diff --git a/tcp_tests/templates/underlay/mk22-lab-basic--user-data1604.yaml b/tcp_tests/templates/underlay/mk22-lab-basic--user-data1604.yaml
index 4ec3a67..ff6539a 100644
--- a/tcp_tests/templates/underlay/mk22-lab-basic--user-data1604.yaml
+++ b/tcp_tests/templates/underlay/mk22-lab-basic--user-data1604.yaml
@@ -86,7 +86,7 @@
    ########################################################
 
   write_files:
-   - path: /etc/network/interfaces.d/99-tcp-tests.cfg
+   - path: /etc/network/interfaces
      content: |
           auto ens3
           iface ens3 inet dhcp