Testes pra mim não falham como no vídeo

Eu tentei até fazer um group com todos os testes desse arquivo, mas não falha de qualquer forma, mesmo teoricamente tendo chamado a mesma instância do mock.

void main() { final MockBankHttp httpMock = MockBankHttp(); group('Widget tests', () { testWidgets('My widget has a text "Spent" ', (tester) async { when(httpMock.dolarToReal()).thenAnswer((_) async => ('5')); await tester.pumpWidget(MaterialApp( home: BankInherited(child: Home(api: httpMock.dolarToReal())), )); final spentFinder = find.text('Spent'); expect(spentFinder, findsOneWidget); verify(httpMock.dolarToReal()).called(1); });

testWidgets("finds a LinearProgressIndicator", (tester) async {
  when(httpMock.dolarToReal()).thenAnswer((_) async => ('5'));
  await tester.pumpWidget(MaterialApp(
    home: BankInherited(child: Home(api: httpMock.dolarToReal())),
  ));

  expect(find.byType(LinearProgressIndicator), findsOneWidget);
  verify(httpMock.dolarToReal()).called(1);
});
testWidgets("finds an AccountStatus", (tester) async {
  when(httpMock.dolarToReal()).thenAnswer((_) async => ('5'));
  await tester.pumpWidget(MaterialApp(
    home: BankInherited(child: Home(api: httpMock.dolarToReal())),
  ));

  expect(find.byKey(const Key('testKey')), findsOneWidget);
  verify(httpMock.dolarToReal()).called(1);
});

testWidgets('finds 5 BoxCards', (tester) async {
  when(httpMock.dolarToReal()).thenAnswer((_) async => ('5'));
  await tester.pumpWidget(MaterialApp(
      home: BankInherited(child: Home(api: httpMock.dolarToReal()))));

  expect(find.byWidgetPredicate((widget) {
    if (widget is BoxCard) {
      return true;
    } else {
      return false;
    }
  }), findsNWidgets(5));
  verify(httpMock.dolarToReal()).called(1);
});

testWidgets('When deposit is tapped, it should raise earned to 10',
    (tester) async {
  when(httpMock.dolarToReal()).thenAnswer((_) async => ('5'));
  await tester.pumpWidget(MaterialApp(
    home: BankInherited(child: Home(api: httpMock.dolarToReal())),
  ));
  await tester.tap(find.text('Deposit'));
  await tester.tap(find.text('Earned'));
  await tester.pumpAndSettle();
  expect(find.text('\$10.0'), findsOneWidget);
  verify(httpMock.dolarToReal()).called(1);
});

testWidgets('Testing Mock Http dolarToReal', (tester) async {
  when(httpMock.dolarToReal()).thenAnswer((_) async => ('5'));
  await tester.pumpWidget(MaterialApp(
    home: BankInherited(child: Home(api: httpMock.dolarToReal())),
  ));
  verify(httpMock.dolarToReal()).called(1);
});

}); } aqui está toda a minha main, suponho que seja algo a ver com a versão do flutter? No momento estou usando a mais atual. Só queria confirmar se não tem nada de errado