diff --git a/qurator/modstool/tests/test_alto.py b/qurator/modstool/tests/test_alto.py
index 154c848..5853154 100644
--- a/qurator/modstool/tests/test_alto.py
+++ b/qurator/modstool/tests/test_alto.py
@@ -1,4 +1,4 @@
-import xml.etree.ElementTree as ET
+from lxml import etree as ET
 
 
 from qurator.modstool.alto4pandas import alto_to_dict
diff --git a/qurator/modstool/tests/test_mets.py b/qurator/modstool/tests/test_mets.py
index 315c7b6..6462050 100644
--- a/qurator/modstool/tests/test_mets.py
+++ b/qurator/modstool/tests/test_mets.py
@@ -1,4 +1,4 @@
-import xml.etree.ElementTree as ET
+from lxml import etree as ET
 
 
 from qurator.modstool.modstool import mets_to_dict
diff --git a/qurator/modstool/tests/test_modstool.py b/qurator/modstool/tests/test_modstool.py
index c31e3e8..34ccd5e 100644
--- a/qurator/modstool/tests/test_modstool.py
+++ b/qurator/modstool/tests/test_modstool.py
@@ -1,6 +1,6 @@
 from tkinter import W
+from lxml import etree as ET
 import pytest
-import xml.etree.ElementTree as ET
 
 
 from qurator.modstool.modstool import mods_to_dict