Index: trunk/test/unit/org/openstreetmap/josm/data/validation/routines/UrlValidatorTest.java
===================================================================
--- trunk/test/unit/org/openstreetmap/josm/data/validation/routines/UrlValidatorTest.java	(revision 18895)
+++ trunk/test/unit/org/openstreetmap/josm/data/validation/routines/UrlValidatorTest.java	(revision 18896)
@@ -566,5 +566,6 @@
             new ResultPair("/..//file", false),
             new ResultPair("/test1//file", false),
-            new ResultPair("/projekte-und-themen/eulen-falken-und-deren-nistkästen/trafotürme", true)
+            // non-ascii characters are invalid for URIs. See https://datatracker.ietf.org/doc/html/rfc3986#section-1.2.1
+            new ResultPair("/projekte-und-themen/eulen-falken-und-deren-nistkästen/trafotürme", false)
     };