{
			name: "empty instance_type w/ update_mask",
			update: &subscriptionsv1.UpdateEnterpriseSubscriptionRequest{
				Subscription: &subscriptionsv1.EnterpriseSubscription{
					Id: mockSubscriptionID,
					// All update-able values are zero
				},
				UpdateMask: &fieldmaskpb.FieldMask{Paths: []string{"instance_type"}},
			},
			// All update-able values should be set to their defaults explicitly
			wantUpdateOpts: autogold.Expect(subscriptions.UpsertSubscriptionOptions{
				InstanceType: &sql.NullString{
					String: "ENTERPRISE_SUBSCRIPTION_INSTANCE_TYPE_UNSPECIFIED",
					Valid:  true,
				},
				ForceUpdate: false,
			}),
		},