diff --git a/cli/test/containerlab/integrationtest.clab.tmpl.yml b/cli/test/containerlab/integrationtest.clab.tmpl.yml
index e94143c5e616f4eb29e3fee5a38825d16e069601..edc8cb65906eba80a93b725a45621ab8c57c9a72 100644
--- a/cli/test/containerlab/integrationtest.clab.tmpl.yml
+++ b/cli/test/containerlab/integrationtest.clab.tmpl.yml
@@ -3,7 +3,7 @@ name: @@CLAB_NAME@@
 
 mgmt:
   network: @@CLAB_NAME@@
-  ipv4-subnet: @@CLAB_MGMT_SUBNET@@
+  ipv4_subnet: @@CLAB_MGMT_SUBNET@@
 
 topology:
   kinds:
diff --git a/cli/test/containerlab/integrationtest_branch.clab.tmpl.yml b/cli/test/containerlab/integrationtest_branch.clab.tmpl.yml
index 40c1e3e21d9b9001e2774e28109c5c126b2de106..140b6bb0f37cc416359c51acf4ee9c29233b388e 100644
--- a/cli/test/containerlab/integrationtest_branch.clab.tmpl.yml
+++ b/cli/test/containerlab/integrationtest_branch.clab.tmpl.yml
@@ -3,7 +3,7 @@ name: @@CLAB_NAME@@
 
 mgmt:
   network: @@CLAB_NAME@@
-  ipv4-subnet: @@CLAB_MGMT_SUBNET@@
+  ipv4_subnet: @@CLAB_MGMT_SUBNET@@
 
 topology:
   kinds:
diff --git a/controller/test/containerlab/complex-1.0.clab.tmpl.yml b/controller/test/containerlab/complex-1.0.clab.tmpl.yml
index 470f399a8aaa2c4af9e4615066d565429378a6b0..cdec98b888e1aff0bd56b69cd863f10aa928ef21 100644
--- a/controller/test/containerlab/complex-1.0.clab.tmpl.yml
+++ b/controller/test/containerlab/complex-1.0.clab.tmpl.yml
@@ -3,7 +3,7 @@ name: @@CLAB_NAME@@
 
 mgmt:
   network: @@CLAB_NAME@@
-  ipv4-subnet: @@CLAB_MGMT_SUBNET@@
+  ipv4_subnet: @@CLAB_MGMT_SUBNET@@
 
 topology:
   nodes:
diff --git a/controller/test/containerlab/dev.clab.tmpl.yml b/controller/test/containerlab/dev.clab.tmpl.yml
index 97602dd09561d6ddf4050e3380a6e156241666fe..985bd75394a310f93eac3dc276bcd10274126700 100644
--- a/controller/test/containerlab/dev.clab.tmpl.yml
+++ b/controller/test/containerlab/dev.clab.tmpl.yml
@@ -3,7 +3,7 @@ name: @@CLAB_NAME@@
 
 mgmt:
   network: clab-@@CLAB_NAME@@
-  ipv4-subnet: @@CLAB_MGMT_SUBNET@@
+  ipv4_subnet: @@CLAB_MGMT_SUBNET@@
 
 topology:
   kinds:
diff --git a/controller/test/containerlab/int01.clab.tmpl.yml b/controller/test/containerlab/int01.clab.tmpl.yml
index 89f5900f9138f646e8f7117d8c16533c84cb9667..10512cce11f3c85331c695cfe5c7aed1dfff67f3 100644
--- a/controller/test/containerlab/int01.clab.tmpl.yml
+++ b/controller/test/containerlab/int01.clab.tmpl.yml
@@ -3,7 +3,7 @@ name: @@CLAB_NAME@@
 
 mgmt:
   network: @@CLAB_NAME@@
-  ipv4-subnet: @@CLAB_MGMT_SUBNET@@
+  ipv4_subnet: @@CLAB_MGMT_SUBNET@@
 
 topology:
   kinds: