diff --git a/common/test.py b/common/test.py
index ed1e254..0f8442b 100644
--- a/common/test.py
+++ b/common/test.py
@@ -172,6 +172,12 @@
             if net['name'] == net_name:
                 return net
 
+    def _get_subnet_by_version(self, network, ip_version=4):
+        for subnet_id in self.net['subnets']:
+            subnet_info = self.network_client.show_subnet(subnet_id)
+            if subnet_info['subnet']['ip_version'] == ip_version:
+                return subnet_id
+
     @staticmethod
     def _stack_output(stack, output_key):
         """Return a stack output value for a given key."""
diff --git a/scenario/scenario_base.py b/scenario/scenario_base.py
index dd25b89..dbd825b 100644
--- a/scenario/scenario_base.py
+++ b/scenario/scenario_base.py
@@ -25,6 +25,7 @@
         if not self.conf.fixed_network_name:
             raise self.skipException("No default network configured to test")
         self.net = self._get_network()
+        self.subnet_v4 = self._get_subnet_by_version(self.net)
 
         if not self.conf.image_ref:
             raise self.skipException("No image configured to test")
diff --git a/scenario/templates/test_neutron_loadbalancer.yaml b/scenario/templates/test_neutron_loadbalancer.yaml
index a8c4769..3014356 100644
--- a/scenario/templates/test_neutron_loadbalancer.yaml
+++ b/scenario/templates/test_neutron_loadbalancer.yaml
@@ -106,6 +106,8 @@
        floating_network: { get_param: external_network_id }
        port_id:
          { get_attr: [test_pool, vip, 'port_id'] }
+       fixed_ip_address:
+         { get_attr: [test_pool, vip, 'address'] }
 
   LBaaS:
     type: OS::Neutron::LoadBalancer
diff --git a/scenario/test_neutron_loadbalancer.py b/scenario/test_neutron_loadbalancer.py
index 1cb1c6f..2d852b3 100644
--- a/scenario/test_neutron_loadbalancer.py
+++ b/scenario/test_neutron_loadbalancer.py
@@ -55,7 +55,7 @@
             'key_name': self.keypair_name,
             'flavor': self.conf.minimal_instance_type,
             'image': self.conf.image_ref,
-            'private_subnet_id': self.net['subnets'][0],
+            'private_subnet_id': self.subnet_v4,
             'external_network_id': self.public_net['id'],
             'timeout': self.conf.build_timeout
         }
diff --git a/scenario/test_server_cfn_init.py b/scenario/test_server_cfn_init.py
index 8134713..b2650bb 100644
--- a/scenario/test_server_cfn_init.py
+++ b/scenario/test_server_cfn_init.py
@@ -91,11 +91,11 @@
                via generated keypair.
         """
         parameters = {
-            "key_name": self.keypair_name,
-            "flavor": self.conf.instance_type,
-            "image": self.conf.image_ref,
-            "timeout": self.conf.build_timeout,
-            "subnet": self.net["subnets"][0],
+            'key_name': self.keypair_name,
+            'flavor': self.conf.instance_type,
+            'image': self.conf.image_ref,
+            'timeout': self.conf.build_timeout,
+            'subnet': self.subnet_v4,
         }
 
         # Launch stack