diff --git a/tempest/api/network/test_networks_negative.py b/tempest/api/network/test_networks_negative.py
index 5dc1c21..94c3f9a 100644
--- a/tempest/api/network/test_networks_negative.py
+++ b/tempest/api/network/test_networks_negative.py
@@ -26,35 +26,35 @@
     @test.attr(type=['negative'])
     @test.idempotent_id('9293e937-824d-42d2-8d5b-e985ea67002a')
     def test_show_non_existent_network(self):
-        non_exist_id = data_utils.rand_name('network')
+        non_exist_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.show_network,
                           non_exist_id)
 
     @test.attr(type=['negative'])
     @test.idempotent_id('d746b40c-5e09-4043-99f7-cba1be8b70df')
     def test_show_non_existent_subnet(self):
-        non_exist_id = data_utils.rand_name('subnet')
+        non_exist_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.show_subnet,
                           non_exist_id)
 
     @test.attr(type=['negative'])
     @test.idempotent_id('a954861d-cbfd-44e8-b0a9-7fab111f235d')
     def test_show_non_existent_port(self):
-        non_exist_id = data_utils.rand_name('port')
+        non_exist_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.show_port,
                           non_exist_id)
 
     @test.attr(type=['negative'])
     @test.idempotent_id('98bfe4e3-574e-4012-8b17-b2647063de87')
     def test_update_non_existent_network(self):
-        non_exist_id = data_utils.rand_name('network')
+        non_exist_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.update_network,
                           non_exist_id, name="new_name")
 
     @test.attr(type=['negative'])
     @test.idempotent_id('03795047-4a94-4120-a0a1-bd376e36fd4e')
     def test_delete_non_existent_network(self):
-        non_exist_id = data_utils.rand_name('network')
+        non_exist_id = data_utils.rand_uuid()
         self.assertRaises(lib_exc.NotFound, self.client.delete_network,
                           non_exist_id)