diff --git a/packages/flutter/lib/src/material/snack_bar.dart b/packages/flutter/lib/src/material/snack_bar.dart
index de80b2b45a71..5bed2ab347ce 100644
--- a/packages/flutter/lib/src/material/snack_bar.dart
+++ b/packages/flutter/lib/src/material/snack_bar.dart
@@ -842,11 +842,12 @@ class _SnackbarDefaultsM2 extends SnackBarThemeData {
 
   @override
   TextStyle? get contentTextStyle => ThemeData(
-          brightness: _theme.brightness == Brightness.light
-              ? Brightness.dark
-              : Brightness.light)
-      .textTheme
-      .titleMedium;
+    useMaterial3: _theme.useMaterial3,
+    brightness: _theme.brightness == Brightness.light
+      ? Brightness.dark
+      : Brightness.light)
+    .textTheme
+    .titleMedium;
 
   @override
   SnackBarBehavior get behavior => SnackBarBehavior.fixed;
diff --git a/packages/flutter/test/material/dropdown_menu_test.dart b/packages/flutter/test/material/dropdown_menu_test.dart
index 6ec5e480a5b5..50fba56e13b6 100644
--- a/packages/flutter/test/material/dropdown_menu_test.dart
+++ b/packages/flutter/test/material/dropdown_menu_test.dart
@@ -112,7 +112,7 @@ void main() {
   testWidgets('The width of the text field should always be the same as the menu view',
     (WidgetTester tester) async {
 
-    final ThemeData themeData = ThemeData();
+    final ThemeData themeData = ThemeData(useMaterial3: false);
     final bool useMaterial3 = themeData.useMaterial3;
     await tester.pumpWidget(
       MaterialApp(
diff --git a/packages/flutter/test/material/icon_button_test.dart b/packages/flutter/test/material/icon_button_test.dart
index 6ca92b500eff..949a467b1be2 100644
--- a/packages/flutter/test/material/icon_button_test.dart
+++ b/packages/flutter/test/material/icon_button_test.dart
@@ -789,7 +789,7 @@ void main() {
 
     await tester.pumpWidget(
       wrap(
-        useMaterial3: theme.useMaterial3,
+        useMaterial3: false,
         child: Column(
           children: <Widget>[
             IconButton(
diff --git a/packages/flutter/test/material/ink_sparkle_test.dart b/packages/flutter/test/material/ink_sparkle_test.dart
index 6a76bb9a5361..6fea3242e3d3 100644
--- a/packages/flutter/test/material/ink_sparkle_test.dart
+++ b/packages/flutter/test/material/ink_sparkle_test.dart
@@ -116,6 +116,7 @@ Future<void> _runTest(WidgetTester tester, String positionName, double distanceF
   final Key buttonKey = UniqueKey();
 
   await tester.pumpWidget(MaterialApp(
+    theme: ThemeData(useMaterial3: false),
     home: Scaffold(
       body: Center(
         child: RepaintBoundary(
diff --git a/packages/flutter/test/material/input_decorator_test.dart b/packages/flutter/test/material/input_decorator_test.dart
index c5767468720b..a2c4b252c53a 100644
--- a/packages/flutter/test/material/input_decorator_test.dart
+++ b/packages/flutter/test/material/input_decorator_test.dart
@@ -4488,6 +4488,7 @@ void main() {
       // This is a regression test for https://github.com/flutter/flutter/issues/82321
       Widget buildFrame(TextDirection textDirection) {
         return MaterialApp(
+          theme: ThemeData(useMaterial3: false),
           home: Scaffold(
             body: Container(
               padding: const EdgeInsets.all(16.0),
@@ -4536,6 +4537,7 @@ void main() {
 
