diff --git a/lib/erl/test/multiplexing.thrift b/lib/erl/test/multiplexing.thrift
new file mode 100644
index 0000000..7c7994b
--- /dev/null
+++ b/lib/erl/test/multiplexing.thrift
@@ -0,0 +1,7 @@
+service Multiplexing_Calculator {
+    i32 add(1: i32 x, 2: i32 y)
+}
+
+service Multiplexing_WeatherReport {
+    double getTemperature()
+}