diff --git a/openstack/blockstorage/extensions/volumetenants/results.go b/openstack/blockstorage/extensions/volumetenants/results.go
index 0d4c670..b7d51c7 100644
--- a/openstack/blockstorage/extensions/volumetenants/results.go
+++ b/openstack/blockstorage/extensions/volumetenants/results.go
@@ -1,7 +1,12 @@
 package volumetenants
 
-// An extension to the base Volume object
+// VolumeExt is an extension to the base Volume object
 type VolumeExt struct {
 	// TenantID is the id of the project that owns the volume.
 	TenantID string `json:"os-vol-tenant-attr:tenant_id"`
 }
+
+// UnmarshalJSON to override default
+func (r *VolumeExt) UnmarshalJSON(b []byte) error {
+	return nil
+}
diff --git a/openstack/blockstorage/v2/volumes/results.go b/openstack/blockstorage/v2/volumes/results.go
index 41fbf5c..674ec34 100644
--- a/openstack/blockstorage/v2/volumes/results.go
+++ b/openstack/blockstorage/v2/volumes/results.go
@@ -1,18 +1,38 @@
 package volumes
 
 import (
+	"encoding/json"
+	"time"
+
 	"github.com/gophercloud/gophercloud"
 	"github.com/gophercloud/gophercloud/pagination"
 )
 
 type Attachment struct {
-	AttachedAt   gophercloud.JSONRFC3339MilliNoZ `json:"attached_at"`
-	AttachmentID string                          `json:"attachment_id"`
-	Device       string                          `json:"device"`
-	HostName     string                          `json:"host_name"`
-	ID           string                          `json:"id"`
-	ServerID     string                          `json:"server_id"`
-	VolumeID     string                          `json:"volume_id"`
+	AttachedAt   time.Time `json:"-"`
+	AttachmentID string    `json:"attachment_id"`
+	Device       string    `json:"device"`
+	HostName     string    `json:"host_name"`
+	ID           string    `json:"id"`
+	ServerID     string    `json:"server_id"`
+	VolumeID     string    `json:"volume_id"`
+}
+
+func (r *Attachment) UnmarshalJSON(b []byte) error {
+	type tmp Attachment
+	var s struct {
+		tmp
+		AttachedAt gophercloud.JSONRFC3339MilliNoZ `json:"attached_at"`
+	}
+	err := json.Unmarshal(b, &s)
+	if err != nil {
+		return err
+	}
+	*r = Attachment(s.tmp)
+
+	r.AttachedAt = time.Time(s.AttachedAt)
+
+	return err
 }
 
 // Volume contains all the information associated with an OpenStack Volume.
@@ -26,9 +46,9 @@
 	// AvailabilityZone is which availability zone the volume is in.
 	AvailabilityZone string `json:"availability_zone"`
 	// The date when this volume was created.
-	CreatedAt gophercloud.JSONRFC3339MilliNoZ `json:"created_at"`
+	CreatedAt time.Time `json:"-"`
 	// The date when this volume was last updated
-	UpdatedAt gophercloud.JSONRFC3339MilliNoZ `json:"updated_at"`
+	UpdatedAt time.Time `json:"-"`
 	// Instances onto which the volume is attached.
 	Attachments []Attachment `json:"attachments"`
 	// Human-readable display name for the volume.
@@ -57,6 +77,25 @@
 	Multiattach bool `json:"multiattach"`
 }
 
+func (r *Volume) UnmarshalJSON(b []byte) error {
+	type tmp Volume
+	var s struct {
+		tmp
+		CreatedAt gophercloud.JSONRFC3339MilliNoZ `json:"created_at"`
+		UpdatedAt gophercloud.JSONRFC3339MilliNoZ `json:"updated_at"`
+	}
+	err := json.Unmarshal(b, &s)
+	if err != nil {
+		return err
+	}
+	*r = Volume(s.tmp)
+
+	r.CreatedAt = time.Time(s.CreatedAt)
+	r.UpdatedAt = time.Time(s.UpdatedAt)
+
+	return err
+}
+
 // VolumePage is a pagination.pager that is returned from a call to the List function.
 type VolumePage struct {
 	pagination.SinglePageBase
diff --git a/openstack/blockstorage/v2/volumes/testing/requests_test.go b/openstack/blockstorage/v2/volumes/testing/requests_test.go
index fd3dbcb..0a18544 100644
--- a/openstack/blockstorage/v2/volumes/testing/requests_test.go
+++ b/openstack/blockstorage/v2/volumes/testing/requests_test.go
@@ -4,7 +4,6 @@
 	"testing"
 	"time"
 
