3 files changed, 4 insertions, 6 deletions
diff --git a/packages/order-watcher/src/order_watcher/expiration_watcher.ts b/packages/order-watcher/src/order_watcher/expiration_watcher.ts
index ec2c1ec35..31fda7dca 100644
--- a/packages/order-watcher/src/order_watcher/expiration_watcher.ts
+++ b/packages/order-watcher/src/order_watcher/expiration_watcher.ts
@@ -19,6 +19,8 @@ export class ExpirationWatcher {
     private _expirationMarginMs: number;
     private _orderExpirationCheckingIntervalIdIfExists?: NodeJS.Timer;
     constructor(expirationMarginIfExistsMs?: number, orderExpirationCheckingIntervalIfExistsMs?: number) {
+        this._orderExpirationCheckingIntervalMs =
+            orderExpirationCheckingIntervalIfExistsMs || DEFAULT_ORDER_EXPIRATION_CHECKING_INTERVAL_MS;
         this._expirationMarginMs = expirationMarginIfExistsMs || DEFAULT_EXPIRATION_MARGIN_MS;
         this._orderExpirationCheckingIntervalMs =
             expirationMarginIfExistsMs || DEFAULT_ORDER_EXPIRATION_CHECKING_INTERVAL_MS;
diff --git a/packages/order-watcher/src/order_watcher/order_watcher.ts b/packages/order-watcher/src/order_watcher/order_watcher.ts
index c1f6c9230..140aa341b 100644
--- a/packages/order-watcher/src/order_watcher/order_watcher.ts
+++ b/packages/order-watcher/src/order_watcher/order_watcher.ts
@@ -14,7 +14,7 @@ import {
     Provider,
     SignedOrder,
 } from '@0xproject/types';
-import { intervalUtils } from '@0xproject/utils';
+import { errorUtils, intervalUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
@@ -39,7 +39,6 @@ import {
 } from '../generated_contract_wrappers/token';
 import { OnOrderStateChangeCallback, OrderWatcherConfig, OrderWatcherError } from '../types';
 import { assert } from '../utils/assert';
-import { utils } from '../utils/utils';
 
 import { EventWatcher } from './event_watcher';
 import { ExpirationWatcher } from './expiration_watcher';
@@ -344,7 +343,7 @@ export class OrderWatcher {
                 return; // noop
 
             default:
-                throw utils.spawnSwitchErr('decodedLog.event', decodedLog.event);
+                throw errorUtils.spawnSwitchErr('decodedLog.event', decodedLog.event);
         }
     }
     private async _emitRevalidateOrdersAsync(orderHashes: string[]): Promise<void> {
diff --git a/packages/order-watcher/src/utils/utils.ts b/packages/order-watcher/src/utils/utils.ts
index d34f6b99f..087fc635e 100644
--- a/packages/order-watcher/src/utils/utils.ts
+++ b/packages/order-watcher/src/utils/utils.ts
@@ -1,9 +1,6 @@
 import { BigNumber } from '@0xproject/utils';
 
 export const utils = {
-    spawnSwitchErr(name: string, value: any): Error {
-        return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
-    },
     getCurrentUnixTimestampSec(): BigNumber {
         const milisecondsInASecond = 1000;
         return new BigNumber(Date.now() / milisecondsInASecond).round();