diff --git a/lib/go/test/ServicesTest.thrift b/lib/go/test/ServicesTest.thrift
index 882b03a..666197f 100644
--- a/lib/go/test/ServicesTest.thrift
+++ b/lib/go/test/ServicesTest.thrift
@@ -107,5 +107,12 @@
     struct_a struct_a_func_2ex_1int_1s(1: i64 i, 2: string s) throws(1: moderate_disaster err1, 2:total_disaster err2)
 
     struct_a struct_a_func_1struct_a(1: struct_a st)
+}
 
+service container_test_parent {
+  void parent_only_func(1: set<i32> s)
+}
+
+service container_test extends container_test_parent {
+  void child_only_func(1: set<i32> s)
 }