diff --git a/core-writer/test/test_ZmqRecvModule.cpp b/core-writer/test/test_ZmqRecvModule.cpp
index 45c0388..afb9b1d 100644
--- a/core-writer/test/test_ZmqRecvModule.cpp
+++ b/core-writer/test/test_ZmqRecvModule.cpp
@@ -14,11 +14,15 @@ void generate_stream(size_t n_messages)
     socket.bind("tcp://127.0.0.1:11000");
 
     string header = "{\"frame\": 0, \"shape\": [1,16], \"type\": \"uint8\"}";
-    unique_ptr<char[]> buffer(make_unique<char[]>(16));
+    zmq::const_buffer header_msg(header.c_str(), header.length());
+
+    size_t buffer_size = 16;
+    char buffer[buffer_size];
+    zmq::const_buffer buffer_msg(buffer, buffer_size);
 
     for (size_t i=0; i<n_messages; i++) {
-        socket.send(header.c_str(), header.length(), ZMQ_SNDMORE);
-        socket.send(buffer.get(), 16);
+        socket.send(header_msg, zmq::send_flags::sndmore);
+        socket.send(buffer_msg);
     }
 }