code: def test_running_on_ci_ci(monkeypatch):
      """Test running_on_ci run on CI machine returns True."""
      monkeypatch.setenv("JANITOR_CI_MACHINE", "1")
      assert running_on_ci() is True
  
label_desc: Use image node_id 2 for calling a global function with example usage: test_running_on_ci_ci(monkeypatch) without return types