diff --git a/integration/testConfig.ts b/integration/testConfig.ts
index e0ee9fc..b27a214 100644
--- a/integration/testConfig.ts
+++ b/integration/testConfig.ts
@@ -3,12 +3,12 @@ import type { NativeEtherlinkToken, NativeTezosToken, ERC20EtherlinkToken, FA12T
 export interface TestTokens {
   readonly tezos: {
     tez: NativeTezosToken;
-    ctez: FA12TezosToken;
+    tzbtc: FA12TezosToken;
     usdt: FA2TezosToken;
   };
   readonly etherlink: {
     tez: NativeEtherlinkToken
-    ctez: ERC20EtherlinkToken;
+    tzbtc: ERC20EtherlinkToken;
     usdt: ERC20EtherlinkToken;
   };
 }
@@ -62,27 +62,27 @@ const createTestTokens = (): TestTokens => {
       tez: {
         type: 'native'
       },
-      ctez: {
+      tzbtc: {
         type: 'fa1.2',
-        address: 'KT1LpdETWYvPWCQTR2FEW6jE6dVqJqxYjdeW'
+        address: 'KT1Vq1toL9mQquJhCvVRbbcC8PbZJWM4bPui'
       },
       usdt: {
         type: 'fa2',
-        address: 'KT195Eb8T524v5VJ99ZzH2wpnPfQ2wJfMi6h',
-        tokenId: '42'
+        address: 'KT1K6uyg7cjNRoPkYw6SfyCm1f2tPLHfVUez',
+        tokenId: '0'
       }
     },
     etherlink: {
       tez: {
         type: 'native'
       },
-      ctez: {
+      tzbtc: {
         type: 'erc20',
         address: '0x87dcBf128677ba36E79D47dAf4eb4e51610e0150'
       },
       usdt: {
         type: 'erc20',
-        address: '0xcB5d40c6B1bdf5Cd51b3801351b0A68D101a561b'
+        address: '0x8554cD57C0C3E5Ab9d1782c9063279fA9bFA4680'
       }
     }
   };
diff --git a/integration/testHelpers.ts b/integration/testHelpers.ts
index b5bfa65..9440a55 100644
--- a/integration/testHelpers.ts
+++ b/integration/testHelpers.ts
@@ -47,7 +47,7 @@ export const createTestTokenBridge = ({ testConfig, tezosToolkit, etherlinkToolk
       {
         tezos: {
           ...testConfig.tokens.tezos.tez,
-          ticketHelperContractAddress: 'KT1DWVsu4Jtu2ficZ1qtNheGPunm5YVniegT'
+          ticketHelperContractAddress: 'KT1MJxf4KVN3sosR99VRG7WBbWTJtAyWUJt9'
         },
         etherlink: {
           ...testConfig.tokens.etherlink.tez,
@@ -55,19 +55,19 @@ export const createTestTokenBridge = ({ testConfig, tezosToolkit, etherlinkToolk
       },
       {
         tezos: {
-          ...testConfig.tokens.tezos.ctez,
-          ticketerContractAddress: 'KT1RvSp4yDKUABqWmv3pKGE9fA6iCGy7bqGh',
-          ticketHelperContractAddress: 'KT1DHLWJorW9WB6ztkx1XcoaJKWXeTu9yoR1'
+          ...testConfig.tokens.tezos.tzbtc,
+          ticketerContractAddress: 'KT1AAi4DCQiTUv5MYoXtdiFwUrPH3t3Yhkjo',
+          ticketHelperContractAddress: 'KT1FcXb4oFBWtUVbEa96Do4DfQZXn6878yu1'
         },
         etherlink: {
-          ...testConfig.tokens.etherlink.ctez
+          ...testConfig.tokens.etherlink.tzbtc
         }
       },
       {
         tezos: {
           ...testConfig.tokens.tezos.usdt,
-          ticketerContractAddress: 'KT1VybveLaWhpQHKph28WcGwSy1ud22KSEan',
-          ticketHelperContractAddress: 'KT1DNtHLr9T9zksZjZvQwgtx5XJwrW9wzETB'
+          ticketerContractAddress: 'KT1JT3T9jodxKchWEcwMtHzKTcM5pKD4phFp',
+          ticketHelperContractAddress: 'KT1G4athp6hNRmy65MdM1stv3bXXh82NEvCH'
         },
         etherlink: {
           ...testConfig.tokens.etherlink.usdt
@@ -194,7 +194,7 @@ export const expectFinishedDeposit = (
     etherlinkOperation: {
       blockId: expect.any(Number),
       hash: expect.stringMatching(etherlinkOperationRegex),
-      logIndex: expect.any(Number),
+      logIndex: params.etherlinkToken.type === 'native' ? null : expect.any(Number),
       amount: params.outAmount,
       token: params.etherlinkToken,
       timestamp: expect.any(String),
diff --git a/integration/tests/balances.test.ts b/integration/tests/balances.test.ts
index 8eed43b..034c057 100644
--- a/integration/tests/balances.test.ts
+++ b/integration/tests/balances.test.ts
@@ -40,10 +40,10 @@ describe('Balances', () => {
 
