diff --git a/tests/test_wikidatasync.py b/tests/test_wikidatasync.py
index 0f665a3..9a2a186 100644
--- a/tests/test_wikidatasync.py
+++ b/tests/test_wikidatasync.py
@@ -732,7 +732,7 @@ def test_get_all_ceur_authors(self):
             label="Stefan Decker",
             wikidata_id="Q54303353",
             orcid_id="0000-0001-6324-7164",
-            gnd_id=None,
+            gnd_id='173443443',
         )
         decker = authorsById.get("https://dblp.org/pid/d/StefanDecker")
         self.assertEqual(expected_decker, decker)