diff --git a/fuel_test/ci/ci_base.py b/fuel_test/ci/ci_base.py
index 432e62d2b4..1fae44bfa2 100644
--- a/fuel_test/ci/ci_base.py
+++ b/fuel_test/ci/ci_base.py
@@ -146,7 +146,6 @@ class CiBase(object):
         self.setup_master_node(master_remote, environment.nodes)
         self.setup_agent_nodes(environment.nodes)
         only_private_interface(self.quantum_nodes())
-        kill_dhcpclient(self.quantum_nodes())
         sleep(5)
         sign_all_node_certificates(master_remote)
         sleep(5)
diff --git a/fuel_test/helpers.py b/fuel_test/helpers.py
index ac1eb25da6..6dc2137dfb 100644
--- a/fuel_test/helpers.py
+++ b/fuel_test/helpers.py
@@ -450,6 +450,10 @@ def only_private_interface(nodes):
             write_config(remote, path, load(root('fuel_test', 'config', 'interfaces_quantum_ubuntu.config')))
         execute(remote, 'ifup eth0')
         execute(remote, 'dhclient eth1')
+        if OS_FAMILY == 'centos':
+            execute(remote, 'killall dhclient')
+        else:
+            execute(remote, 'killall dhclient3')
 
 
 def kill_dhcpclient(nodes):