   test.each([
     () => [testTezosAccountAddress, tokens.tezos.tez] as const,
-    () => [testTezosAccountAddress, tokens.tezos.ctez] as const,
+    () => [testTezosAccountAddress, tokens.tezos.tzbtc] as const,
     () => [testTezosAccountAddress, tokens.tezos.usdt] as const,
     () => [testEtherlinkAccountAddress, tokens.etherlink.tez] as const,
-    () => [testEtherlinkAccountAddress, tokens.etherlink.ctez] as const,
+    () => [testEtherlinkAccountAddress, tokens.etherlink.tzbtc] as const,
     () => [testEtherlinkAccountAddress, tokens.etherlink.usdt] as const,
   ])('Get the balance for a specific address and token: %#', async getTestData => {
     const [address, token] = getTestData();
@@ -59,30 +59,30 @@ describe('Balances', () => {
 
   test.each([
     () => [testTezosAccountAddress, [tokens.tezos.tez], [tokens.tezos.tez]] as const,
-    () => [testTezosAccountAddress, [tokens.tezos.ctez], [tokens.tezos.ctez]] as const,
-    () => [testTezosAccountAddress, [tokens.tezos.ctez, tokens.tezos.usdt], [tokens.tezos.ctez, tokens.tezos.usdt]] as const,
+    () => [testTezosAccountAddress, [tokens.tezos.tzbtc], [tokens.tezos.tzbtc]] as const,
+    () => [testTezosAccountAddress, [tokens.tezos.tzbtc, tokens.tezos.usdt], [tokens.tezos.tzbtc, tokens.tezos.usdt]] as const,
     () => [
       testTezosAccountAddress,
-      [tokens.tezos.ctez, tokens.tezos.tez, tokens.tezos.usdt],
-      [tokens.tezos.tez, tokens.tezos.ctez, tokens.tezos.usdt]
+      [tokens.tezos.tzbtc, tokens.tezos.tez, tokens.tezos.usdt],
+      [tokens.tezos.tez, tokens.tezos.tzbtc, tokens.tezos.usdt]
     ] as const,
     () => [
       testTezosAccountAddress,
-      [tokens.tezos.ctez, tokens.etherlink.ctez, tokens.tezos.tez, tokens.tezos.usdt],
-      [tokens.tezos.ctez, tokens.tezos.tez, tokens.tezos.usdt]
+      [tokens.tezos.tzbtc, tokens.etherlink.tzbtc, tokens.tezos.tez, tokens.tezos.usdt],
+      [tokens.tezos.tzbtc, tokens.tezos.tez, tokens.tezos.usdt]
     ] as const,
     () => [
       testTezosAccountAddress,
-      [tokens.tezos.ctez, tokens.etherlink.ctez, tokens.tezos.tez, tokens.etherlink.tez, tokens.tezos.usdt],
-      [tokens.tezos.ctez, tokens.tezos.tez, tokens.tezos.usdt]
+      [tokens.tezos.tzbtc, tokens.etherlink.tzbtc, tokens.tezos.tez, tokens.etherlink.tez, tokens.tezos.usdt],
+      [tokens.tezos.tzbtc, tokens.tezos.tez, tokens.tezos.usdt]
     ] as const,
     () => [testEtherlinkAccountAddress, [tokens.etherlink.tez], [tokens.etherlink.tez]] as const,
-    () => [testEtherlinkAccountAddress, [tokens.etherlink.ctez], [tokens.etherlink.ctez],] as const,
-    () => [testEtherlinkAccountAddress, [tokens.etherlink.ctez, tokens.etherlink.usdt], [tokens.etherlink.ctez, tokens.etherlink.usdt]] as const,
+    () => [testEtherlinkAccountAddress, [tokens.etherlink.tzbtc], [tokens.etherlink.tzbtc]] as const,
+    () => [testEtherlinkAccountAddress, [tokens.etherlink.tzbtc, tokens.etherlink.usdt], [tokens.etherlink.tzbtc, tokens.etherlink.usdt]] as const,
     () => [
       testEtherlinkAccountAddress,
-      [tokens.etherlink.ctez, tokens.tezos.ctez, tokens.tezos.tez, tokens.etherlink.usdt],
-      [tokens.etherlink.ctez, tokens.etherlink.tez, tokens.etherlink.usdt]
+      [tokens.etherlink.tzbtc, tokens.tezos.tzbtc, tokens.tezos.tez, tokens.etherlink.usdt],
+      [tokens.etherlink.tzbtc, tokens.etherlink.tez, tokens.etherlink.usdt]
     ] as const,
   ])('Get the balance for a specific address and tokens: %#', async getTestData => {
     const [address, tokens, expectedTokens] = getTestData();
@@ -113,7 +113,7 @@ describe('Balances', () => {
           balance: expect.any(BigInt)
         },
         {
-          token: tokens.tezos.ctez,
+          token: tokens.tezos.tzbtc,
           balance: expect.any(BigInt)
         },
         {
@@ -137,7 +137,7 @@ describe('Balances', () => {
           balance: expect.any(BigInt)
         },
         {
-          token: tokens.etherlink.ctez,
+          token: tokens.etherlink.tzbtc,
           balance: expect.any(BigInt)
         },
         {
diff --git a/integration/tests/deposit.test.ts b/integration/tests/deposit.test.ts
index 4c34008..e092978 100644
--- a/integration/tests/deposit.test.ts
+++ b/integration/tests/deposit.test.ts
@@ -75,8 +75,8 @@ describe('Deposit', () => {
   });
 
