diff --git a/remix-simulator/src/methods/accounts.js b/remix-simulator/src/methods/accounts.js
index a32ab96f53..b0563c7c57 100644
--- a/remix-simulator/src/methods/accounts.js
+++ b/remix-simulator/src/methods/accounts.js
@@ -12,19 +12,28 @@ var Accounts = function () {
   this.accountsKeys = {}
 
   executionContext.init({get: () => { return true }})
+}
 
-  for (let _account of this.accountsList) {
-    this.accountsKeys[_account.address.toLowerCase()] = _account.privateKey
-    this.accounts[_account.address.toLowerCase()] = { privateKey: Buffer.from(_account.privateKey.replace('0x', ''), 'hex'), nonce: 0 }
+Accounts.prototype.init = async function () {
+  let setBalance = (account) => {
+    return new Promise((resolve, reject) => {
+      this.accountsKeys[ethJSUtil.toChecksumAddress(account.address)] = account.privateKey
+      this.accounts[ethJSUtil.toChecksumAddress(account.address)] = { privateKey: Buffer.from(account.privateKey.replace('0x', ''), 'hex'), nonce: 0 }
 
-    executionContext.vm().stateManager.getAccount(Buffer.from(_account.address.toLowerCase().replace('0x', ''), 'hex'), (err, account) => {
-      if (err) {
-        throw new Error(err)
-      }
-      var balance = '0x56BC75E2D63100000'
-      account.balance = balance || '0xf00000000000000001'
+      executionContext.vm().stateManager.getAccount(Buffer.from(account.address.toLowerCase().replace('0x', ''), 'hex'), (err, account) => {
+        if (err) {
+          throw new Error(err)
+        }
+        var balance = '0x56BC75E2D63100000'
+        account.balance = balance || '0xf00000000000000001'
+        resolve()
+      })
     })
   }
+
+  for (let _account of this.accountsList) {
+    await setBalance(_account)
+  }
 }
 
 Accounts.prototype.methods = function () {
diff --git a/remix-simulator/src/methods/transactions.js b/remix-simulator/src/methods/transactions.js
index 754b191604..75e82a20d1 100644
--- a/remix-simulator/src/methods/transactions.js
+++ b/remix-simulator/src/methods/transactions.js
@@ -5,7 +5,9 @@ var ethJSUtil = require('ethereumjs-util')
 var processTx = require('./txProcess.js')
 var BN = ethJSUtil.BN
 
-var Transactions = function (accounts) {
+var Transactions = function () {}
+
+Transactions.prototype.init = function (accounts) {
   this.accounts = accounts
 }
 
diff --git a/remix-simulator/src/provider.js b/remix-simulator/src/provider.js
index 3778b58876..4c1f9e706a 100644
--- a/remix-simulator/src/provider.js
+++ b/remix-simulator/src/provider.js
@@ -12,18 +12,24 @@ const generateBlock = require('./genesis.js')
 
 var Provider = function (options) {
   this.Accounts = new Accounts()
+  this.Transactions = new Transactions()
 
   this.methods = {}
   this.methods = merge(this.methods, this.Accounts.methods())
   this.methods = merge(this.methods, (new Blocks(options)).methods())
   this.methods = merge(this.methods, (new Misc()).methods())
   this.methods = merge(this.methods, (new Net()).methods())
-  this.methods = merge(this.methods, (new Transactions(this.Accounts.accounts)).methods())
+  this.methods = merge(this.methods, (this.Transactions.methods()))
   this.methods = merge(this.methods, (new Whisper()).methods())
 
   generateBlock()
 }
 
+Provider.prototype.init = async function () {
+  await this.Accounts.init()
+  this.Transactions.init(this.Accounts.accounts)
+}
+
 Provider.prototype.sendAsync = function (payload, callback) {
   log.info('payload method is ', payload.method)
 
diff --git a/remix-simulator/src/server.js b/remix-simulator/src/server.js
index a8d33023c8..dcb3d4b35b 100644
--- a/remix-simulator/src/server.js
+++ b/remix-simulator/src/server.js
@@ -8,6 +8,7 @@ const log = require('./utils/logs.js')
 class Server {
   constructor (options) {
     this.provider = new Provider(options)
+    this.provider.init()
   }
 
   start (host, port) {
diff --git a/remix-tests/src/runTestSources.ts b/remix-tests/src/runTestSources.ts
index 4e765434fd..eefa1be9ba 100644
--- a/remix-tests/src/runTestSources.ts
+++ b/remix-tests/src/runTestSources.ts
@@ -10,15 +10,17 @@ import Web3 = require('web3')
 import { Provider } from 'remix-simulator'
 import { FinalResult } from './types'
 
-const createWeb3Provider = function () {
+const createWeb3Provider = async function () {
     let web3 = new Web3()
-    web3.setProvider(new Provider())
+    let provider = new Provider()
+    await provider.init()
+    web3.setProvider(provider)
     return web3
 }
 
-export function runTestSources(contractSources, testCallback, resultCallback, finalCallback, importFileCb, opts) {
+export async function runTestSources(contractSources, testCallback, resultCallback, finalCallback, importFileCb, opts) {
     opts = opts || {}
-    let web3 = opts.web3 || createWeb3Provider()
+    let web3 = opts.web3 || await createWeb3Provider()
     let accounts = opts.accounts || null
     async.waterfall([
         function getAccountList (next) {