diff --git a/test/mrstub/app/nginx.conf b/test/mrstub/app/nginx.conf
index 60b1dd9..c548e56 100644
--- a/test/mrstub/app/nginx.conf
+++ b/test/mrstub/app/nginx.conf
@@ -28,10 +28,10 @@
     default_type application/octet-stream;
 
     server { # simple reverse-proxy
-        listen      3905;
-        listen      [::]:3905;
-        listen      3906 ssl;
-        listen      [::]:3906 ssl;
+        listen      3904;
+        listen      [::]:3904;
+        listen      3905 ssl;
+        listen      [::]:3905 ssl;
         server_name  localhost;
         ssl_certificate     /usr/src/app/cert/cert.crt;
         ssl_certificate_key /usr/src/app/cert/key.crt;