diff --git a/src/NetworkRT.cpp b/src/NetworkRT.cpp
index 9f53b06..6e86de1 100644
--- a/src/NetworkRT.cpp
+++ b/src/NetworkRT.cpp
@@ -595,7 +595,7 @@ ILayer* NetworkRT::convert_layer(ITensor *input, DeformConv2d *l) {
 
 bool NetworkRT::serialize(const char *filename) {
 
-    std::ofstream p(filename);
+    std::ofstream p(filename, std::ios::binary);
     if (!p) {
         FatalError("could not open plan output file");
         return false;
diff --git a/tests/darknet/yolo3.cpp b/tests/darknet/yolo3.cpp
index ea53b84..464c3cf 100644
--- a/tests/darknet/yolo3.cpp
+++ b/tests/darknet/yolo3.cpp
@@ -5,19 +5,19 @@
 #include "DarknetParser.h"
 
 int main() {
-    std::string bin_path  = "yolo3";
+    std::string bin_path  = "yolov3-sppx";
     std::vector<std::string> input_bins = { 
         bin_path + "/layers/input.bin"
     };
     std::vector<std::string> output_bins = {
-        bin_path + "/debug/layer82_out.bin",
-        bin_path + "/debug/layer94_out.bin",
-        bin_path + "/debug/layer106_out.bin"
+        bin_path + "/debug/layer89_out.bin",
+        bin_path + "/debug/layer101_out.bin",
+        bin_path + "/debug/layer113_out.bin"
     };
     std::string wgs_path  = bin_path + "/layers";
-    std::string cfg_path  = "../tests/darknet/cfg/yolo3.cfg";
-    std::string name_path = "../tests/darknet/names/coco.names";
-    downloadWeightsifDoNotExist(input_bins[0], bin_path, "https://cloud.hipert.unimore.it/s/jPXmHyptpLoNdNR/download");
+    std::string cfg_path  = "../tests/darknet/cfg/yolov3-sppx.cfg";
+    std::string name_path = "../tests/darknet/names/coco4.names";
+    //downloadWeightsifDoNotExist(input_bins[0], bin_path, "https://cloud.hipert.unimore.it/s/jPXmHyptpLoNdNR/download");
 
     // parse darknet network
     tk::dnn::Network *net = tk::dnn::darknetParser(cfg_path, wgs_path, name_path);