diff --git a/tests/hwsim/test_wmediumd.py b/tests/hwsim/test_wmediumd.py
index 1eba90811..68bd4e158 100644
--- a/tests/hwsim/test_wmediumd.py
+++ b/tests/hwsim/test_wmediumd.py
@@ -28,11 +28,16 @@ CFG2 = """
 ifaces :
 {
     ids = ["%s", "%s", "%s"];
+};
+
+model:
+{
+    type = "prob";
 
     links = (
-        (0, 1, 50),
-        (0, 2, 50),
-        (1, 2, -10)
+        (0, 1, 0.000000),
+        (0, 2, 0.000000),
+        (1, 2, 1.000000)
     );
 };
 """