diff --git a/ansible/main.yml b/ansible/main.yml
index 8319035..6520353 100644
--- a/ansible/main.yml
+++ b/ansible/main.yml
@@ -9,21 +9,31 @@
         beacon_node_network: 'testnet0',
         beacon_node_build_flavour: 'rlpx',
         beacon_node_total_nodes: 2,
+        beacon_node_running_nodes: 2,
         beacon_node_discovery_port: 9000,
         beacon_node_listening_port: 9000 }
     - { role: infra-role-beacon-node,
         beacon_node_network: 'testnet1',
         beacon_node_build_flavour: 'rlpx',
         beacon_node_total_nodes: 5,
+        beacon_node_running_nodes: 2,
         beacon_node_discovery_port: 9100,
         beacon_node_listening_port: 9100 }
 
 - name: Configure Nimbus cluster
   hosts: nimbus-slaves
   roles:
+    - { role: infra-role-beacon-node,
+        beacon_node_network: 'testnet0',
+        beacon_node_build_flavour: 'rlpx',
+        beacon_node_total_nodes: 2,
+        beacon_node_running_nodes: 2,
+        beacon_node_discovery_port: 9000,
+        beacon_node_listening_port: 9000 }
     - { role: infra-role-beacon-node,
         beacon_node_network: 'testnet1',
         beacon_node_build_flavour: 'rlpx',
         beacon_node_total_nodes: 10,
+        beacon_node_running_nodes: 2,
         beacon_node_discovery_port: 9100,
         beacon_node_listening_port: 9100 }