Index: /trunk/test/unit/org/openstreetmap/josm/io/CertificateAmendmentTestIT.java
===================================================================
--- /trunk/test/unit/org/openstreetmap/josm/io/CertificateAmendmentTestIT.java	(revision 15145)
+++ /trunk/test/unit/org/openstreetmap/josm/io/CertificateAmendmentTestIT.java	(revision 15146)
@@ -61,7 +61,5 @@
     public void testLetsEncrypt() throws IOException {
         // signed by letsencrypt's own ISRG root
-        // (not included yet)
-        // TODO: they switched to cross-sign CA, re-enable it if ISRG root is used again
-        // connect("https://helloworld.letsencrypt.org", false);
+        connect("https://valid-isrgrootx1.letsencrypt.org", true);
         // signed by letsencrypt's cross-sign CA
         connect("https://letsencrypt.org", true);