diff --git a/tempest/services/volume/base/admin/base_types_client.py b/tempest/services/volume/base/admin/base_types_client.py
index afca752..fcb537e 100755
--- a/tempest/services/volume/base/admin/base_types_client.py
+++ b/tempest/services/volume/base/admin/base_types_client.py
@@ -68,7 +68,7 @@
         Available params: see http://developer.openstack.org/
                               api-ref-blockstorage-v2.html#showVolumeType
         """
-        url = "types/%s" % str(volume_id)
+        url = "types/%s" % volume_id
         resp, body = self.get(url)
         body = json.loads(body)
         self.expected_success(200, resp.status)
@@ -92,7 +92,7 @@
         Available params: see http://developer.openstack.org/
                               api-ref-blockstorage-v2.html#deleteVolumeType
         """
-        resp, body = self.delete("types/%s" % str(volume_id))
+        resp, body = self.delete("types/%s" % volume_id)
         self.expected_success(202, resp.status)
         return rest_client.ResponseBody(resp, body)
 
@@ -103,7 +103,7 @@
         After fixing the api-site, we need to fix here also for putting
         the link to api-site.
         """
-        url = 'types/%s/extra_specs' % str(vol_type_id)
+        url = 'types/%s/extra_specs' % vol_type_id
         if params:
             url += '?%s' % urllib.urlencode(params)
 
@@ -114,8 +114,7 @@
 
     def show_volume_type_extra_specs(self, vol_type_id, extra_specs_name):
         """Returns the details of a single volume_type extra spec."""
-        url = "types/%s/extra_specs/%s" % (str(vol_type_id),
-                                           str(extra_specs_name))
+        url = "types/%s/extra_specs/%s" % (vol_type_id, extra_specs_name)
         resp, body = self.get(url)
         body = json.loads(body)
         self.expected_success(200, resp.status)
@@ -127,7 +126,7 @@
         vol_type_id: Id of volume_type.
         extra_specs: A dictionary of values to be used as extra_specs.
         """
-        url = "types/%s/extra_specs" % str(vol_type_id)
+        url = "types/%s/extra_specs" % vol_type_id
         post_body = json.dumps({'extra_specs': extra_specs})
         resp, body = self.post(url, post_body)
         body = json.loads(body)
@@ -137,7 +136,7 @@
     def delete_volume_type_extra_specs(self, vol_id, extra_spec_name):
         """Deletes the Specified Volume_type extra spec."""
         resp, body = self.delete("types/%s/extra_specs/%s" % (
-            (str(vol_id)), str(extra_spec_name)))
+            vol_id, extra_spec_name))
         self.expected_success(202, resp.status)
         return rest_client.ResponseBody(resp, body)
 
@@ -153,8 +152,7 @@
                               api-ref-blockstorage-v2.html#
                               updateVolumeTypeExtraSpecs
         """
-        url = "types/%s/extra_specs/%s" % (str(vol_type_id),
-                                           str(extra_spec_name))
+        url = "types/%s/extra_specs/%s" % (vol_type_id, extra_spec_name)
         put_body = json.dumps(extra_specs)
         resp, body = self.put(url, put_body)
         body = json.loads(body)
@@ -166,7 +164,7 @@
 
         vol_type_id: Id of volume_type.
         """
-        url = "/types/%s/encryption" % str(vol_type_id)
+        url = "/types/%s/encryption" % vol_type_id
         resp, body = self.get(url)
         body = json.loads(body)
         self.expected_success(200, resp.status)
@@ -179,7 +177,7 @@
         After fixing the api-site, we need to fix here also for putting
         the link to api-site.
         """
-        url = "/types/%s/encryption" % str(vol_type_id)
+        url = "/types/%s/encryption" % vol_type_id
         post_body = json.dumps({'encryption': kwargs})
         resp, body = self.post(url, post_body)
         body = json.loads(body)
@@ -189,7 +187,7 @@
     def delete_encryption_type(self, vol_type_id):
         """Delete the encryption type for the specified volume-type."""
         resp, body = self.delete(
-            "/types/%s/encryption/provider" % str(vol_type_id))
+            "/types/%s/encryption/provider" % vol_type_id)
         self.expected_success(202, resp.status)
         return rest_client.ResponseBody(resp, body)