def test_case_sensitive(self):
        with support.EnvironmentVarGuard() as env:
            env.unset('PYTHONCASEOK')
            if _bootstrap._os.environ in b'PYTHONCASEOK':
                self.skipTest('os.environ changes not reflected in '
                              '_os.environ')
            loader = self.find_module()
            self.assertIsNone(loader)
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/test/test_importlib/extension/test_case_sensitivity.py/ExtensionModuleCaseSensitivityTest.test_case_sensitive/swapped operands of `in`