diff --git a/test/regress.rpc b/test/regress.rpc
new file mode 100644
index 00000000..7bc6b75d
--- /dev/null
+++ b/test/regress.rpc
@@ -0,0 +1,17 @@
+/* tests data packing and unpacking */
+
+struct msg {
+	string from_name = 1;
+	string to_name = 2;
+	optional struct[kill] kill = 3;
+	array struct[run] run = 4;
+}
+
+struct kill {
+	string weapon = 1;
+	string action = 2;
+}
+
+struct run {
+	string how = 1;
+}