diff --git a/ansible/roles/test/tasks/ptf_runner_reboot.yml b/ansible/roles/test/tasks/ptf_runner_reboot.yml
index ba809ad1eee..f614eb1dffa 100644
--- a/ansible/roles/test/tasks/ptf_runner_reboot.yml
+++ b/ansible/roles/test/tasks/ptf_runner_reboot.yml
@@ -61,7 +61,7 @@
         - ports_file=\"/tmp/ports.json\"
         - dut_mac='{{ dut_mac }}'
         - dut_vlan_ip='192.168.0.1'
-        - default_ip_range='192.168.0.0/16'
+        - default_ip_range='192.168.100.0/18'
         - vlan_ip_range='{{ vlan_ip_range }}'
         - lo_v6_prefix='{{ lo_v6_prefix }}'
         - arista_vms=\"['{{ vm_hosts | list | join("','") }}']\"