1 files changed, 1 insertions, 0 deletions
diff --git a/packages/contract-wrappers/test/exchange_transfer_simulator_test.ts b/packages/contract-wrappers/test/exchange_transfer_simulator_test.ts
index b4ea91181..77c73ba8f 100644
--- a/packages/contract-wrappers/test/exchange_transfer_simulator_test.ts
+++ b/packages/contract-wrappers/test/exchange_transfer_simulator_test.ts
@@ -2,6 +2,7 @@ import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils';
 import { BlockParamLiteral, Token } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
+import 'make-promises-safe';
 
 import { ContractWrappers, ExchangeContractErrs } from '../src';
 import { TradeSide, TransferType } from '../src/types';