pyside2-uic still generates QString

I'm using pyside2-uic (on Windows) to generate a python file. But some QString are still generated though not supported in a Python3/Qt5 environment. It looks like it appears only when using a QTabWidget object.

Consequently, the pyside2-uic ends without error, but when running a Python program with the generated code, it logically fails (QString not supported).

Error message :

self.tabWidget.addTab(self.tab_options, QString())
NameError: name 'QString' is not defined

When I replace the 2 QString() with a python string (like "tab1", "tab2"), the Python program works well.

In attachment:

• Original .ui file (located in a qt folder in my project)
• Generated .py file (located in a qt folder in my project)
• main.py 

So I guess there is some issue when generating the .py file whith QTabWidget, still generating a QString object like in the older versions.