diff --git a/test/OptionalRequiredTest.thrift b/test/OptionalRequiredTest.thrift
index dcdd0f2..a608898 100644
--- a/test/OptionalRequiredTest.thrift
+++ b/test/OptionalRequiredTest.thrift
@@ -80,3 +80,9 @@
   5: required binary req_bin;
   6: optional binary opt_bin;
 }
+
+struct Binaries {
+  4: binary bin;
+  5: required binary req_bin;
+  6: optional binary opt_bin;
+}