diff --git a/contracts/utils/test/lib_address.ts b/contracts/utils/test/lib_address.ts
index f5d3cd9302..a6a53c2252 100644
--- a/contracts/utils/test/lib_address.ts
+++ b/contracts/utils/test/lib_address.ts
@@ -16,11 +16,7 @@ describe('LibAddress', () => {
         await blockchainLifecycle.startAsync();
         nonContract = (await web3Wrapper.getAvailableAddressesAsync())[0];
         // Deploy LibAddress
-        lib = await TestLibAddressContract.deployFrom0xArtifactAsync(
-            artifacts.TestLibAddress,
-            provider,
-            txDefaults,
-        );
+        lib = await TestLibAddressContract.deployFrom0xArtifactAsync(artifacts.TestLibAddress, provider, txDefaults);
     });
 
     after(async () => {
diff --git a/contracts/utils/test/lib_eip712.ts b/contracts/utils/test/lib_eip712.ts
index 8aac0495b7..07bc5b9e96 100644
--- a/contracts/utils/test/lib_eip712.ts
+++ b/contracts/utils/test/lib_eip712.ts
@@ -52,12 +52,11 @@ async function testHashEIP712MessageAsync(
     domainHash: string,
     hashStruct: string,
 ): Promise<void> {
-    const input = '0x1901'.concat(domainHash.slice(2, domainHash.length).concat(hashStruct.slice(2, hashStruct.length)));
-    const expectedHash = '0x'.concat(ethUtil.sha3(input).toString('hex'));
-    const actualHash = await lib.externalHashEIP712Message.callAsync(
-        domainHash,
-        hashStruct,
+    const input = '0x1901'.concat(
+        domainHash.slice(2, domainHash.length).concat(hashStruct.slice(2, hashStruct.length)),
     );
+    const expectedHash = '0x'.concat(ethUtil.sha3(input).toString('hex'));
+    const actualHash = await lib.externalHashEIP712Message.callAsync(domainHash, hashStruct);
     expect(actualHash).to.be.eq(expectedHash);
 }
 
@@ -67,11 +66,7 @@ describe('LibEIP712', () => {
     before(async () => {
         await blockchainLifecycle.startAsync();
         // Deploy SafeMath
-        lib = await TestLibEIP712Contract.deployFrom0xArtifactAsync(
-            artifacts.TestLibEIP712,
-            provider,
-            txDefaults,
-        );
+        lib = await TestLibEIP712Contract.deployFrom0xArtifactAsync(artifacts.TestLibEIP712, provider, txDefaults);
     });
 
     after(async () => {
@@ -80,13 +75,7 @@ describe('LibEIP712', () => {
 
     describe('_hashEIP712Domain', async () => {
         it('should correctly hash empty input', async () => {
-            await testHashEIP712DomainAsync(
-                lib,
-                '',
-                '',
-                0,
-                constants.NULL_ADDRESS,
-            );
+            await testHashEIP712DomainAsync(lib, '', '', 0, constants.NULL_ADDRESS);
         });
     });
 
@@ -97,11 +86,7 @@ describe('LibEIP712', () => {
             const actualHash = await lib.externalHashEIP712Message.callAsync(constants.NULL_BYTES32, constants.NULL_BYTES32);
             expect(actualHash).to.be.eq(expectedHash);
              */
-            await testHashEIP712MessageAsync(
-                lib,
-                constants.NULL_BYTES32,
-                constants.NULL_BYTES32,
-            );
+            await testHashEIP712MessageAsync(lib, constants.NULL_BYTES32, constants.NULL_BYTES32);
         });
     });
 });
diff --git a/contracts/utils/test/ownable.ts b/contracts/utils/test/ownable.ts
index 451f9632bc..8b7cafa754 100644
--- a/contracts/utils/test/ownable.ts
+++ b/contracts/utils/test/ownable.ts
@@ -22,11 +22,7 @@ describe('Ownable', () => {
         await blockchainLifecycle.startAsync();
         // Deploy SafeMath from the owner address
         txDefaults.from = owner;
-        ownable = await TestOwnableContract.deployFrom0xArtifactAsync(
-            artifacts.TestOwnable,
-            provider,
-            txDefaults,
-        );
+        ownable = await TestOwnableContract.deployFrom0xArtifactAsync(artifacts.TestOwnable, provider, txDefaults);
     });
 
