diff --git a/tempest/api/volume/admin/test_volume_types_extra_specs.py b/tempest/api/volume/admin/test_volume_types_extra_specs.py
index b5a2fb7..730acdf 100644
--- a/tempest/api/volume/admin/test_volume_types_extra_specs.py
+++ b/tempest/api/volume/admin/test_volume_types_extra_specs.py
@@ -46,14 +46,32 @@
             self.volume_type['id'], extra_specs)['extra_specs']
         self.assertEqual(extra_specs, body,
                          "Volume type extra spec incorrectly created")
+
+        # Only update an extra spec
         spec_key = "spec2"
         extra_spec = {spec_key: "val2"}
         body = self.admin_volume_types_client.update_volume_type_extra_specs(
             self.volume_type['id'], spec_key, extra_spec)
         self.assertIn(spec_key, body)
+        self.assertEqual(extra_spec[spec_key], body[spec_key])
+        body = self.admin_volume_types_client.show_volume_type_extra_specs(
+            self.volume_type['id'], spec_key)
+        self.assertIn(spec_key, body)
         self.assertEqual(extra_spec[spec_key], body[spec_key],
                          "Volume type extra spec incorrectly updated")
 
+        # Update an existing extra spec and create a new extra spec
+        extra_specs = {spec_key: "val3", "spec4": "val4"}
+        body = self.admin_volume_types_client.create_volume_type_extra_specs(
+            self.volume_type['id'], extra_specs)['extra_specs']
+        self.assertEqual(extra_specs, body)
+        body = self.admin_volume_types_client.list_volume_types_extra_specs(
+            self.volume_type['id'])['extra_specs']
+        for key in extra_specs:
+            self.assertIn(key, body)
+            self.assertEqual(extra_specs[key], body[key],
+                             "Volume type extra spec incorrectly created")
+
     @decorators.idempotent_id('d4772798-601f-408a-b2a5-29e8a59d1220')
     def test_volume_type_extra_spec_create_get_delete(self):
         # Create/Get/Delete volume type extra spec.