   test('Deposit FA1.2 token', async () => {
-    const amount = 7n;
-    const [tezosToken, etherlinkToken] = [tokens.tezos.ctez, tokens.etherlink.ctez];
+    const amount = 7_000_000n;
+    const [tezosToken, etherlinkToken] = [tokens.tezos.tzbtc, tokens.etherlink.tzbtc];
 
     const depositResult = await tokenBridge.deposit(amount, tezosToken);
     expectPendingDeposit(depositResult.tokenTransfer, {
@@ -102,7 +102,7 @@ describe('Deposit', () => {
   });
 
   test('Deposit FA2 token', async () => {
-    const amount = 20n;
+    const amount = 20_000_000n;
     const [tezosToken, etherlinkToken] = [tokens.tezos.usdt, tokens.etherlink.usdt];
 
     const depositResult = await tokenBridge.deposit(amount, tezosToken);
@@ -129,8 +129,8 @@ describe('Deposit', () => {
   });
 
   test('Deposit FA1.2 token, check the transfer status using events (subscribeToTokenTransfer)', done => {
-    const amount = 5n;
-    const [tezosToken, etherlinkToken] = [tokens.tezos.ctez, tokens.etherlink.ctez];
+    const amount = 5_000_000n;
+    const [tezosToken, etherlinkToken] = [tokens.tezos.tzbtc, tokens.etherlink.tzbtc];
     let readyForDone = false;
 
     tokenBridge.addEventListener('tokenTransferCreated', tokenTransfer => {
@@ -174,8 +174,8 @@ describe('Deposit', () => {
   });
 
   test('Deposit FA1.2 token, check the transfer status using events (subscribeToAccountTransfers)', done => {
-    const amount = 5n;
-    const [tezosToken, etherlinkToken] = [tokens.tezos.ctez, tokens.etherlink.ctez];
+    const amount = 5_000_000n;
+    const [tezosToken, etherlinkToken] = [tokens.tezos.tzbtc, tokens.etherlink.tzbtc];
     let readyForDone = false;
     let tokenTransferOperationHash: string | undefined;
 
diff --git a/integration/tests/withdrawal.test.ts b/integration/tests/withdrawal.test.ts
index 357682a..4ca4e4d 100644
--- a/integration/tests/withdrawal.test.ts
+++ b/integration/tests/withdrawal.test.ts
@@ -46,9 +46,9 @@ describe('Withdrawal', () => {
     tokenBridge[Symbol.dispose]();
   });
 
