diff --git a/openbsc/tests/mgcp/mgcp_test.c b/openbsc/tests/mgcp/mgcp_test.c
index 9777a4d..b93ce7e 100644
--- a/openbsc/tests/mgcp/mgcp_test.c
+++ b/openbsc/tests/mgcp/mgcp_test.c
@@ -605,7 +605,27 @@
 	{0.380000, 20, "\x80\x62\x00\x14\x00\x00\x8C\x58\x10\x20\x30\x40"
 		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
 	/* RTP: SeqNo=21, TS=36088 */
-	{0.380000, 20, "\x80\x62\x00\x14\x00\x00\x8C\xF8\x10\x20\x30\x40"
+	{0.380000, 20, "\x80\x62\x00\x15\x00\x00\x8C\xF8\x10\x20\x30\x40"
+		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
+	/* Repeat last packet */
+	/* RTP: SeqNo=21, TS=36088 */
+	{0.400000, 20, "\x80\x62\x00\x15\x00\x00\x8C\xF8\x10\x20\x30\x40"
+		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
+	/* RTP: SeqNo=22, TS=36248 */
+	{0.420000, 20, "\x80\x62\x00\x16\x00\x00\x8D\x98\x10\x20\x30\x40"
+		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
+	/* RTP: SeqNo=23, TS=36408 */
+	{0.440000, 20, "\x80\x62\x00\x17\x00\x00\x8E\x38\x10\x20\x30\x40"
+		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
+	/* Don't increment SeqNo but increment timestamp by 160 */
+	/* RTP: SeqNo=23, TS=36568 */
+	{0.460000, 20, "\x80\x62\x00\x17\x00\x00\x8E\xD8\x10\x20\x30\x40"
+		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
+	/* RTP: SeqNo=24, TS=36728 */
+	{0.480000, 20, "\x80\x62\x00\x18\x00\x00\x8F\x78\x10\x20\x30\x40"
+		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
+	/* RTP: SeqNo=25, TS=36888 */
+	{0.500000, 20, "\x80\x62\x00\x19\x00\x00\x90\x18\x10\x20\x30\x40"
 		       "\x01\x23\x45\x67\x89\xAB\xCD\xEF"},
 };