from kivymd.tests.base_test import BaseTest class TabTest(BaseTest): def test_tab_raw_app(self): from kivymd.uix.floatlayout import MDFloatLayout from kivymd.uix.tab import MDTabs, MDTabsBase class Tab(MDFloatLayout, MDTabsBase): pass tab = MDTabs() tab.add_widget(Tab(title="Tab")) self.render(tab)