Use gophercloud.Result in objectstorage.
diff --git a/openstack/objectstorage/v1/accounts/requests_test.go b/openstack/objectstorage/v1/accounts/requests_test.go
index 0090eea..d109214 100644
--- a/openstack/objectstorage/v1/accounts/requests_test.go
+++ b/openstack/objectstorage/v1/accounts/requests_test.go
@@ -27,10 +27,8 @@
 	})
 
 	options := &UpdateOpts{Metadata: map[string]string{"gophercloud-test": "accounts"}}
-	_, err := Update(fake.ServiceClient(), options).ExtractHeaders()
-	if err != nil {
-		t.Fatalf("Unable to update account: %v", err)
-	}
+	_, err := Update(fake.ServiceClient(), options).Extract()
+	th.AssertNoErr(t, err)
 }
 
 func TestGetAccount(t *testing.T) {