diff --git a/gallery/gallery/lib/demos/cupertino/cupertino_activity_indicator_demo.dart b/gallery/gallery/lib/demos/cupertino/cupertino_activity_indicator_demo.dart
index c7b27d5a7..487d96964 100644
--- a/gallery/gallery/lib/demos/cupertino/cupertino_activity_indicator_demo.dart
+++ b/gallery/gallery/lib/demos/cupertino/cupertino_activity_indicator_demo.dart
@@ -12,6 +12,7 @@ class CupertinoProgressIndicatorDemo extends StatelessWidget {
   Widget build(BuildContext context) {
     return CupertinoPageScaffold(
       navigationBar: CupertinoNavigationBar(
+        automaticallyImplyLeading: false,
         middle: Text(
           GalleryLocalizations.of(context).demoCupertinoActivityIndicatorTitle,
         ),
diff --git a/gallery/gallery/lib/demos/cupertino/cupertino_slider_demo.dart b/gallery/gallery/lib/demos/cupertino/cupertino_slider_demo.dart
index d4c7f8fa0..ed896ff79 100644
--- a/gallery/gallery/lib/demos/cupertino/cupertino_slider_demo.dart
+++ b/gallery/gallery/lib/demos/cupertino/cupertino_slider_demo.dart
@@ -21,6 +21,7 @@ class _CupertinoSliderDemoState extends State<CupertinoSliderDemo> {
   Widget build(BuildContext context) {
     return CupertinoPageScaffold(
       navigationBar: CupertinoNavigationBar(
+        automaticallyImplyLeading: false,
         middle: Text(GalleryLocalizations.of(context).demoCupertinoSliderTitle),
       ),
       child: DefaultTextStyle(
diff --git a/gallery/gallery/lib/demos/cupertino/cupertino_switch_demo.dart b/gallery/gallery/lib/demos/cupertino/cupertino_switch_demo.dart
index 4238f9e81..6e6a16c11 100644
--- a/gallery/gallery/lib/demos/cupertino/cupertino_switch_demo.dart
+++ b/gallery/gallery/lib/demos/cupertino/cupertino_switch_demo.dart
@@ -20,6 +20,7 @@ class _CupertinoSwitchDemoState extends State<CupertinoSwitchDemo> {
   Widget build(BuildContext context) {
     return CupertinoPageScaffold(
       navigationBar: CupertinoNavigationBar(
+        automaticallyImplyLeading: false,
         middle: Text(
           GalleryLocalizations.of(context).demoSelectionControlsSwitchTitle,
         ),
diff --git a/gallery/gallery/lib/demos/material/bottom_app_bar_demo.dart b/gallery/gallery/lib/demos/material/bottom_app_bar_demo.dart
index f4254bd71..05b3d3d88 100644
--- a/gallery/gallery/lib/demos/material/bottom_app_bar_demo.dart
+++ b/gallery/gallery/lib/demos/material/bottom_app_bar_demo.dart
@@ -39,6 +39,7 @@ class _BottomAppBarDemoState extends State<BottomAppBarDemo> {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
+        automaticallyImplyLeading: false,
         title: Text(GalleryLocalizations.of(context).demoBottomAppBarTitle),
       ),
       body: ListView(
diff --git a/gallery/gallery/lib/demos/material/progress_indicator_demo.dart b/gallery/gallery/lib/demos/material/progress_indicator_demo.dart
index 51190a9e2..9d88f4cc3 100644
--- a/gallery/gallery/lib/demos/material/progress_indicator_demo.dart
+++ b/gallery/gallery/lib/demos/material/progress_indicator_demo.dart
@@ -93,6 +93,7 @@ class _ProgressIndicatorDemoState extends State<ProgressIndicatorDemo>
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
+        automaticallyImplyLeading: false,
         title: Text(_title),
       ),
       body: Center(