diff --git a/server/native_transport/test_co_gns_server_bridge.cpp b/server/native_transport/test_co_gns_server_bridge.cpp
index 959bc8d..dc658fd 100644
--- a/server/native_transport/test_co_gns_server_bridge.cpp
+++ b/server/native_transport/test_co_gns_server_bridge.cpp
@@ -6,6 +6,7 @@
 #include <cassert>
 #include <chrono>
 #include <cstdint>
+#include <cstdio>
 #include <optional>
 #include <string>
 #include <thread>
@@ -129,7 +130,11 @@ int main()
 {
     co_gns_server_handle server = nullptr;
     std::array<char, 256> error{};
-    assert(co_gns_server_create("127.0.0.1", 0, &server, error.data(), error.size()) == 1);
+    const int createResult = co_gns_server_create("127.0.0.1", 0, &server, error.data(), error.size());
+    if (createResult != 1) {
+        std::fprintf(stderr, "co_gns_server_create failed (rc=%d): %s\n", createResult, error.data());
+    }
+    assert(createResult == 1);
     assert(server != nullptr);
     const auto port = co_gns_server_local_port(server);
     assert(port != 0);