diff --git a/common/test/run-ip_port_parsing.c b/common/test/run-ip_port_parsing.c
index 10ae9be12e45..073b3a632c12 100644
--- a/common/test/run-ip_port_parsing.c
+++ b/common/test/run-ip_port_parsing.c
@@ -128,6 +128,7 @@ int main(int argc, char *argv[])
 	assert(is_dnsaddr("is-valid.3hostname123.com"));
 	assert(is_dnsaddr("just-a-hostname-with-dashes"));
 	assert(is_dnsaddr("lightningd_dest.underscore.allowed.in.hostname.part.com"));
+	assert(is_dnsaddr("punycode.xn--bcher-kva.valid.com"));
 	assert(!is_dnsaddr("UPPERCASE.invalid.com"));
 	assert(!is_dnsaddr("-.invalid.com"));
 	assert(!is_dnsaddr("invalid.-example.com"));