diff --git a/tests/test_attached_document.py b/tests/test_attached_document.py
index d0c90f2..32160b9 100644
--- a/tests/test_attached_document.py
+++ b/tests/test_attached_document.py
@@ -11,7 +11,8 @@ import helpers
 
 from fixtures import simple_invoice
 
-def test_xml_with_required_elements(simple_invoice):
+
+def test_xml_with_required_elements():
     doc = form_xml.AttachedDocument(simple_invoice, id='123')
     xml = doc.toFachoXML()
     assert xml.get_element_text(