diff --git a/zpay32/invoice_test.go b/zpay32/invoice_test.go
index 672253a3..d2d5068c 100644
--- a/zpay32/invoice_test.go
+++ b/zpay32/invoice_test.go
@@ -141,6 +141,14 @@ func TestDecodeEncode(t *testing.T) {
 			encodedInvoice: "lnbc1000000000m1", // invalid amount
 			valid:          false,
 		},
+		{
+			encodedInvoice: "lnbc20m1pvjluezhp58yjmdan79s6qqdhdzgynm4zwqd5d7xmw5fk98klysy043l2ahrqspp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqfqqepvrhrm9s57hejg0p662ur5j5cr03890fa7k2pypgttmh4897d3raaq85a293e9jpuqwl0rnfuwzam7yr8e690nd2ypcq9hlkdwdvycqjhlqg5", // empty fallback address field
+			valid:          false,
+		},
+		{
+			encodedInvoice: "lnbc20m1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqhp58yjmdan79s6qqdhdzgynm4zwqd5d7xmw5fk98klysy043l2ahrqsfpp3qjmp7lwpagxun9pygexvgpjdc4jdj85frqg00000000j9n4evl6mr5aj9f58zp6fyjzup6ywn3x6sk8akg5v4tgn2q8g4fhx05wf6juaxu9760yp46454gpg5mtzgerlzezqcqvjnhjh8z3g2qqsj5cgu", // invalid routing info length: not a multiple of 51
+			valid:          false,
+		},
 		{
 			// no payment hash set
 			encodedInvoice: "lnbc20m1pvjluezhp58yjmdan79s6qqdhdzgynm4zwqd5d7xmw5fk98klysy043l2ahrqsjv38luh6p6s2xrv3mzvlmzaya43376h0twal5ax0k6p47498hp3hnaymzhsn424rxqjs0q7apn26yrhaxltq3vzwpqj9nc2r3kzwccsplnq470",