diff --git a/lib/erl/test/test_client.erl b/lib/erl/test/test_client.erl
index db4d2d1..4e85c47 100644
--- a/lib/erl/test/test_client.erl
+++ b/lib/erl/test/test_client.erl
@@ -83,6 +83,7 @@
   {Client06, {ok, 0}}               = thrift_client:call(Client05, testI32, [0]),
   {Client07, {ok, -34359738368}}    = thrift_client:call(Client06, testI64, [-34359738368]),
   {Client08, {ok, -5.2098523}}      = thrift_client:call(Client07, testDouble, [-5.2098523]),
+  %% TODO: add testBinary() call
   {Client09, {ok, DemoXtruct}}      = thrift_client:call(Client08, testStruct, [DemoXtruct]),
   {Client10, {ok, DemoNest}}        = thrift_client:call(Client09, testNest, [DemoNest]),
   {Client11, {ok, DemoDict}}        = thrift_client:call(Client10, testMap, [DemoDict]),
diff --git a/lib/erl/test/test_server.erl b/lib/erl/test/test_server.erl
index a4145d6..77357ff 100644
--- a/lib/erl/test/test_server.erl
+++ b/lib/erl/test/test_server.erl
@@ -81,6 +81,10 @@
     io:format("testDouble: ~p~n", [Double]),
     {reply, Double};
 
+handle_function(testBinary, {S}) when is_binary(S) ->
+    io:format("testBinary: ~p~n", [S]),
+    {reply, S};
+
 handle_function(testStruct,
                 {Struct = #'Xtruct'{string_thing = String,
                                  byte_thing = Byte,