diff --git a/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_alter.cfg b/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_alter.cfg
index e8956d8f4f..b46a0c3b44 100644
--- a/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_alter.cfg
+++ b/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_alter.cfg
@@ -36,6 +36,7 @@
             err_msg = cannot modify network device model from .* to .*
         - backend:
             extra_attrs = {'backend': {'tap': '/dev/net/tun', 'vhost': '/dev/vhost-net'}}
+            tmp_attrs = {'backend': None}
             update_attrs = {'backend': {'tap': '/dev/net/tun'}}
             err_msg = cannot modify network device backend settings
         - driver:
diff --git a/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_delete.cfg b/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_delete.cfg
index 07bd0d2903..faa80241ca 100644
--- a/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_delete.cfg
+++ b/libvirt/tests/cfg/virtual_network/update_device/unsupported_live_update_delete.cfg
@@ -27,10 +27,6 @@
             extra_attrs = {'rom': {'enabled': 'no'}}
             del_attr = rom
             err_msg = cannot modify network device rom enabled setting
-        - target_dev:
-            extra_attrs = {'target': {'dev': 'test'}}
-            del_attr = target
-            err_msg = cannot modify network device tap name
         - model_type:
             del_attr = model
             err_msg = cannot modify network device model from .* to .*
@@ -41,10 +37,6 @@
         - driver:
             del_attr = driver
             err_msg = cannot modify virtio network device driver attributes
-        - alias_name:
-            extra_attrs = {'alias': {'name': 'ua-47034d36-5483-411c-86f8-7989d08d762b'}}
-            del_attr = alias
-            err_msg = device not found: no device found at address .* matching MAC address .* and alias .*
         - mac:
             del_attr = mac_address
             err_msg = "cannot change network interface mac address|device not found"
diff --git a/libvirt/tests/src/virtual_network/update_device/unsupported_live_update.py b/libvirt/tests/src/virtual_network/update_device/unsupported_live_update.py
index e981f635ae..1211a3fb75 100644
--- a/libvirt/tests/src/virtual_network/update_device/unsupported_live_update.py
+++ b/libvirt/tests/src/virtual_network/update_device/unsupported_live_update.py
@@ -29,6 +29,7 @@ def run(test, params, env):
     iface_attrs = {**base_iface_attrs, **extra_attrs}
 
     update_attrs = eval(params.get('update_attrs', '{}'))
+    tmp_attrs = eval(params.get('tmp_attrs', '{}'))
     del_attr = params.get('del_attr')
 
     vmxml = vm_xml.VMXML.new_from_inactive_dumpxml(vm_name)
@@ -41,7 +42,6 @@ def run(test, params, env):
             vmxml.os = osxml
             libvirt_vmxml.modify_vm_device(vmxml, 'disk', {'boot': '1'})
 
-        vmxml.del_device('interface', by_tag=True)
         libvirt_vmxml.modify_vm_device(vmxml, 'interface', iface_attrs)
         LOG.debug(f'VMXML of {vm_name}:\n{virsh.dumpxml(vm_name).stdout_text}')
 
@@ -56,6 +56,8 @@ def run(test, params, env):
             else:
                 eval(f'iface.del_{del_attr}')()
         else:
+            if tmp_attrs:
+                iface.setup_attrs(**tmp_attrs)
             iface.setup_attrs(**update_attrs)
         LOG.debug(f'Interface xml to update with:\n{iface}')