nextRoute is PageRoute<dynamic>;
@@ -64,7 +64,7 @@ Widget _defaultTransitionsBuilder(BuildContext context, Animation<double> animat
 class PageRouteBuilder<T> extends PageRoute<T> {
   /// Creates a route that deletates to builder callbacks.
   ///
-  /// The [pageBuilder], [transitionsBuilder], [opaque], [barrierDismissable],
+  /// The [pageBuilder], [transitionsBuilder], [opaque], [barrierDismissible],
   /// and [maintainState] arguments must not be null.
   PageRouteBuilder({
     RouteSettings settings: const RouteSettings(),
@@ -72,14 +72,14 @@ class PageRouteBuilder<T> extends PageRoute<T> {
     this.transitionsBuilder: _defaultTransitionsBuilder,
     this.transitionDuration: const Duration(milliseconds: 300),
     this.opaque: true,
-    this.barrierDismissable: false,
+    this.barrierDismissible: false,
     this.barrierColor: null,
     this.maintainState: true,
   }) : super(settings: settings) {
     assert(pageBuilder != null);
     assert(transitionsBuilder != null);
     assert(opaque != null);
-    assert(barrierDismissable != null);
+    assert(barrierDismissible != null);
     assert(maintainState != null);
   }
 
@@ -100,7 +100,7 @@ class PageRouteBuilder<T> extends PageRoute<T> {
   final bool opaque;
 
   @override
-  final bool barrierDismissable;
+  final bool barrierDismissible;
 
   @override
   final Color barrierColor;
diff --git a/packages/flutter/lib/src/widgets/routes.dart b/packages/flutter/lib/src/widgets/routes.dart
index 0b943b8f2bf..8ae45ad7072 100644
--- a/packages/flutter/lib/src/widgets/routes.dart
+++ b/packages/flutter/lib/src/widgets/routes.dart
@@ -613,7 +613,7 @@ abstract class ModalRoute<T> extends TransitionRoute<T> with LocalHistoryRoute<T
   // The API for subclasses to override - used by this class
 
   /// Whether you can dismiss this route by tapping the modal barrier.
-  bool get barrierDismissable;
+  bool get barrierDismissible;
 
   /// The color to use for the modal barrier. If this is null, the barrier will
   /// be transparent.
@@ -816,10 +816,10 @@ abstract class ModalRoute<T> extends TransitionRoute<T> with LocalHistoryRoute<T
       ));
       barrier = new AnimatedModalBarrier(
         color: color,
-        dismissable: barrierDismissable
+        dismissible: barrierDismissible
       );
     } else {
-      barrier = new ModalBarrier(dismissable: barrierDismissable);
+      barrier = new ModalBarrier(dismissible: barrierDismissible);
     }
     assert(animation.status != AnimationStatus.dismissed);
     return new IgnorePointer(
diff --git a/packages/flutter/lib/widgets.dart b/packages/flutter/lib/widgets.dart
index 2247ab25d75..ec894d21b23 100644
--- a/packages/flutter/lib/widgets.dart
+++ b/packages/flutter/lib/widgets.dart
@@ -18,7 +18,7 @@ export 'src/widgets/basic.dart';
 export 'src/widgets/binding.dart';
 export 'src/widgets/container.dart';
 export 'src/widgets/debug.dart';
-export 'src/widgets/dismissable.dart';
+export 'src/widgets/dismissible.dart';
 export 'src/widgets/drag_target.dart';
 export 'src/widgets/editable_text.dart';
 export 'src/widgets/focus.dart';
diff --git a/packages/flutter/test/material/dialog_test.dart b/packages/flutter/test/material/dialog_test.dart
index 7275737841a..b1fbb4ce46e 100644
--- a/packages/flutter/test/material/dialog_test.dart
+++ b/packages/flutter/test/material/dialog_test.dart
@@ -138,7 +138,7 @@ void main() {
     expect(await result, equals(42));
   });
 
-  testWidgets('Barrier dismissable', (WidgetTester tester) async {
+  testWidgets('Barrier dismissible', (WidgetTester tester) async {
     await tester.pumpWidget(
       new MaterialApp(
         home: new Material(
@@ -175,7 +175,7 @@ void main() {
 
     showDialog<Null>(
       context: context,
-      barrierDismissable: false,
+      barrierDismissible: false,
       child: new Container(
         width: 100.0,
         height: 100.0,
diff --git a/packages/flutter/test/widgets/dismissable_test.dart b/packages/flutter/test/widgets/dismissible_test.dart
similarity index 94%
rename from packages/flutter/test/widgets/dismissable_test.dart
rename to packages/flutter/test/widgets/dismissible_test.dart
index d4a64128847..2dd7d8e3c27 100644
--- a/packages/flutter/test/widgets/dismissable_test.dart
+++ b/packages/flutter/test/widgets/dismissible_test.dart
@@ -16,8 +16,8 @@ Widget background;
 Widget buildTest({ double startToEndThreshold }) {
   return new StatefulBuilder(
     builder: (BuildContext context, StateSetter setState) {
-      Widget buildDismissableItem(int item) {
-        return new Dismissable(
+      Widget buildDismissibleItem(int item) {
+        return new Dismissible(
           key: new ValueKey<int>(item),
           direction: dismissDirection,
           onDismissed: (DismissDirection direction) {
@@ -49,7 +49,7 @@ Widget buildTest({ double startToEndThreshold }) {
           itemExtent: itemExtent,
           children: <int>[0, 1, 2, 3, 4]
             .where((int i) => !dismissedItems.contains(i))
-            .map(buildDismissableItem).toList(),
+            .map(buildDismissibleItem).toList(),
         ),
       );
     },
@@ -66,7 +66,7 @@ Future<Null> dismissElement(WidgetTester tester, Finder finder, { DismissDirecti
   switch (gestureDirection) {
     case DismissDirection.endToStart:
       // getTopRight() returns a point that's just beyond itemWidget's right
-      // edge and outside the Dismissable event listener's bounds.
+      // edge and outside the Dismissible event listener's bounds.
       downLocation = tester.getTopRight(finder) + const Offset(-0.1, 0.0);
       upLocation = tester.getTopLeft(finder);
       break;
@@ -77,7 +77,7 @@ Future<Null> dismissElement(WidgetTester tester, Finder finder, { DismissDirecti
       break;
     case DismissDirection.up:
       // getBottomLeft() returns a point that's just below itemWidget's bottom
-      // edge and outside the Dismissable event listener's bounds.
+      // edge and outside the Dismissible event listener's bounds.
       downLocation = tester.getBottomLeft(finder) + const Offset(0.0, -0.1);
       upLocation = tester.getTopLeft(finder);
       break;
@@ -111,14 +111,14 @@ Future<Null> dismissItem(WidgetTester tester, int item, { DismissDirection gestu
   await tester.pump(); // rebuild after the callback removes the entry
 }
 
