diff --git a/selftests/unit/test_xunit.py b/selftests/unit/test_xunit.py
index 4267f1c3537f789c9fe157b3151a99bc2a1587b7..69819506e775290f4fc39c16c700a913f0517d46 100644
--- a/selftests/unit/test_xunit.py
+++ b/selftests/unit/test_xunit.py
@@ -91,8 +91,8 @@ class xUnitSucceedTest(unittest.TestCase):
             xmlschema = etree.XMLSchema(etree.parse(f))   # pylint: disable=I1101
         # pylint: disable=I1101
         self.assertTrue(xmlschema.validate(etree.parse(BytesIO(xml))),
-                        "Failed to validate against %s, content:\n%s" %
-                        (self.junit, xml))
+                        "Failed to validate against %s, content:\n%s\nerror log:\n%s" %
+                        (self.junit, xml, xmlschema.error_log))
 
     def test_max_test_log_size(self):
         log = tempfile.NamedTemporaryFile(dir=self.tmpdir, delete=False)