Flutter integration_test - initialising and disposing dependencies

Question

I’m initializing the app like

void main() async {
  await Initializer.init();
  runApp(MyApp());
}

Initializer.init() initializes all dependencies like Firebase Analytics and register things like Hive TypeAdapters.

My sample tests look like:

void main() {
  IntegrationTestWidgetsFlutterBinding.ensureInitialized();
  testWidgets(
    'Sample',
    (WidgetTester tester) async {
      await Initializer.init();
      await tester.pumpWidget(MyApp());
      await tester.tap(find.text('Something'));
      expect(find.text('180 Results'), findsOneWidget);
    },
  );
  testWidgets(
    'Sample 2',
    (WidgetTester tester) async {
      await Initializer.init();
      await tester.pumpWidget(MyApp());
      await tester.tap(find.text('Something 2'));
      expect(find.text('180 Results'), findsOneWidget);
    },
  );
}

My problem is that after executing the first test, things that were initialized by Initializer.init() aren’t disposed correctly.

1. Is there a way to tell integration_test to reset the whole environment every time test is reloaded?

2. Shall I initialize things differently than static Initializer.init();

3. Shall I explicitly dispose/unregister all dependencies (sth like Initializer.dispose() at the end of every test)? That solution seems to be a nightmare since I'm using many 3rd parties that are not allowing explicit disposing.