diff --git a/tests/test_fe_form.py b/tests/test_fe_form.py
index eb72ae1..b7e1ed5 100644
--- a/tests/test_fe_form.py
+++ b/tests/test_fe_form.py
@@ -130,8 +130,8 @@ def test_invoicesimple_xml_signed(monkeypatch, simple_invoice):
         import helpers
         helpers.mock_urlopen(m)
         xml.add_extension(signer)
-        
-    elem = xml.find_or_create_element('/fe:Invoice/ext:UBLExtensions/ext:UBLExtension/ext:ExtensionContent/ds:Signature')
+
+    elem = xml.get_element('/fe:Invoice/ext:UBLExtensions/ext:UBLExtension[2]/ext:ExtensionContent/ds:Signature')
     assert elem.text is not None
 
 def test_invoicesimple_zip(simple_invoice):