diff --git a/t/artificial/metadata.xml b/t/artificial/metadata.xml
index 4860f2f..0ac19ba 100644
--- a/t/artificial/metadata.xml
+++ b/t/artificial/metadata.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-model href="metadata.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
 
-<metadata docid="ART_0001" type="document" xmlns="http://ids-mannheim.de/ns/KorAP">
+<metadata docid="ART_ABC.0001" type="document" xmlns="http://ids-mannheim.de/ns/KorAP">
   <doc file="data.xml" />
   <!--
   <foundry name="corenlp" path="corenlp" />