diff --git a/test/examples/correct/testudinata_phylonym.json b/test/examples/correct/testudinata_phylonym.json
index 45552175..92060228 100644
--- a/test/examples/correct/testudinata_phylonym.json
+++ b/test/examples/correct/testudinata_phylonym.json
@@ -120,5 +120,5 @@
             ]
         }
     ],
-    "defaultNomenclaturalCodeURI": "http://purl.obolibrary.org/obo/NOMEN_0000107"
+    "defaultNomenclaturalCodeIRI": "http://rs.tdwg.org/ontology/voc/TaxonName#ICZN"
 }
diff --git a/test/examples/correct/testudinata_phylonym.jsonld b/test/examples/correct/testudinata_phylonym.jsonld
index e0144eb1..a4fe2cf0 100644
--- a/test/examples/correct/testudinata_phylonym.jsonld
+++ b/test/examples/correct/testudinata_phylonym.jsonld
@@ -129,7 +129,7 @@
       ]
     }
   ],
-  "defaultNomenclaturalCodeURI": "http://purl.obolibrary.org/obo/NOMEN_0000107",
+  "defaultNomenclaturalCodeIRI": "http://rs.tdwg.org/ontology/voc/TaxonName#ICZN",
   "@id": "http://example.org/phyx.js/example#",
   "@type": [
     "testcase:PhyloreferenceTestCase",