diff --git a/packages/flutter_tools/templates/app/lib/main.dart.tmpl b/packages/flutter_tools/templates/app/lib/main.dart.tmpl
index 6048c886753..24aa6560aca 100644
--- a/packages/flutter_tools/templates/app/lib/main.dart.tmpl
+++ b/packages/flutter_tools/templates/app/lib/main.dart.tmpl
@@ -137,7 +137,7 @@ class _MyHomePageState extends State<MyHomePage> {
           // action in the IDE, or press "p" in the console), to see the
           // wireframe for each widget.
           mainAxisAlignment: .center,
-          children: <Widget>[
+          children: [
             const Text('You have pushed the button this many times:'),
             Text(
               '$_counter',
diff --git a/packages/flutter_tools/templates/module/common/lib/main.dart.tmpl b/packages/flutter_tools/templates/module/common/lib/main.dart.tmpl
index 14d21ea2751..f1c73013515 100644
--- a/packages/flutter_tools/templates/module/common/lib/main.dart.tmpl
+++ b/packages/flutter_tools/templates/module/common/lib/main.dart.tmpl
@@ -98,7 +98,7 @@ class _MyHomePageState extends State<MyHomePage> {
           // axis because Columns are vertical (the cross axis would be
           // horizontal).
           mainAxisAlignment: .center,
-          children: <Widget>[
+          children: [
             const Text('You have pushed the button this many times:'),
             Text(
               '$_counter',
diff --git a/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/controls.dart.tmpl b/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/controls.dart.tmpl
index bf9d52e63f3..ab68ec6e269 100644
--- a/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/controls.dart.tmpl
+++ b/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/controls.dart.tmpl
@@ -50,7 +50,7 @@ class ZoomControls extends StatelessWidget {
   Widget build(BuildContext context) {
     return Row(
       mainAxisSize: MainAxisSize.min,
-      children: <Widget>[
+      children: [
         _WidgetPreviewIconButton(
           tooltip: 'Zoom in',
           onPressed: enabled ? _zoomIn : null,
diff --git a/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/widget_preview_rendering.dart.tmpl b/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/widget_preview_rendering.dart.tmpl
index 77255dad393..85e64574c07 100644
--- a/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/widget_preview_rendering.dart.tmpl
+++ b/packages/flutter_tools/templates/widget_preview_scaffold/lib/src/widget_preview_rendering.dart.tmpl
@@ -55,10 +55,10 @@ class _WidgetPreviewErrorWidget extends StatelessWidget {
       child: SingleChildScrollView(
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
-          children: <Widget>[
+          children: [
             Text.rich(
               TextSpan(
-                children: <TextSpan>[
+                children: [
                   TextSpan(
                     text: 'Failed to initialize widget tree: ',
                     style: boldStyle,
@@ -90,7 +90,7 @@ class _WidgetPreviewErrorWidget extends StatelessWidget {
     return frames.map<TextSpan>((frame) {
       if (frame is UnparsedFrame) return TextSpan(text: '$frame\n');
       return TextSpan(
-        children: <TextSpan>[
+        children: [
           TextSpan(
             text: frame.location,
             style: linkTextStyle,
@@ -122,7 +122,7 @@ class NoPreviewsDetectedWidget extends StatelessWidget {
     final style = fixBlurryText(TextStyle(color: Colors.black));
     return Center(
       child: Column(
-        children: <Widget>[
+        children: [
           Text(
             'No previews detected',
             style: style.copyWith(fontWeight: FontWeight.bold),
@@ -196,7 +196,7 @@ class WidgetPreviewGroupWidget extends StatelessWidget {
       spacing: WidgetPreviewGroupWidget._gridSpacing,
       runSpacing: WidgetPreviewGroupWidget._gridRunSpacing,
       alignment: WrapAlignment.start,
-      children: <Widget>[
+      children: [
         for (final WidgetPreview preview in previews)
           WidgetPreviewWidget(preview: preview),
       ],
@@ -963,7 +963,7 @@ class WidgetPreviews extends StatelessWidget {
         if (previewGroups.isEmpty) {
           return Column(
