diff --git a/ip_addr.json b/ip_addr.json
index 187f5434557d80e8028197b3edf69fe7f37cfa5c..a700c5fb7f5f71480c816d5c26f1f56d3f88a586 100644
--- a/ip_addr.json
+++ b/ip_addr.json
@@ -1,4 +1,4 @@
 {
-    "0": "labostrex131",
-    "1": "labostrex132"
+    "0": "10.90.41.131",
+    "1": "10.90.41.132"
 }
\ No newline at end of file
diff --git a/testing.py b/testing.py
index fafca298f2a279192dcf62218201e9cf39e44ee0..5d487bd3a7914c7973c9f87322786478fa894d22 100644
--- a/testing.py
+++ b/testing.py
@@ -6,7 +6,8 @@ from decentralizepy.mappings.Linear import Linear
 
 def f(rank, m_id, total_procs, filePath, mapping):
     c = Communication(rank, m_id, total_procs, filePath, mapping)
-    c.connect_neighbours([i for i in range(total_procs) if i != rank])
+
+    c.connect_neighbours([i for i in range(total_procs) if i != mapping.get_uid(rank, m_id)])
     send = {}
     send["message"] = "Hi I am rank {}".format(rank)
     c.send((rank + 1) % total_procs, send)