-  test('Withdraw FA1.2 token', async () => {
-    const amount = 17n;
-    const [tezosToken, etherlinkToken] = [tokens.tezos.ctez, tokens.etherlink.ctez];
+  test.only('Withdraw FA1.2 token', async () => {
+    const amount = 1_700_000n;
+    const [tezosToken, etherlinkToken] = [tokens.tezos.tzbtc, tokens.etherlink.tzbtc];
 
     const startWithdrawResult = await tokenBridge.startWithdraw(amount, etherlinkToken);
     expectPendingWithdrawal(startWithdrawResult.tokenTransfer, {
@@ -96,7 +96,7 @@ describe('Withdrawal', () => {
   }, withdrawalTimeout);
 
   test('Withdraw FA2 token', async () => {
-    const amount = 20n;
+    const amount = 20_000_000n;
     const [tezosToken, etherlinkToken] = [tokens.tezos.usdt, tokens.etherlink.usdt];
 
     const startWithdrawResult = await tokenBridge.startWithdraw(amount, etherlinkToken);
@@ -144,9 +144,9 @@ describe('Withdrawal', () => {
     });
   }, withdrawalTimeout);
 
-  test('Withdraw FA1.2 token, check the transfer status using events (subscribeToTokenTransfer)', done => {
-    const amount = 3n;
-    const [tezosToken, etherlinkToken] = [tokens.tezos.ctez, tokens.etherlink.ctez];
+  test.skip('Withdraw FA1.2 token, check the transfer status using events (subscribeToTokenTransfer)', done => {
+    const amount = 3_000_000n;
+    const [tezosToken, etherlinkToken] = [tokens.tezos.tzbtc, tokens.etherlink.tzbtc];
     let readyForDone = false;
 
     tokenBridge.addEventListener('tokenTransferCreated', tokenTransfer => {
diff --git a/src/bridgeBlockchainService/web3EtherlinkBridgeBlockchainService/web3EtherlinkBridgeBlockchainService.ts b/src/bridgeBlockchainService/web3EtherlinkBridgeBlockchainService/web3EtherlinkBridgeBlockchainService.ts
index 6d9af93..72c92d7 100644
--- a/src/bridgeBlockchainService/web3EtherlinkBridgeBlockchainService/web3EtherlinkBridgeBlockchainService.ts
+++ b/src/bridgeBlockchainService/web3EtherlinkBridgeBlockchainService/web3EtherlinkBridgeBlockchainService.ts
@@ -28,7 +28,7 @@ export class Web3EtherlinkBridgeBlockchainService implements EtherlinkBridgeBloc
   { receipt: TransactionReceipt },
   NonPayableMethodObject,
   NonPayableMethodObject
->  {
+> {
   protected readonly web3: Web3;
   protected readonly withdrawNativeTokenPrecompiledAddress: string;
   protected readonly withdrawNonNativeTokenPrecompiledAddress: string;
@@ -67,11 +67,16 @@ export class Web3EtherlinkBridgeBlockchainService implements EtherlinkBridgeBloc
       this.getSignerAddress()
     ]);
     const data = nonNativeTokenOperation.encodeABI();
-    // TODO: need to calculate the value or hardcode it in config 
+
+    const estimatedGas = await this.web3.eth.estimateGas({
+      from: signerAddress,
+      to: this.withdrawNonNativeTokenPrecompiledAddress,
+      data,
+    });
     const receipt = await this.web3.eth.sendTransaction({
       from: signerAddress,
       to: this.withdrawNonNativeTokenPrecompiledAddress,
-      gas: 30000n,
+      gas: estimatedGas + (estimatedGas * 5n / 100n),
       gasPrice,
       data,
     });