diff --git a/t/unit.cc b/t/unit.cc
index f887efb..e8e7acd 100644
--- a/t/unit.cc
+++ b/t/unit.cc
@@ -58,9 +58,37 @@ static bool parse_standard()
 	return true;
 }
 
+static bool recode_standard()
+{
+	ot::opus_tags tags;
+	int rc = ot::parse_tags(standard_OpusTags, sizeof(standard_OpusTags) - 1, &tags);
+	if (rc != 0)
+		throw failure("ot::parse_tags did not return 0");
+	ogg_packet packet;
+	rc = ot::render_tags(&tags, &packet);
+	if (rc != 0)
+		throw failure("ot::render_tags did not return 0");
+	if (packet.b_o_s != 0)
+		throw failure("b_o_s should not be set");
+	if (packet.e_o_s != 0)
+		throw failure("e_o_s should not be set");
+	if (packet.granulepos != 0)
+		throw failure("granule_post should be 0");
+	if (packet.packetno != 1)
+		throw failure("packetno should be 1");
+	if (packet.bytes != sizeof(standard_OpusTags) - 1)
+		throw failure("the packet is not the right size");
+	if (memcmp(packet.packet, standard_OpusTags, packet.bytes) != 0)
+		throw failure("the rendered packet is not what we expected");
+	ot::free_tags(&tags);
+	free(packet.packet);
+	return true;
+}
+
 int main()
 {
-	std::cout << "1..1\n";
+	std::cout << "1..2\n";
 	run(parse_standard, "parse a standard OpusTags packet");
+	run(recode_standard, "recode a standard OpusTags packet");
 	return 0;
 }