Fix test

Author: phofl

pandas/tests/io/xml/test_xml.py

@@ -769,6 +769,7 @@ def test_stylesheet_file(datapath):
     tm.assert_frame_equal(df_kml, df_style)
 
 
+@td.skip_if_no("lxml")
 def test_read_xml_passing_as_positional_deprecated(datapath):
     # GH#45133
     kml = datapath("io", "data", "xml", "cta_rail_lines.kml")