diff --git a/js/README.md b/js/README.md
index 47f54cf..4de95e2 100644
--- a/js/README.md
+++ b/js/README.md
@@ -1,10 +1,10 @@
 # zkSync Era JavaScript Examples
 
-Examples are made to demonstrate how [zksync-ethers](https://github.com/zksync-sdk/zksync-ethers) 
+Examples are made to demonstrate how [zksync-ethers](https://github.com/zksync-sdk/zksync-ethers)
 SDK can be used for development. The examples demonstrate how to:
 
 1. Deposit ETH from Ethereum to zkSync Era.
-2. Transfer ETH on zkSync Era. 
+2. Transfer ETH on zkSync Era.
 3. Withdraw ETH from zkSync Era to Ethereum.
 4. Deploy a smart contract using create opcode.
 5. Deploy a smart contract with constructor using create opcode.
@@ -21,7 +21,7 @@ SDK can be used for development. The examples demonstrate how to:
 16. Use paymaster to pay fee with token.
 
 Smart contract deployment use already generated bytecodes and ABIs and go bindings.
-There is a [user guide](../solidity/README.md) on how those artifacts 
+There is a [user guide](../solidity/README.md) on how those artifacts
 are generated. Same approach can be used to generate required artifact
 for other smart contracts.
 
@@ -29,4 +29,4 @@ for other smart contracts.
 
 ```shell
 yarn install
-```
\ No newline at end of file
+```
diff --git a/js/tests/contract_factory.test.ts b/js/tests/contract_factory.test.ts
index dc3902a..ea80fe7 100644
--- a/js/tests/contract_factory.test.ts
+++ b/js/tests/contract_factory.test.ts
@@ -1,11 +1,10 @@
 import * as chai from "chai";
 import "./custom-matchers";
 import { Provider, types, ContractFactory, Wallet, Contract } from "zksync-ethers";
-import {ethers, Typed} from "ethers";
+import { ethers, Typed } from "ethers";
 
 const { expect } = chai;
 
-
 describe("ContractFactory", () => {
     const PRIVATE_KEY = "0x7726827caac94a7f9e1b160f7ea819f172f7b6f9d2a97f992c38edeab82d4110";
 
@@ -21,7 +20,7 @@ describe("ContractFactory", () => {
         const bytecode: string = conf.contracts["Storage.sol:Storage"].bin;
 
         const factory = new ContractFactory(abi, bytecode, wallet);
-        const storage = await factory.deploy() as Contract;
+        const storage = (await factory.deploy()) as Contract;
 
         const code = await provider.getCode(await storage.getAddress());
         expect(code).not.to.be.null;
@@ -42,7 +41,7 @@ describe("ContractFactory", () => {
         const bytecode: string = conf.contracts["Incrementer.sol:Incrementer"].bin;
 
         const factory = new ContractFactory(abi, bytecode, wallet);
-        const incrementer = await factory.deploy(2) as Contract;
+        const incrementer = (await factory.deploy(2)) as Contract;
 
         const code = await provider.getCode(await incrementer.getAddress());
         expect(code).not.to.be.null;
@@ -92,12 +91,7 @@ describe("ContractFactory", () => {
         const abi = conf.abi;
         const bytecode: string = conf.bytecode;
 
-        const accountFactory = new ContractFactory(
-            abi,
-            bytecode,
-            wallet,
-            "createAccount",
-        );
+        const accountFactory = new ContractFactory(abi, bytecode, wallet, "createAccount");
         const paymasterContract = await accountFactory.deploy(await provider.l2TokenAddress(l1DAI));
 
         const code = await provider.getCode(await paymasterContract.getAddress());
@@ -190,16 +184,10 @@ describe("ContractFactory", () => {
         const abi = conf.abi;
         const bytecode: string = conf.bytecode;
 
-        const factory = new ContractFactory(
-            abi,
-            bytecode,
-            wallet,
-            "create2Account",
-        );
-        const account = await factory.deploy(
-            await provider.l2TokenAddress(l1DAI),
-            { customData: { salt: ethers.hexlify(ethers.randomBytes(32)) } },
-        );
+        const factory = new ContractFactory(abi, bytecode, wallet, "create2Account");
+        const account = await factory.deploy(await provider.l2TokenAddress(l1DAI), {
+            customData: { salt: ethers.hexlify(ethers.randomBytes(32)) },
+        });
 
         const code = await provider.getCode(await account.getAddress());
         expect(code).not.to.be.null;
diff --git a/js/tests/paymaster.test.ts b/js/tests/paymaster.test.ts
index 283c2a9..849c9aa 100644
--- a/js/tests/paymaster.test.ts
+++ b/js/tests/paymaster.test.ts
@@ -1,9 +1,9 @@
 import * as chai from "chai";
 import "./custom-matchers";
-import {ContractFactory, Provider, types, utils, Wallet} from "zksync-ethers";
-import {Contract, ethers, Typed} from "ethers";
+import { ContractFactory, Provider, types, utils, Wallet } from "zksync-ethers";
+import { Contract, ethers, Typed } from "ethers";
 
-const {expect} = chai;
+const { expect } = chai;
 
 describe("Paymaster", () => {
     const PRIVATE_KEY = "0x7726827caac94a7f9e1b160f7ea819f172f7b6f9d2a97f992c38edeab82d4110";
@@ -95,7 +95,7 @@ describe("Paymaster", () => {
         expect(walletBalanceBeforeTx - walletBalanceAfterTx >= BigInt(0)).to.be.true;
         expect(
             walletTokenBalanceAfterTx ==
-            walletTokenBalanceBeforeTx - BigInt(MINIMAL_ALLOWANCE) + BigInt(MINT_AMOUNT),
+                walletTokenBalanceBeforeTx - BigInt(MINIMAL_ALLOWANCE) + BigInt(MINT_AMOUNT),
         ).to.be.true;
     }).timeout(30_000);
 });