diff --git a/cinder/api/v3/volume_metadata.py b/cinder/api/v3/volume_metadata.py
index 37cd7787c9d..91f8d7d6f7a 100644
--- a/cinder/api/v3/volume_metadata.py
+++ b/cinder/api/v3/volume_metadata.py
@@ -24,7 +24,6 @@ import webob
 
 from cinder.api.openstack import wsgi
 from cinder.api.v2 import volume_metadata as volume_meta_v2
-from cinder import exception
 
 
 METADATA_MICRO_VERSION = '3.15'
@@ -43,36 +42,37 @@ class Controller(volume_meta_v2.Controller):
         checksum = hashlib.md5(data).hexdigest()
         return checksum in req.if_match.etags
 
-    def _ensure_min_version(self, req, allowed_version):
-        version = req.api_version_request
-        if not version.matches(allowed_version, None):
-            raise exception.VersionNotFoundForAPIMethod(version=version)
-
     @wsgi.extends
     def index(self, req, volume_id):
-        self._ensure_min_version(req, METADATA_MICRO_VERSION)
+        req_version = req.api_version_request
         metadata = super(Controller, self).index(req, volume_id)
-        resp = webob.Response()
-        data = jsonutils.dumps(metadata)
-        if six.PY3:
-            data = data.encode('utf-8')
-        resp.headers['Etag'] = hashlib.md5(data).hexdigest()
-        resp.body = data
-        return resp
+        if req_version.matches(METADATA_MICRO_VERSION):
+            data = jsonutils.dumps(metadata)
+            if six.PY3:
+                data = data.encode('utf-8')
+            resp = webob.Response()
+            resp.headers['Etag'] = hashlib.md5(data).hexdigest()
+            resp.body = data
+            return resp
+        return metadata
 
     @wsgi.extends
     def update(self, req, volume_id, id, body):
-        self._ensure_min_version(req, METADATA_MICRO_VERSION)
-        if not self._validate_etag(req, volume_id):
-            return webob.Response(status_int=http_client.PRECONDITION_FAILED)
+        req_version = req.api_version_request
+        if req_version.matches(METADATA_MICRO_VERSION):
+            if not self._validate_etag(req, volume_id):
+                return webob.Response(
+                    status_int=http_client.PRECONDITION_FAILED)
         return super(Controller, self).update(req, volume_id,
                                               id, body)
 
     @wsgi.extends
     def update_all(self, req, volume_id, body):
-        self._ensure_min_version(req, METADATA_MICRO_VERSION)
-        if not self._validate_etag(req, volume_id):
-            return webob.Response(status_int=http_client.PRECONDITION_FAILED)
+        req_version = req.api_version_request
+        if req_version.matches(METADATA_MICRO_VERSION):
+            if not self._validate_etag(req, volume_id):
+                return webob.Response(
+                    status_int=http_client.PRECONDITION_FAILED)
         return super(Controller, self).update_all(req, volume_id,
                                                   body)
 
diff --git a/cinder/tests/unit/api/v2/test_volume_metadata.py b/cinder/tests/unit/api/v2/test_volume_metadata.py
index b0730001efa..2689022763a 100644
--- a/cinder/tests/unit/api/v2/test_volume_metadata.py
+++ b/cinder/tests/unit/api/v2/test_volume_metadata.py
@@ -108,10 +108,10 @@ def return_volume_nonexistent(*args, **kwargs):
     raise exception.VolumeNotFound('bogus test message')
 
 
-class volumeMetaDataTest(test.TestCase):
+class VolumeMetaDataTest(test.TestCase):
 
     def setUp(self):
-        super(volumeMetaDataTest, self).setUp()
+        super(VolumeMetaDataTest, self).setUp()
         self.volume_api = volume_api.API()
         self.mock_object(volume.api.API, 'get', get_volume)
         self.mock_object(db, 'volume_metadata_get',
diff --git a/cinder/tests/unit/api/v3/test_volume_metadata.py b/cinder/tests/unit/api/v3/test_volume_metadata.py
index 80864755340..a1ac313f962 100644
--- a/cinder/tests/unit/api/v3/test_volume_metadata.py
+++ b/cinder/tests/unit/api/v3/test_volume_metadata.py
@@ -1,6 +1,3 @@
-# Copyright 2016 OpenStack Foundation.
-# All Rights Reserved.
-#
 #    Licensed under the Apache License, Version 2.0 (the "License"); you may
 #    not use this file except in compliance with the License. You may obtain
 #    a copy of the License at
@@ -28,6 +25,7 @@ from cinder import exception
 from cinder import test
 from cinder.tests.unit.api import fakes
 from cinder.tests.unit.api.v2 import fakes as v2_fakes
+from cinder.tests.unit.api.v2 import test_volume_metadata as v2_test
 from cinder.tests.unit import fake_constants as fake
 from cinder.tests.unit import fake_volume
 from cinder import volume
@@ -119,10 +117,10 @@ def fake_update_volume_metadata(self, context, volume, diff):
     pass
 
 
-class volumeMetaDataTest(test.TestCase):
+class VolumeMetaDataTest(test.TestCase):
 
     def setUp(self):
-        super(volumeMetaDataTest, self).setUp()
+        super(VolumeMetaDataTest, self).setUp()
         self.volume_api = volume_api.API()
         self.mock_object(volume.api.API, 'get', get_volume)
         self.mock_object(db, 'volume_metadata_get',
@@ -139,7 +137,7 @@ class volumeMetaDataTest(test.TestCase):
         self.volume_controller = volumes.VolumeController(self.ext_mgr)
         self.controller = volume_metadata.Controller()
         self.req_id = str(uuid.uuid4())
-        self.url = '/v2/%s/volumes/%s/metadata' % (
+        self.url = '/v3/%s/volumes/%s/metadata' % (
             fake.PROJECT_ID, self.req_id)
 
         vol = {"size": 100,
@@ -255,3 +253,14 @@ class volumeMetaDataTest(test.TestCase):
 
         self.assertRaises(webob.exc.HTTPBadRequest,
                           self.controller.create, req, self.req_id, body)
+
+
+class VolumeMetaDataTestNoMicroversion(v2_test.VolumeMetaDataTest):
+    """Volume metadata tests with no microversion provided."""
+
+    def setUp(self):
+        super(VolumeMetaDataTestNoMicroversion, self).setUp()
+        self.volume_controller = volumes.VolumeController(self.ext_mgr)
+        self.controller = volume_metadata.Controller()
+        self.url = '/v3/%s/volumes/%s/metadata' % (
+            fake.PROJECT_ID, self.req_id)