     after(async () => {
@@ -36,10 +32,7 @@ describe('Ownable', () => {
     // tslint:disable:no-unused-expression
     describe('onlyOwner', () => {
         it('should throw if sender is not owner', async () => {
-            const expectedError = new OwnableRevertErrors.OnlyOwnerError(
-                nonOwner,
-                owner,
-            );
+            const expectedError = new OwnableRevertErrors.OnlyOwnerError(nonOwner, owner);
             return expect(ownable.externalOnlyOwner.callAsync({ from: nonOwner })).to.revertWith(expectedError);
         });
 
@@ -50,7 +43,8 @@ describe('Ownable', () => {
 
     describe('transferOwnership', () => {
         it('should not transfer ownership if the specified new owner is the zero address', async () => {
-            expect(ownable.transferOwnership.sendTransactionAsync(constants.NULL_ADDRESS, { from: owner })).to.be.fulfilled;
+            expect(ownable.transferOwnership.sendTransactionAsync(constants.NULL_ADDRESS, { from: owner })).to.be
+                .fulfilled;
             const updatedOwner = await ownable.owner.callAsync();
             expect(updatedOwner).to.be.eq(owner);
         });
diff --git a/contracts/utils/test/safe_math.ts b/contracts/utils/test/safe_math.ts
index ccbf0117e3..b5ae65b737 100644
--- a/contracts/utils/test/safe_math.ts
+++ b/contracts/utils/test/safe_math.ts
@@ -20,11 +20,7 @@ describe('SafeMath', () => {
     before(async () => {
         await blockchainLifecycle.startAsync();
         // Deploy SafeMath
-        safeMath = await TestSafeMathContract.deployFrom0xArtifactAsync(
-            artifacts.TestSafeMath,
-            provider,
-            txDefaults,
-        );
+        safeMath = await TestSafeMathContract.deployFrom0xArtifactAsync(artifacts.TestSafeMath, provider, txDefaults);
     });
 
     after(async () => {
@@ -53,7 +49,7 @@ describe('SafeMath', () => {
             return expect(safeMath.externalSafeMul.callAsync(a, b)).to.revertWith(expectedError);
         });
 
-        it('should calculate correct value for values that don\'t overflow', async () => {
+        it("should calculate correct value for values that don't overflow", async () => {
             const result = await safeMath.externalSafeMul.callAsync(toBN(15), toBN(13));
             expect(result).bignumber.to.be.eq(toBN(195));
         });
diff --git a/packages/utils/src/sign_typed_data_utils.ts b/packages/utils/src/sign_typed_data_utils.ts
index 824d8f8cc8..f923ec640d 100644
--- a/packages/utils/src/sign_typed_data_utils.ts
+++ b/packages/utils/src/sign_typed_data_utils.ts
@@ -1,11 +1,16 @@
-import { EIP712DomainWithDefaultSchema, EIP712Object, EIP712ObjectValue, EIP712TypedData, EIP712Types } from '@0x/types';
+import {
+    EIP712DomainWithDefaultSchema,
+    EIP712Object,
+    EIP712ObjectValue,
+    EIP712TypedData,
+    EIP712Types,
+} from '@0x/types';
 import * as ethUtil from 'ethereumjs-util';
 import * as ethers from 'ethers';
 import * as _ from 'lodash';
 
 import { BigNumber } from './configured_bignumber';
 
-
 export const signTypedDataUtils = {
     /**
      * Generates the EIP712 Typed Data hash for signing
@@ -39,7 +44,7 @@ export const signTypedDataUtils = {
                     { name: 'version', type: 'string' },
                     { name: 'chainId', type: 'uint256' },
                     { name: 'verifyingContractAddress', type: 'address' },
-                ]
+                ],
             } as EIP712Types,
         );
     },