diff --git a/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts
index a3e1d0ca7d..4af7254bbc 100644
--- a/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/dutch_auction_wrapper.ts
@@ -71,8 +71,8 @@ export class DutchAuctionWrapper extends ContractWrapper {
             ['uint256', 'uint256'],
             dutchAuctionDetailsBuffer,
         );
-        const beginTimeSeconds = new BigNumber(`0x${beginTimeSecondsAsBN.toString()}`);
-        const beginAmount = new BigNumber(`0x${beginAmountAsBN.toString()}`);
+        const beginTimeSeconds = new BigNumber(beginTimeSecondsAsBN.toString());
+        const beginAmount = new BigNumber(beginAmountAsBN.toString());
         return {
             assetData,
             beginTimeSeconds,
diff --git a/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts b/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts
index aed73feac4..15936a2eed 100644
--- a/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts
+++ b/packages/contract-wrappers/test/dutch_auction_wrapper_test.ts
@@ -91,14 +91,15 @@ describe('DutchAuctionWrapper', () => {
     afterEach(async () => {
         await blockchainLifecycle.revertAsync();
     });
-    describe.only('.decodeDutchAuctionAssetData', () => {
-        it('encode and decode to the same values', async () => {
+    describe('.decodeDutchAuctionAssetData', () => {
+        it('decodes to the encoded values', async () => {
             const encodedAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
                 makerTokenAssetData,
                 auctionBeginTimeSeconds,
                 makerAssetAmount,
             );
             const decodedAssetData = DutchAuctionWrapper.decodeDutchAuctionData(encodedAssetData);
+            // tslint:disable-next-line:no-unnecessary-type-assertion
             const erc20AssetData = decodedAssetData.assetData as ERC20AssetData;
             expect(erc20AssetData.tokenAddress).to.eq(makerTokenAddress);
             expect(decodedAssetData.beginAmount).to.be.bignumber.eq(makerAssetAmount);