QJSEngine: Q_INVOKABLE method that returns pointer to subclass of QObject

[dimonomid]

Suppose I have some class that derives from QObject:

class MyTest : public QObject {
Q_OBJECT
   // ... 
};

class MyTest : public QObject {
Q_OBJECT
   // ... 
};

To copy to clipboard, switch view to plain text mode 

And I want to return pointer to this class from Q_INVOKABLE function, like this:

Q_INVOKABLE MyTest *createMyTest(){
      return new MyTest();
   }

Q_INVOKABLE MyTest *createMyTest(){
      return new MyTest();
   }

To copy to clipboard, switch view to plain text mode 

However, when I try to invoke this method from the script in QJSEngine, I get the following error:

Error: Unknown method return type: MyTest*

Error: Unknown method return type: MyTest*

To copy to clipboard, switch view to plain text mode 

If I make createMyTest() to return QObject* instead of MyTest*, it works. But of course this would force me to use casts, which I'd like to avoid. So, how to make it work with MyTest*?
Just by chance, I tried to declare metatype, as follows:

Q_DECLARE_METATYPE(MyTest*)

Q_DECLARE_METATYPE(MyTest*)

To copy to clipboard, switch view to plain text mode 

But this didn't help.
Thanks in advance.