def _getusefixturesnames(self, node: nodes.Item) -> Iterator[str]:
        """Return the names of usefixtures fixtures applicable to node."""
        for marker_node, mark in node.iter_markers_with_node(name="usefixtures"):
            if not mark.args:
                marker_node.warn(
                    PytestWarning(
                        f"usefixtures() in {node.nodeid} without arguments has no effect"
                    )
                )
            yield from mark.args
Return the names of usefixtures fixtures applicable to node.
src/_pytest/fixtures.py