             mainAxisAlignment: MainAxisAlignment.center,
-            children: <Widget>[NoPreviewsDetectedWidget()],
+            children: [NoPreviewsDetectedWidget()],
           );
         }
         return LayoutBuilder(
diff --git a/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/controls.dart b/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/controls.dart
index bf9d52e63f3..ab68ec6e269 100644
--- a/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/controls.dart
+++ b/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/controls.dart
@@ -50,7 +50,7 @@ class ZoomControls extends StatelessWidget {
   Widget build(BuildContext context) {
     return Row(
       mainAxisSize: MainAxisSize.min,
-      children: <Widget>[
+      children: [
         _WidgetPreviewIconButton(
           tooltip: 'Zoom in',
           onPressed: enabled ? _zoomIn : null,
diff --git a/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/widget_preview_rendering.dart b/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/widget_preview_rendering.dart
index 77255dad393..85e64574c07 100644
--- a/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/widget_preview_rendering.dart
+++ b/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/lib/src/widget_preview_rendering.dart
@@ -55,10 +55,10 @@ class _WidgetPreviewErrorWidget extends StatelessWidget {
       child: SingleChildScrollView(
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
-          children: <Widget>[
+          children: [
             Text.rich(
               TextSpan(
-                children: <TextSpan>[
+                children: [
                   TextSpan(
                     text: 'Failed to initialize widget tree: ',
                     style: boldStyle,
@@ -90,7 +90,7 @@ class _WidgetPreviewErrorWidget extends StatelessWidget {
     return frames.map<TextSpan>((frame) {
       if (frame is UnparsedFrame) return TextSpan(text: '$frame\n');
       return TextSpan(
-        children: <TextSpan>[
+        children: [
           TextSpan(
             text: frame.location,
             style: linkTextStyle,
@@ -122,7 +122,7 @@ class NoPreviewsDetectedWidget extends StatelessWidget {
     final style = fixBlurryText(TextStyle(color: Colors.black));
     return Center(
       child: Column(
-        children: <Widget>[
+        children: [
           Text(
             'No previews detected',
             style: style.copyWith(fontWeight: FontWeight.bold),
@@ -196,7 +196,7 @@ class WidgetPreviewGroupWidget extends StatelessWidget {
       spacing: WidgetPreviewGroupWidget._gridSpacing,
       runSpacing: WidgetPreviewGroupWidget._gridRunSpacing,
       alignment: WrapAlignment.start,
-      children: <Widget>[
+      children: [
         for (final WidgetPreview preview in previews)
           WidgetPreviewWidget(preview: preview),
       ],
@@ -963,7 +963,7 @@ class WidgetPreviews extends StatelessWidget {
         if (previewGroups.isEmpty) {
           return Column(
             mainAxisAlignment: MainAxisAlignment.center,
-            children: <Widget>[NoPreviewsDetectedWidget()],
+            children: [NoPreviewsDetectedWidget()],
           );
         }
         return LayoutBuilder(
diff --git a/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/test/template_change_detection_smoke_test.dart b/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/test/template_change_detection_smoke_test.dart
index debfda2bcc0..e9e3beb5a74 100644
--- a/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/test/template_change_detection_smoke_test.dart
+++ b/packages/flutter_tools/test/widget_preview_scaffold.shard/widget_preview_scaffold/test/template_change_detection_smoke_test.dart
@@ -20,7 +20,7 @@ void main() {
     )) {
       stdout.writeln(
         'The widget_preview_scaffold contents do not match the widget_preview_scaffold '
-        'templates. Run "dart test/widget_preview_scaffold.shard/update_widget_preview_scaffold" '
+        'templates. Run "dart test/widget_preview_scaffold.shard/update_widget_preview_scaffold.dart" '
         'to update widget_preview_scaffold with the latest template contents.',
       );
       fail(