-	"github.com/gophercloud/gophercloud"
 	"github.com/gophercloud/gophercloud/openstack/blockstorage/extensions/volumetenants"
 	"github.com/gophercloud/gophercloud/openstack/blockstorage/v2/volumes"
 	"github.com/gophercloud/gophercloud/pagination"
@@ -35,7 +34,7 @@
 				Attachments: []volumes.Attachment{{
 					ServerID:     "83ec2e3b-4321-422b-8706-a84185f52a0a",
 					AttachmentID: "05551600-a936-4d4a-ba42-79a037c1-c91a",
-					AttachedAt:   gophercloud.JSONRFC3339MilliNoZ(time.Date(2016, 8, 6, 14, 48, 20, 0, time.UTC)),
+					AttachedAt:   time.Date(2016, 8, 6, 14, 48, 20, 0, time.UTC),
 					HostName:     "foobar",
 					VolumeID:     "d6cacb1a-8b59-4c88-ad90-d70ebb82bb75",
 					Device:       "/dev/vdc",
@@ -44,7 +43,7 @@
 				AvailabilityZone:   "nova",
 				Bootable:           "false",
 				ConsistencyGroupID: "",
-				CreatedAt:          gophercloud.JSONRFC3339MilliNoZ(time.Date(2015, 9, 17, 3, 35, 3, 0, time.UTC)),
+				CreatedAt:          time.Date(2015, 9, 17, 3, 35, 3, 0, time.UTC),
 				Description:        "",
 				Encrypted:          false,
 				Metadata:           map[string]string{"foo": "bar"},
@@ -67,7 +66,7 @@
 				AvailabilityZone:   "nova",
 				Bootable:           "false",
 				ConsistencyGroupID: "",
-				CreatedAt:          gophercloud.JSONRFC3339MilliNoZ(time.Date(2015, 9, 17, 3, 32, 29, 0, time.UTC)),
+				CreatedAt:          time.Date(2015, 9, 17, 3, 32, 29, 0, time.UTC),
 				Description:        "",
 				Encrypted:          false,
 				Metadata:           map[string]string{},
@@ -134,7 +133,7 @@
 			Attachments: []volumes.Attachment{{
 				ServerID:     "83ec2e3b-4321-422b-8706-a84185f52a0a",
 				AttachmentID: "05551600-a936-4d4a-ba42-79a037c1-c91a",
-				AttachedAt:   gophercloud.JSONRFC3339MilliNoZ(time.Date(2016, 8, 6, 14, 48, 20, 0, time.UTC)),
+				AttachedAt:   time.Date(2016, 8, 6, 14, 48, 20, 0, time.UTC),
 				HostName:     "foobar",
 				VolumeID:     "d6cacb1a-8b59-4c88-ad90-d70ebb82bb75",
 				Device:       "/dev/vdc",
@@ -143,7 +142,7 @@
 			AvailabilityZone:   "nova",
 			Bootable:           "false",
 			ConsistencyGroupID: "",
-			CreatedAt:          gophercloud.JSONRFC3339MilliNoZ(time.Date(2015, 9, 17, 3, 35, 3, 0, time.UTC)),
+			CreatedAt:          time.Date(2015, 9, 17, 3, 35, 3, 0, time.UTC),
 			Description:        "",
 			Encrypted:          false,
 			Metadata:           map[string]string{"foo": "bar"},
@@ -166,7 +165,7 @@
 			AvailabilityZone:   "nova",
 			Bootable:           "false",
 			ConsistencyGroupID: "",
-			CreatedAt:          gophercloud.JSONRFC3339MilliNoZ(time.Date(2015, 9, 17, 3, 32, 29, 0, time.UTC)),
+			CreatedAt:          time.Date(2015, 9, 17, 3, 32, 29, 0, time.UTC),
 			Description:        "",
 			Encrypted:          false,
 			Metadata:           map[string]string{},