update unit and acceptance tests
diff --git a/openstack/blockstorage/v1/volumes/requests.go b/openstack/blockstorage/v1/volumes/requests.go
index 2a4ce91..7704012 100644
--- a/openstack/blockstorage/v1/volumes/requests.go
+++ b/openstack/blockstorage/v1/volumes/requests.go
@@ -60,7 +60,7 @@
 
 // ListOpts holds options for listing volumes. It is passed to the volumes.List function.
 type ListOpts struct {
-	// AllTenants is an admin-only option. Set it to true to see a tenant volumes.
+	// AllTenants is an admin-only option. Set it to true to see all tenant volumes.
 	AllTenants bool
 	// List only volumes that contain Metadata.
 	Metadata map[string]string
@@ -123,11 +123,10 @@
 
 }
 
-func Delete(client *gophercloud.ServiceClient, id string) DeleteResult {
-	var res DeleteResult
-	_, res.Err = perigee.Request("DELETE", deleteURL(client, id), perigee.Options{
+func Delete(client *gophercloud.ServiceClient, id string) error {
+	_, err := perigee.Request("DELETE", deleteURL(client, id), perigee.Options{
 		MoreHeaders: client.Provider.AuthenticatedHeaders(),
-		OkCodes:     []int{204},
+		OkCodes:     []int{202, 204},
 	})
-	return res
+	return err
 }
diff --git a/openstack/blockstorage/v1/volumes/requests_test.go b/openstack/blockstorage/v1/volumes/requests_test.go
index 2ae8dd3..54ff91d 100644
--- a/openstack/blockstorage/v1/volumes/requests_test.go
+++ b/openstack/blockstorage/v1/volumes/requests_test.go
@@ -155,6 +155,6 @@
 		w.WriteHeader(http.StatusNoContent)
 	})
 
-	res := Delete(ServiceClient(), "d32019d3-bc6e-4319-9c1d-6722fc136a22")
-	th.AssertNoErr(t, res.Err)
+	err := Delete(ServiceClient(), "d32019d3-bc6e-4319-9c1d-6722fc136a22")
+	th.AssertNoErr(t, err)
 }
diff --git a/openstack/blockstorage/v1/volumes/results.go b/openstack/blockstorage/v1/volumes/results.go
index 961582d..7bf83a5 100644
--- a/openstack/blockstorage/v1/volumes/results.go
+++ b/openstack/blockstorage/v1/volumes/results.go
@@ -80,5 +80,3 @@
 type UpdateResult struct {
 	commonResult
 }
-
-type DeleteResult commonResult