diff --git a/tempest/api/network/base.py b/tempest/api/network/base.py
index f92ad68..eb2fd61 100644
--- a/tempest/api/network/base.py
+++ b/tempest/api/network/base.py
@@ -170,14 +170,22 @@
         return subnet
 
     @classmethod
-    def create_port(cls, network):
+    def create_port(cls, network, **kwargs):
         """Wrapper utility that returns a test port."""
-        resp, body = cls.client.create_port(network_id=network['id'])
+        resp, body = cls.client.create_port(network_id=network['id'],
+                                            **kwargs)
         port = body['port']
         cls.ports.append(port)
         return port
 
     @classmethod
+    def update_port(cls, port, **kwargs):
+        """Wrapper utility that updates a test port."""
+        resp, body = cls.client.update_port(port['id'],
+                                            **kwargs)
+        return body['port']
+
+    @classmethod
     def create_router(cls, router_name=None, admin_state_up=False,
                       external_network_id=None, enable_snat=None):
         ext_gw_info = {}
diff --git a/tempest/api/network/test_ports.py b/tempest/api/network/test_ports.py
index fbb25a8..535e05f 100644
--- a/tempest/api/network/test_ports.py
+++ b/tempest/api/network/test_ports.py
@@ -46,6 +46,8 @@
         resp, body = self.client.create_port(network_id=self.network['id'])
         self.assertEqual('201', resp['status'])
         port = body['port']
+        # Schedule port deletion with verification upon test completion
+        self.addCleanup(self._delete_port, port['id'])
         self.assertTrue(port['admin_state_up'])
         # Verify port update
         new_name = "New_Port"
@@ -57,9 +59,6 @@
         updated_port = body['port']
         self.assertEqual(updated_port['name'], new_name)
         self.assertFalse(updated_port['admin_state_up'])
-        # Verify port deletion
-        resp, body = self.client.delete_port(port['id'])
-        self.assertEqual('204', resp['status'])
 
     @test.attr(type='smoke')
     def test_show_port(self):
@@ -134,6 +133,29 @@
             self.assertEqual(len(port), 1)
             self.assertIn('id', port)
 
+    @test.attr(type='smoke')
+    def test_update_port_with_second_ip(self):
+        # Create a network with two subnets
+        network = self.create_network()
+        subnet_1 = self.create_subnet(network)
+        subnet_2 = self.create_subnet(network)
+        fixed_ip_1 = [{'subnet_id': subnet_1['id']}]
+        fixed_ip_2 = [{'subnet_id': subnet_2['id']}]
+
+        # Create a port with a single IP address from first subnet
+        port = self.create_port(network,
+                                fixed_ips=fixed_ip_1)
+        self.assertEqual(1, len(port['fixed_ips']))
+
+        # Update the port with a second IP address from second subnet
+        fixed_ips = fixed_ip_1 + fixed_ip_2
+        port = self.update_port(port, fixed_ips=fixed_ips)
+        self.assertEqual(2, len(port['fixed_ips']))
+
+        # Update the port to return to a single IP address
+        port = self.update_port(port, fixed_ips=fixed_ip_1)
+        self.assertEqual(1, len(port['fixed_ips']))
+
 
 class PortsTestXML(PortsTestJSON):
     _interface = 'xml'