diff --git a/tape/dynamic_test.go b/tape/dynamic_test.go
index d942757..81918f0 100644
--- a/tape/dynamic_test.go
+++ b/tape/dynamic_test.go
@@ -70,6 +70,8 @@ func TestEncodeDecodeAnyTable(test *testing.T) {
 	err := testEncodeDecodeAny(test, map[uint16] any {
 		0xF3B9: uint32(1),
 		0x0102: uint32(2),
+		0x0103: int64(23432),
+		0x0104: int64(-88777),
 		0x0000: []byte("hi!"),
 		0xFFFF: []uint16 { 0xBEE5, 0x7777 },
 		0x1234: [][]uint16 { []uint16 { 0x5 }, []uint16 { 0x17, 0xAAAA} },