diff --git a/contracts/exchange-forwarder/test/forwarder.ts b/contracts/exchange-forwarder/test/forwarder.ts
index 400f944e98..fcc8a05ab1 100644
--- a/contracts/exchange-forwarder/test/forwarder.ts
+++ b/contracts/exchange-forwarder/test/forwarder.ts
@@ -445,7 +445,7 @@ describe(ContractName.Forwarder, () => {
                 takerAssetAmount: Web3Wrapper.toBaseUnitAmount(17, DECIMALS_DEFAULT),
             });
             await forwarderTestFactory.marketBuyTestAsync([order], 0.57, erc20Token, {
-                ethValueAdjustment: new BigNumber(2),
+                ethValueAdjustment: 2,
             });
         });
         it('should buy the exact amount of makerAsset from a single order with a WETH fee', async () => {
@@ -474,7 +474,7 @@ describe(ContractName.Forwarder, () => {
             );
 
             await forwarderTestFactory.marketBuyTestAsync([order], 0.5, erc20Token, {
-                ethValueAdjustment: new BigNumber(-2),
+                ethValueAdjustment: -2,
                 revertError,
             });
         });
@@ -725,7 +725,7 @@ describe(ContractName.Forwarder, () => {
 
              // -2 to compensate for the extra 1 wei added in ForwarderTestFactory to account for rounding
             await forwarderTestFactory.marketBuyTestAsync([order], 0.5, erc20Token, {
-                ethValueAdjustment: new BigNumber(-2),
+                ethValueAdjustment: -2,
                 forwarderFeePercentage,
                 revertError,
             });
diff --git a/contracts/exchange-forwarder/test/utils/forwarder_test_factory.ts b/contracts/exchange-forwarder/test/utils/forwarder_test_factory.ts
index 429a6b0b3d..2ea4c0ea79 100644
--- a/contracts/exchange-forwarder/test/utils/forwarder_test_factory.ts
+++ b/contracts/exchange-forwarder/test/utils/forwarder_test_factory.ts
@@ -149,13 +149,13 @@ export class ForwarderTestFactory {
         fractionalNumberOfOrdersToFill: number,
         makerAssetContract: DummyERC20TokenContract | DummyERC721TokenContract,
         options: {
-            ethValueAdjustment?: BigNumber; // Used to provided insufficient/excess ETH
+            ethValueAdjustment?: number; // Used to provided insufficient/excess ETH
             forwarderFeePercentage?: BigNumber;
             makerAssetId?: BigNumber;
             revertError?: RevertError;
         } = {},
     ): Promise<void> {
-        const ethValueAdjustment = options.ethValueAdjustment || constants.ZERO_AMOUNT;
+        const ethValueAdjustment = options.ethValueAdjustment || 0;
         const forwarderFeePercentage = options.forwarderFeePercentage || constants.ZERO_AMOUNT;
 
         const erc20Balances = await this._erc20Wrapper.getBalancesAsync();