       Widget buildFrame(TextDirection textDirection) {
         return MaterialApp(
+          theme: ThemeData(useMaterial3: false),
           home: Scaffold(
             body: Container(
               padding: const EdgeInsets.all(16.0),
diff --git a/packages/flutter/test/material/material_test.dart b/packages/flutter/test/material/material_test.dart
index ba8a399d934f..f08733a29e57 100644
--- a/packages/flutter/test/material/material_test.dart
+++ b/packages/flutter/test/material/material_test.dart
@@ -924,6 +924,7 @@ void main() {
       final Key painterKey = UniqueKey();
 
       await tester.pumpWidget(MaterialApp(
+        theme: ThemeData(useMaterial3: false),
         home: Scaffold(
           body: RepaintBoundary(
             key: painterKey,
@@ -962,6 +963,7 @@ void main() {
       final Key painterKey = UniqueKey();
 
       await tester.pumpWidget(MaterialApp(
+        theme: ThemeData(useMaterial3: false),
         home: Scaffold(
           body: RepaintBoundary(
             key: painterKey,
diff --git a/packages/flutter/test/material/page_test.dart b/packages/flutter/test/material/page_test.dart
index 531025084eaf..b0486a9cfac8 100644
--- a/packages/flutter/test/material/page_test.dart
+++ b/packages/flutter/test/material/page_test.dart
@@ -252,6 +252,7 @@ void main() {
       RepaintBoundary(
         key: key,
         child: MaterialApp(
+          theme: ThemeData(useMaterial3: false),
           onGenerateRoute: (RouteSettings settings) {
             return MaterialPageRoute<void>(
               builder: (BuildContext context) {
diff --git a/packages/flutter/test/material/progress_indicator_test.dart b/packages/flutter/test/material/progress_indicator_test.dart
index fdf268f4aa95..c68e3507a897 100644
--- a/packages/flutter/test/material/progress_indicator_test.dart
+++ b/packages/flutter/test/material/progress_indicator_test.dart
@@ -723,7 +723,10 @@ void main() {
     final AnimationSheetBuilder animationSheet = AnimationSheetBuilder(frameSize: const Size(50, 50));
 
     await tester.pumpFrames(animationSheet.record(
-      const _RefreshProgressIndicatorGolden(),
+      Theme(
+        data: ThemeData(useMaterial3: false),
+        child: const _RefreshProgressIndicatorGolden()
+      ),
     ), const Duration(seconds: 3));
 
     await expectLater(
@@ -1001,11 +1004,14 @@ void main() {
     final AnimationSheetBuilder animationSheet = AnimationSheetBuilder(frameSize: const Size(40, 40));
 
     await tester.pumpFrames(animationSheet.record(
-      const Directionality(
-        textDirection: TextDirection.ltr,
-        child: Padding(
-          padding: EdgeInsets.all(4),
-          child: CircularProgressIndicator(),
+      Theme(
+        data: ThemeData(useMaterial3: false),
+        child: const Directionality(
+          textDirection: TextDirection.ltr,
+          child: Padding(
+            padding: EdgeInsets.all(4),
+            child: CircularProgressIndicator(),
+          ),
         ),
       ),
     ), const Duration(seconds: 2));
diff --git a/packages/flutter/test/material/radio_list_tile_test.dart b/packages/flutter/test/material/radio_list_tile_test.dart
index f94c18cb5f8e..e5ca1bf498ab 100644
--- a/packages/flutter/test/material/radio_list_tile_test.dart
+++ b/packages/flutter/test/material/radio_list_tile_test.dart
@@ -1101,7 +1101,7 @@ void main() {
       return null;
     }
 
-    final ThemeData theme = ThemeData();
+    final ThemeData theme = ThemeData(useMaterial3: false);
     final bool material3 = theme.useMaterial3;
     Widget buildRadio({bool active = false, bool useOverlay = true}) {
       return wrap(
diff --git a/packages/flutter/test/material/snack_bar_test.dart b/packages/flutter/test/material/snack_bar_test.dart
index 23497a23afc7..a31753412f84 100644
--- a/packages/flutter/test/material/snack_bar_test.dart
+++ b/packages/flutter/test/material/snack_bar_test.dart
@@ -2155,8 +2155,9 @@ void main() {
   });
 
