diff --git a/contracts/test-utils/src/constants.ts b/contracts/test-utils/src/constants.ts
index 82ddf44ed8..3c10572ef1 100644
--- a/contracts/test-utils/src/constants.ts
+++ b/contracts/test-utils/src/constants.ts
@@ -68,4 +68,5 @@ export const constants = {
     ONE_ETHER: new BigNumber(1e18),
     EIP712_DOMAIN_NAME: '0x Protocol',
     EIP712_DOMAIN_VERSION: '3.0.0',
+    DEFAULT_GAS_PRICE: 1,
 };
diff --git a/contracts/test-utils/src/transaction_factory.ts b/contracts/test-utils/src/transaction_factory.ts
index 9f0b4e165b..ab387d38c6 100644
--- a/contracts/test-utils/src/transaction_factory.ts
+++ b/contracts/test-utils/src/transaction_factory.ts
@@ -4,6 +4,7 @@ import { BigNumber } from '@0x/utils';
 import * as ethUtil from 'ethereumjs-util';
 
 import { getLatestBlockTimestampAsync } from './block_timestamp';
+import { constants } from './constants';
 import { signingUtils } from './signing_utils';
 
 export class TransactionFactory {
@@ -34,6 +35,7 @@ export class TransactionFactory {
             signerAddress,
             data: customTransactionParams.data,
             expirationTimeSeconds: new BigNumber(currentBlockTimestamp).plus(tenMinutesInSeconds),
+            gasPrice: new BigNumber(constants.DEFAULT_GAS_PRICE),
             domain: {
                 verifyingContractAddress: this._exchangeAddress,
                 chainId: this._chainId,
diff --git a/contracts/test-utils/src/web3_wrapper.ts b/contracts/test-utils/src/web3_wrapper.ts
index b002c70efb..68669abfd8 100644
--- a/contracts/test-utils/src/web3_wrapper.ts
+++ b/contracts/test-utils/src/web3_wrapper.ts
@@ -4,6 +4,7 @@ import { logUtils } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as _ from 'lodash';
 
+import { constants } from './constants';
 import { coverage } from './coverage';
 import { profiler } from './profiler';
 import { revertTrace } from './revert_trace';
@@ -31,6 +32,7 @@ switch (process.env.TEST_PROVIDER) {
 const ganacheTxDefaults = {
     from: devConstants.TESTRPC_FIRST_ADDRESS,
     gas: devConstants.GAS_LIMIT,
+    gasPrice: constants.DEFAULT_GAS_PRICE,
 };
 const gethTxDefaults = {
     from: devConstants.TESTRPC_FIRST_ADDRESS,