diff --git a/contracts/integrations/CHANGELOG.json b/contracts/integrations/CHANGELOG.json
index 728bd9feff..4c7cba3f25 100644
--- a/contracts/integrations/CHANGELOG.json
+++ b/contracts/integrations/CHANGELOG.json
@@ -5,6 +5,10 @@
             {
                 "note": "Added ChainlinkStopLimit contract and tests",
                 "pr": 2473
+            },
+            {
+                "note": "Fixed the mainnet dYdX Bridge tests.",
+                "pr": 2479
             }
         ]
     },
diff --git a/contracts/integrations/contracts/test/TestDydxUser.sol b/contracts/integrations/contracts/test/TestDydxUser.sol
index cc0eb3bbb4..f57e85c6d2 100644
--- a/contracts/integrations/contracts/test/TestDydxUser.sol
+++ b/contracts/integrations/contracts/test/TestDydxUser.sol
@@ -130,7 +130,7 @@ interface IDydx {
 /// @dev Deploy this contract and call `init` to run the mainnet DydxBridge integration tests.
 contract TestDydxUser {
 
-    address public constant DYDX_BRIDGE_ADDRESS = 0x96DdBa19b69D6EA2549f6a12d005595167414744;
+    address public constant DYDX_BRIDGE_ADDRESS = 0x55dC8f21D20D4c6ED3C82916A438A413ca68e335;
     address public constant DYDX_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e;
     address public constant DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F;
     uint256 public constant DYDX_DAI_MARKET_ID = 3;
diff --git a/contracts/integrations/test/bridges/dydx_bridge_mainnet_test.ts b/contracts/integrations/test/bridges/dydx_bridge_mainnet_test.ts
index 62d8a66276..17b117a8f0 100644
--- a/contracts/integrations/test/bridges/dydx_bridge_mainnet_test.ts
+++ b/contracts/integrations/test/bridges/dydx_bridge_mainnet_test.ts
@@ -14,7 +14,7 @@ import { contractAddresses, dydxAccountOwner } from '../mainnet_fork_utils';
 
 import { dydxEvents } from './abi/dydxEvents';
 
-blockchainTests.fork.skip('Mainnet dydx bridge tests', env => {
+blockchainTests.fork.resets('Mainnet dydx bridge tests', env => {
     let testContract: DydxBridgeContract;
     // random account to receive tokens from dydx
     const receiver = '0x986ccf5234d9cfbb25246f1a5bfa51f4ccfcb308';
@@ -73,7 +73,7 @@ blockchainTests.fork.skip('Mainnet dydx bridge tests', env => {
                             accountOwner: dydxAccountOwner,
                             accountNumber: bridgeData.accountNumbers[action.accountId.toNumber()],
                             market: action.marketId,
-                            update: [[true, scaledAmount]],
+                            update: { deltaWei: { sign: true, value: scaledAmount } },
                             from: dydxAccountOwner,
                         });
                         break;
@@ -83,7 +83,7 @@ blockchainTests.fork.skip('Mainnet dydx bridge tests', env => {
                             accountOwner: dydxAccountOwner,
                             accountNumber: bridgeData.accountNumbers[action.accountId.toNumber()],
                             market: action.marketId,
-                            update: [[false, scaledAmount]],
+                            update: { deltaWei: { sign: false, value: scaledAmount } },
                             to: receiver,
                         });
                         break;
@@ -112,10 +112,10 @@ blockchainTests.fork.skip('Mainnet dydx bridge tests', env => {
                 expect(log.args.from, 'from').to.equal(expectedEvent.from);
                 // We only check the first update field because it's the delta balance (amount deposited).
                 // The next field is the new total, which depends on interest rates at the time of execution.
-                expect(log.args.update[0][0], 'update sign').to.equal(expectedEvent.update[0][0]);
-                const updateValueHex = log.args.update[0][1]._hex;
-                const updateValueBn = new BigNumber(updateValueHex, 16);
-                expect(updateValueBn, 'update value').to.bignumber.equal(expectedEvent.update[0][1]);
+                expect(log.args.update.deltaWei.sign, 'update sign').to.equal(expectedEvent.update.deltaWei.sign);
+                expect(log.args.update.deltaWei.value, 'update value').to.bignumber.equal(
+                    expectedEvent.update.deltaWei.value,
+                );
             }
         };
 
diff --git a/contracts/integrations/test/mainnet_fork_utils.ts b/contracts/integrations/test/mainnet_fork_utils.ts
index 77e1d5af7a..be69c87a63 100644
--- a/contracts/integrations/test/mainnet_fork_utils.ts
+++ b/contracts/integrations/test/mainnet_fork_utils.ts
@@ -3,7 +3,7 @@ import { ContractWrappers } from '@0x/contract-wrappers';
 import { Web3ProviderEngine } from '@0x/dev-utils';
 
 const chainId = 1;
-export const dydxAccountOwner = '0xeb58c2caa96f39626dcceb74fdbb7a9a8b54ec18';
+export const dydxAccountOwner = '0xfdac948232c5bfbe24b770326ee4dff7a8dd8484';
 export const contractAddresses = getContractAddressesForChainOrThrow(chainId);
 
 /**
diff --git a/contracts/test-utils/src/web3_wrapper.ts b/contracts/test-utils/src/web3_wrapper.ts
index 88b79d3017..1a4eed56e2 100644
--- a/contracts/test-utils/src/web3_wrapper.ts
+++ b/contracts/test-utils/src/web3_wrapper.ts
@@ -20,7 +20,11 @@ export let providerConfigs: Web3Config = {
     shouldUseInProcessGanache: true,
     shouldAllowUnlimitedContractSize: true,
     hardfork: 'istanbul',
-    unlocked_accounts: ['0x6cc5f688a315f3dc28a7781717a9a798a59fda7b', '0x55dc8f21d20d4c6ed3c82916a438a413ca68e335'],
+    unlocked_accounts: [
+        '0x6cc5f688a315f3dc28a7781717a9a798a59fda7b',
+        '0x55dc8f21d20d4c6ed3c82916a438a413ca68e335',
+        '0x8ed95d1746bf1e4dab58d8ed4724f1ef95b20db0', // ERC20BridgeProxy
+    ],
 };
 
 export const provider: Web3ProviderEngine = web3Factory.getRpcProvider(providerConfigs);