diff --git a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/expected.json b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/expected.json
index 4ab1a31..20975b2 100644
--- a/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/expected.json
+++ b/tests/czechlight-cfg-fs/data/v0_sdn-roadm-line_empty/expected.json
@@ -1,4 +1,36 @@
 {
+  "ietf-interfaces:interfaces": {
+    "interface": [
+      {
+        "ietf-ip:ipv4": {
+          "czechlight-network:dhcp-client": true
+        },
+        "ietf-ip:ipv6": {
+          "autoconf": {
+            "create-global-addresses": true
+          },
+          "enabled": true
+        },
+        "name": "br0",
+        "type": "iana-if-type:bridge"
+      },
+      {
+        "czechlight-network:bridge": "br0",
+        "name": "eth1",
+        "type": "iana-if-type:ethernetCsmacd"
+      },
+      {
+        "czechlight-network:bridge": "br0",
+        "name": "eth0",
+        "type": "iana-if-type:ethernetCsmacd"
+      },
+      {
+        "czechlight-network:bridge": "br0",
+        "name": "osc",
+        "type": "iana-if-type:ethernetCsmacd"
+      }
+    ]
+  },
   "czechlight-roadm-device:channel-plan": {
     "channel": [
       {