diff --git a/openstack/blockstorage/v1/apiversions/requests_test.go b/openstack/blockstorage/v1/apiversions/requests_test.go
index 15a7660..3a14c99 100644
--- a/openstack/blockstorage/v1/apiversions/requests_test.go
+++ b/openstack/blockstorage/v1/apiversions/requests_test.go
@@ -54,10 +54,7 @@
 	List(client.ServiceClient()).EachPage(func(page pagination.Page) (bool, error) {
 		count++
 		actual, err := ExtractAPIVersions(page)
-		if err != nil {
-			t.Errorf("Failed to extract API versions: %v", err)
-			return false, err
-		}
+		th.AssertNoErr(t, err)
 
 		expected := []APIVersion{
 			APIVersion{
@@ -77,9 +74,7 @@
 		return true, nil
 	})
 
-	if count != 1 {
-		t.Errorf("Expected 1 page, got %d", count)
-	}
+	th.AssertEquals(t, 1, count)
 }
 
 func TestAPIInfo(t *testing.T) {
@@ -129,9 +124,7 @@
 	})
 
 	actual, err := Get(client.ServiceClient(), "v1").Extract()
-	if err != nil {
-		t.Errorf("Failed to extract version: %v", err)
-	}
+	th.AssertNoErr(t, err)
 
 	expected := APIVersion{
 		ID:      "v1.0",
diff --git a/openstack/blockstorage/v1/apiversions/results.go b/openstack/blockstorage/v1/apiversions/results.go
index 854f8dd..79a89de 100644
--- a/openstack/blockstorage/v1/apiversions/results.go
+++ b/openstack/blockstorage/v1/apiversions/results.go
@@ -3,15 +3,13 @@
 import (
 	"github.com/gophercloud/gophercloud"
 	"github.com/gophercloud/gophercloud/pagination"
-
-	"github.com/mitchellh/mapstructure"
 )
 
 // APIVersion represents an API version for Cinder.
 type APIVersion struct {
-	ID      string `json:"id" mapstructure:"id"`           // unique identifier
-	Status  string `json:"status" mapstructure:"status"`   // current status
-	Updated string `json:"updated" mapstructure:"updated"` // date last updated
+	ID      string `json:"id"`      // unique identifier
+	Status  string `json:"status"`  // current status
+	Updated string `json:"updated"` // date last updated
 }
 
 // APIVersionPage is the page returned by a pager when traversing over a
@@ -23,22 +21,18 @@
 // IsEmpty checks whether an APIVersionPage struct is empty.
 func (r APIVersionPage) IsEmpty() (bool, error) {
 	is, err := ExtractAPIVersions(r)
-	if err != nil {
-		return true, err
-	}
-	return len(is) == 0, nil
+	return len(is) == 0, err
 }
 
 // ExtractAPIVersions takes a collection page, extracts all of the elements,
 // and returns them a slice of APIVersion structs. It is effectively a cast.
 func ExtractAPIVersions(page pagination.Page) ([]APIVersion, error) {
-	var resp struct {
-		Versions []APIVersion `mapstructure:"versions"`
+	r := page.(APIVersionPage)
+	var s struct {
+		Versions []APIVersion `json:"versions"`
 	}
-
-	err := mapstructure.Decode(page.(APIVersionPage).Body, &resp)
-
-	return resp.Versions, err
+	err := r.ExtractInto(&s)
+	return s.Versions, err
 }
 
 // GetResult represents the result of a get operation.
@@ -48,11 +42,9 @@
 
 // Extract is a function that accepts a result and extracts an API version resource.
 func (r GetResult) Extract() (*APIVersion, error) {
-	var resp struct {
-		Version *APIVersion `mapstructure:"version"`
+	var s struct {
+		Version *APIVersion `json:"version"`
 	}
-
-	err := mapstructure.Decode(r.Body, &resp)
-
-	return resp.Version, err
+	err := r.ExtractInto(&s)
+	return s.Version, err
 }