diff --git a/tests/ZMQMetadataSocketTest.cpp b/tests/ZMQMetadataSocketTest.cpp
index c7f16e22..67263be3 100644
--- a/tests/ZMQMetadataSocketTest.cpp
+++ b/tests/ZMQMetadataSocketTest.cpp
@@ -19,7 +19,7 @@ TEST_CASE("ZMQMetadataSocket","[ZeroMQ]") {
     // ensure sub socket is properly connected
     std::this_thread::sleep_for(std::chrono::seconds(2));
 
-    StartMessage start_message;
+    StartMessage start_message{};
     DataMessage data_message_0{.number = 0};
     DataMessage data_message_1{.number = 1};
     metadata_socket.StartDataCollection(start_message);