diff --git a/packages/devtools_app/test/shared/initializer_test.dart b/packages/devtools_app/test/shared/initializer_test.dart
index 8fb6d297631..464071fc741 100644
--- a/packages/devtools_app/test/shared/initializer_test.dart
+++ b/packages/devtools_app/test/shared/initializer_test.dart
@@ -13,7 +13,6 @@ import 'package:mockito/mockito.dart';
 
 void main() {
   group('Initializer', () {
-    late MaterialApp app;
     const Key initializedKey = Key('initialized');
     setUp(() {
       final serviceManager = FakeServiceManager();
@@ -22,17 +21,20 @@ void main() {
       setGlobal(ServiceConnectionManager, serviceManager);
       setGlobal(FrameworkController, FrameworkController());
       setGlobal(OfflineModeController, OfflineModeController());
+      setGlobal(IdeTheme, IdeTheme());
+    });
 
-      app = MaterialApp(
-        initialRoute: '/init',
-        routes: {
-          '/init': (_) => Initializer(
-                url: null,
-                builder: (_) => const SizedBox(key: initializedKey),
-              ),
-        },
+    Future<void> pumpInitializer(WidgetTester tester) async {
+      await tester.pumpWidget(
+        wrap(
+          Initializer(
+            url: null,
+            builder: (_) => const SizedBox(key: initializedKey),
+          ),
+        ),
       );
-    });
+      await tester.pumpAndSettle();
+    }
 
     testWidgets(
       'shows disconnected overlay if not connected',
@@ -43,8 +45,7 @@ void main() {
             hasConnection: false,
           ),
         );
-
-        await tester.pumpFrames(app, const Duration(milliseconds: 100));
+        await pumpInitializer(tester);
         expect(find.text('Disconnected'), findsOneWidget);
       },
     );
@@ -56,15 +57,16 @@ void main() {
         setGlobal(ServiceConnectionManager, serviceManager);
 
         // Expect standard connected state.
-        await tester.pumpFrames(app, const Duration(milliseconds: 100));
+        serviceManager.changeState(true);
+        await pumpInitializer(tester);
         expect(find.byKey(initializedKey), findsOneWidget);
         expect(find.text('Disconnected'), findsNothing);
 
         // Trigger a disconnect.
         serviceManager.changeState(false);
+        await tester.pumpAndSettle(const Duration(microseconds: 1000));
 
         // Expect Disconnected overlay.
-        await tester.pumpFrames(app, const Duration(milliseconds: 100));
         expect(find.text('Disconnected'), findsOneWidget);
       },
     );
@@ -75,28 +77,23 @@ void main() {
         final serviceManager = FakeServiceManager();
         setGlobal(ServiceConnectionManager, serviceManager);
 
+        // Expect standard connected state.
+        serviceManager.changeState(true);
+        await pumpInitializer(tester);
+        expect(find.byKey(initializedKey), findsOneWidget);
+        expect(find.text('Disconnected'), findsNothing);
+
         // Trigger a disconnect and ensure the overlay appears.
-        await tester.pumpFrames(app, const Duration(milliseconds: 100));
         serviceManager.changeState(false);
-        await tester.pumpFrames(app, const Duration(milliseconds: 100));
+        await tester.pumpAndSettle();
         expect(find.text('Disconnected'), findsOneWidget);
 
         // Trigger a reconnect
         serviceManager.changeState(true);
+        await tester.pumpAndSettle();
 
         // Expect no overlay.
-        await tester.pumpFrames(app, const Duration(milliseconds: 100));
-        expect(find.text('Disconnected'), findsNothing);
-      },
-    );
-
-    testWidgets(
-      'builds contents when initialized',
-      (WidgetTester tester) async {
-        await tester.pumpWidget(app);
-        await tester.pumpAndSettle();
         expect(find.text('Disconnected'), findsNothing);
-        expect(find.byKey(initializedKey), findsOneWidget);
       },
     );
   });