diff --git a/test/simulation/103-initstepslew b/test/simulation/103-initstepslew
index 89611f7..0d0352b 100755
--- a/test/simulation/103-initstepslew
+++ b/test/simulation/103-initstepslew
@@ -7,10 +7,7 @@ freq_offset=0.0
 wander=0.0
 limit=100
 
-# clknetsim requires source port (if bound) to match dest port
-client_server_options="port 124"
-client_conf="initstepslew 5 192.168.123.1
-port 124"
+client_conf="initstepslew 5 192.168.123.1"
 
 min_sync_time=15
 max_sync_time=30
diff --git a/test/simulation/111-knownclient b/test/simulation/111-knownclient
index 2d3887d..0230448 100755
--- a/test/simulation/111-knownclient
+++ b/test/simulation/111-knownclient
@@ -4,7 +4,9 @@
 
 test_start "reply to client configured as server"
 
-server_conf="server 192.168.123.2"
+server_conf="server 192.168.123.2
+acquisitionport 123"
+client_conf="acquisitionport 123"
 log_packets=1
 
 run_test || test_fail
diff --git a/test/simulation/test.common b/test/simulation/test.common
index a6cde3c..1a43138 100644
--- a/test/simulation/test.common
+++ b/test/simulation/test.common
@@ -18,7 +18,7 @@ export PATH=../../:$PATH
 export CLKNETSIM_PATH=clknetsim
 
 # Known working clknetsim revision
-clknetsim_revision=eb0b85335c40027ac941b2276142542fff482107
+clknetsim_revision=c25faaf0a08e33e281bf33b209f4e295624b28b2
 clknetsim_url=https://github.com/mlichvar/clknetsim/archive/$clknetsim_revision.tar.gz
 
 # Only Linux is supported