diff --git a/test/machi_pb_high_client_test.erl b/test/machi_pb_high_client_test.erl
index 9d3875d..0af1dbc 100644
--- a/test/machi_pb_high_client_test.erl
+++ b/test/machi_pb_high_client_test.erl
@@ -74,9 +74,9 @@ smoke_test2() ->
             Size3 = iolist_size(Chunk3),
             ok = ?C:write_chunk(Clnt, File2, Off3, Chunk3, none),
 
-            Reads = [{Chunk1, File1, Off1, Size1},
-                     {Chunk2, File2, Off2, Size2},
-                     {Chunk3, File2, Off3, Size3}],
+            Reads = [{iolist_to_binary(Chunk1), File1, Off1, Size1},
+                     {iolist_to_binary(Chunk2), File2, Off2, Size2},
+                     {iolist_to_binary(Chunk3), File2, Off3, Size3}],
             [{ok, Ch} = ?C:read_chunk(Clnt, Fl, Off, Sz) ||
                 {Ch, Fl, Off, Sz} <- Reads],