def METHOD_NAME(self, loader):
    app_conf_file_name = self.make_conf_file(loader.base_dir, "foo.yaml")
    mmp = MultiMapProxy(loader)
    app = mmp.proj_app("foo")
    # touch configuration file
    os.utime(app_conf_file_name, (time.time() + 10, time.time() + 10))
    # app was reloaded
    assert app is not mmp.proj_app("foo")