   testWidgets('SnackBars should be shown above the bottomSheet', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2238,6 +2239,7 @@ void main() {
 
   testWidgets('ScaffoldMessenger presents SnackBars to only the root Scaffold when Scaffolds are nested.', (WidgetTester tester) async {
     await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
       home: Scaffold(
         body: const Scaffold(),
         floatingActionButton: FloatingActionButton(onPressed: () {}),
@@ -2439,6 +2441,7 @@ void main() {
   testWidgets('Snackbar by default clips BackdropFilter', (WidgetTester tester) async {
     // Regression test for https://github.com/flutter/flutter/issues/98205
     await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
       home: Scaffold(
         body: const Scaffold(),
         floatingActionButton: FloatingActionButton(onPressed: () {}),
@@ -2469,8 +2472,9 @@ void main() {
   });
 
   testWidgets('Floating snackbar can display optional icon', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2500,8 +2504,9 @@ void main() {
   });
 
   testWidgets('Fixed width snackbar can display optional icon', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2526,8 +2531,9 @@ void main() {
   });
 
     testWidgets('Fixed snackbar can display optional icon without action', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2554,8 +2560,9 @@ void main() {
 
   testWidgets(
       'Floating width snackbar can display optional icon without action', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2580,8 +2587,9 @@ void main() {
   });
 
   testWidgets('Floating multi-line snackbar with icon is aligned correctly', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2607,8 +2615,9 @@ void main() {
   });
 
   testWidgets('Floating multi-line snackbar with icon and actionOverflowThreshold=1 is aligned correctly', (WidgetTester tester) async {
-    await tester.pumpWidget(const MaterialApp(
-      home: Scaffold(
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(useMaterial3: false),
+      home: const Scaffold(
         bottomSheet: SizedBox(
           width: 200,
           height: 50,
@@ -2627,10 +2636,10 @@ void main() {
       behavior: SnackBarBehavior.floating,
       actionOverflowThreshold: 1,
     ));
-    await tester.pumpAndSettle(); // Have the SnackBar fully animate out.
+    await tester.pumpAndSettle(); // Have the SnackBar fully animate in.
 
     await expectLater(find.byType(MaterialApp),
-        matchesGoldenFile('snack_bar.goldenTest.multiLineWithIconWithZeroActionOverflowThreshold.png'));
+      matchesGoldenFile('snack_bar.goldenTest.multiLineWithIconWithZeroActionOverflowThreshold.png'));
   });
 
   testWidgets(
diff --git a/packages/flutter/test/material/text_field_test.dart b/packages/flutter/test/material/text_field_test.dart
index 687fda4c4f5d..08026d59b4c2 100644
--- a/packages/flutter/test/material/text_field_test.dart
+++ b/packages/flutter/test/material/text_field_test.dart
@@ -918,13 +918,16 @@ void main() {
   });
 
   testWidgets('Material cursor golden', (WidgetTester tester) async {
-    final Widget widget = overlay(
-      child: const RepaintBoundary(
-        key: ValueKey<int>(1),
-        child: TextField(
-          cursorColor: Colors.blue,
-          cursorWidth: 15,
-          cursorRadius: Radius.circular(3.0),
+    final Widget widget = Theme(
+      data: ThemeData(useMaterial3: false),
+      child: overlay(
+        child: const RepaintBoundary(
+          key: ValueKey<int>(1),
+          child: TextField(
+            cursorColor: Colors.blue,
+            cursorWidth: 15,
+            cursorRadius: Radius.circular(3.0),
+          ),
         ),
       ),
     );
@@ -1095,6 +1098,7 @@ void main() {
     );
     await tester.pumpWidget(
       MaterialApp(
+        theme: ThemeData(useMaterial3: false),
         home: Material(
           child: Center(
             child: RepaintBoundary(
@@ -1143,6 +1147,7 @@ void main() {
     );
     await tester.pumpWidget(
       MaterialApp(
+        theme: ThemeData(useMaterial3: false),
         home: Material(
           child: Center(
             child: RepaintBoundary(