-class Test1215DismissableWidget extends StatelessWidget {
-  Test1215DismissableWidget(this.text);
+class Test1215DismissibleWidget extends StatelessWidget {
+  Test1215DismissibleWidget(this.text);
 
   final String text;
 
   @override
   Widget build(BuildContext context) {
-    return new Dismissable(
+    return new Dismissible(
       key: new ObjectKey(text),
       child: new AspectRatio(
         aspectRatio: 1.0,
@@ -236,7 +236,7 @@ void main() {
     expect(dismissedItems, equals(<int>[0]));
   });
 
-  testWidgets('drag-left has no effect on dismissable with a high dismiss threshold', (WidgetTester tester) async {
+  testWidgets('drag-left has no effect on dismissible with a high dismiss threshold', (WidgetTester tester) async {
     scrollDirection = Axis.vertical;
     dismissDirection = DismissDirection.horizontal;
 
@@ -282,7 +282,7 @@ void main() {
   // now-obsolete URL https://github.com/flutter/engine/issues/1215 (the URL
   // died in the migration to the new repo). Don't copy this test; it doesn't
   // actually remove the dismissed widget, which is a violation of the
-  // Dismissable contract. This is not an example of good practice.
+  // Dismissible contract. This is not an example of good practice.
   testWidgets('dismissing bottom then top (smoketest)', (WidgetTester tester) async {
     await tester.pumpWidget(new Center(
       child: new Container(
@@ -290,8 +290,8 @@ void main() {
         height: 1000.0,
         child: new Column(
           children: <Widget>[
-            new Test1215DismissableWidget('1'),
-            new Test1215DismissableWidget('2'),
+            new Test1215DismissibleWidget('1'),
+            new Test1215DismissibleWidget('2'),
           ],
         ),
       ),
@@ -310,7 +310,7 @@ void main() {
     expect(find.text('2'), findsNothing);
   });
 
-  testWidgets('Dismissable starts from the full size when collapsing', (WidgetTester tester) async {
+  testWidgets('Dismissible starts from the full size when collapsing', (WidgetTester tester) async {
     scrollDirection = Axis.vertical;
     dismissDirection = DismissDirection.horizontal;
     background = new Text('background');
diff --git a/packages/flutter/test/widgets/modal_barrier_test.dart b/packages/flutter/test/widgets/modal_barrier_test.dart
index b98ec45308d..fa55ee1904b 100644
--- a/packages/flutter/test/widgets/modal_barrier_test.dart
+++ b/packages/flutter/test/widgets/modal_barrier_test.dart
@@ -28,7 +28,7 @@ void main() {
     final Widget subject = new Stack(
       children: <Widget>[
         tapTarget,
-        new ModalBarrier(dismissable: false),
+        new ModalBarrier(dismissible: false),
       ]
     );
 
@@ -42,7 +42,7 @@ void main() {
   testWidgets('ModalBarrier does not prevent interactions with widgets in front of it', (WidgetTester tester) async {
     final Widget subject = new Stack(
       children: <Widget>[
-        new ModalBarrier(dismissable: false),
+        new ModalBarrier(dismissible: false),
         tapTarget,
       ]
     );
@@ -99,7 +99,7 @@ class SecondWidget extends StatelessWidget {
   Widget build(BuildContext context) {
   return new ModalBarrier(
     key: const ValueKey<String>('barrier'),
-    dismissable: true
+    dismissible: true
   );
   }
 }
diff --git a/packages/flutter_tools/test/replay/osx/simulator_application_binary/vmservice/MANIFEST.txt b/packages/flutter_tools/test/replay/osx/simulator_application_binary/vmservice/MANIFEST.txt
index 09b42b21a7d..d9f0b0cf838 100644
--- a/packages/flutter_tools/test/replay/osx/simulator_application_binary/vmservice/MANIFEST.txt
+++ b/packages/flutter_tools/test/replay/osx/simulator_application_binary/vmservice/MANIFEST.txt
@@ -532,7 +532,7 @@
             "fixedId": true,
             "id": "libraries/35",
             "name": "",
-            "uri": "package:flutter/src/widgets/dismissable.dart"
+            "uri": "package:flutter/src/widgets/dismissible.dart"
           },
           {
             "type": "@Library",