diff --git a/tempest/scenario/manager.py b/tempest/scenario/manager.py
index cabefc8..b87d342 100644
--- a/tempest/scenario/manager.py
+++ b/tempest/scenario/manager.py
@@ -222,26 +222,6 @@
         if create_kwargs is None:
             create_kwargs = {}
 
-        fixed_network_name = CONF.compute.fixed_network_name
-        if 'nics' not in create_kwargs and fixed_network_name:
-            _, networks = self.networks_client.list_networks()
-            # If several networks found, set the NetID on which to connect the
-            # server to avoid the following error "Multiple possible networks
-            # found, use a Network ID to be more specific."
-            # See Tempest #1250866
-            if len(networks) > 1:
-                for network in networks:
-                    if network['label'] == fixed_network_name:
-                        create_kwargs['nics'] = [{'net-id': network['id']}]
-                        break
-                # If we didn't find the network we were looking for :
-                else:
-                    msg = ("The network on which the NIC of the server must "
-                           "be connected can not be found : "
-                           "fixed_network_name=%s. Starting instance without "
-                           "specifying a network.") % fixed_network_name
-                    LOG.info(msg)
-
         LOG.debug("Creating a server (name: %s, image: %s, flavor: %s)",
                   name, image, flavor)
         _, server = self.servers_client.create_server(name, image, flavor,
diff --git a/tempest/scenario/test_network_advanced_server_ops.py b/tempest/scenario/test_network_advanced_server_ops.py
index c145551..84e1048 100644
--- a/tempest/scenario/test_network_advanced_server_ops.py
+++ b/tempest/scenario/test_network_advanced_server_ops.py
@@ -61,8 +61,8 @@
         network, subnet, router = self.create_networks()
         public_network_id = CONF.network.public_network_id
         create_kwargs = {
-            'nics': [
-                {'net-id': network.id},
+            'networks': [
+                {'uuid': network.id},
             ],
             'key_name': self.keypair['name'],
             'security_groups': [security_group],
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index e8dba6a..10dfb66 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -147,8 +147,8 @@
         self.keypairs[keypair['name']] = keypair
         security_groups = [self.security_group]
         create_kwargs = {
-            'nics': [
-                {'net-id': network.id},
+            'networks': [
+                {'uuid': network.id},
             ],
             'key_name': keypair['name'],
             'security_groups': security_groups,
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 520c232..20505eb 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -234,8 +234,8 @@
         if security_groups is None:
             security_groups = [tenant.security_groups['default']]
         create_kwargs = {
-            'nics': [
-                {'net-id': tenant.network.id},
+            'networks': [
+                {'uuid': tenant.network.id},
             ],
             'key_name': tenant.keypair['name'],
             'security_groups': security_groups,