Adjust the tests

packages/0x.js/test/exchange_transfer_simulator_test.ts

@@ -2,6 +2,7 @@ import * as chai from 'chai';
 import BigNumber from 'bignumber.js';
 import {chaiSetup} from './utils/chai_setup';
 import {web3Factory} from './utils/web3_factory';
+import {constants} from './utils/constants';
 import {ZeroEx, ExchangeContractErrs, Token} from '../src';
 import {TradeSide, TransferType} from '../src/types';
 import {BlockchainLifecycle} from './utils/blockchain_lifecycle';
@@ -13,7 +14,10 @@ const blockchainLifecycle = new BlockchainLifecycle();
 
 describe('ExchangeTransferSimulator', () => {
     const web3 = web3Factory.create();
-    const zeroEx = new ZeroEx(web3.currentProvider);
+    const config = {
+        networkId: constants.TESTRPC_NETWORK_ID,
+    };
+    const zeroEx = new ZeroEx(web3.currentProvider, config);
     const transferAmount = new BigNumber(5);
     let userAddresses: string[];
     let tokens: Token[];