diff --git a/web3.js/test/account.test.ts b/web3.js/test/account.test.ts
index 991c1ae9e72abc..8d9eb1ee4dd122 100644
--- a/web3.js/test/account.test.ts
+++ b/web3.js/test/account.test.ts
@@ -1,5 +1,6 @@
 import {expect} from 'chai';
 import {Buffer} from 'buffer';
+import { describe } from 'mocha';
 
 import {Account} from '../src/account';
 
diff --git a/web3.js/test/bpf-loader.test.ts b/web3.js/test/bpf-loader.test.ts
index ee40d17e177327..c777d9cb5c83df 100644
--- a/web3.js/test/bpf-loader.test.ts
+++ b/web3.js/test/bpf-loader.test.ts
@@ -1,5 +1,6 @@
 import fs from 'mz/fs';
 import {expect, use} from 'chai';
+import { describe } from 'mocha';
 import chaiAsPromised from 'chai-as-promised';
 
 import {
@@ -12,6 +13,7 @@ import {
 import {url} from './url';
 import {BPF_LOADER_PROGRAM_ID} from '../src/bpf-loader';
 import {helpers} from './mocks/rpc-http';
+import { fail } from 'assert';
 
 use(chaiAsPromised);
 
@@ -160,10 +162,15 @@ if (process.env.TEST_LIVE) {
           ])
         ).value;
         const expectedReturnData = new Uint8Array([1, 2, 3]);
-        var decodedData = Buffer.from(returnData.data[0], returnData.data[1]);
-        expect(err).to.be.null;
-        expect(returnData.programId).to.eql(program.publicKey.toString());
-        expect(decodedData).to.eql(expectedReturnData);
+
+        if (returnData) {
+          var decodedData = Buffer.from(returnData.data[0], returnData.data[1]);
+          expect(err).to.be.null;
+          expect(returnData.programId).to.eql(program.publicKey.toString());
+          expect(decodedData).to.eql(expectedReturnData);
+        } else {
+          fail("return data must be defined!");
+        }
       });
 
       it('deprecated - simulate transaction without signature verification', async () => {
diff --git a/web3.js/test/cluster.test.ts b/web3.js/test/cluster.test.ts
index 8acf6c370706a0..39966c27ec5157 100644
--- a/web3.js/test/cluster.test.ts
+++ b/web3.js/test/cluster.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {clusterApiUrl} from '../src/utils/cluster';
 
diff --git a/web3.js/test/connection-subscriptions.test.ts b/web3.js/test/connection-subscriptions.test.ts
index f55b6a8d673420..db5bba8a94fce4 100644
--- a/web3.js/test/connection-subscriptions.test.ts
+++ b/web3.js/test/connection-subscriptions.test.ts
@@ -1,4 +1,5 @@
 import chai from 'chai';
+import { describe } from 'mocha';
 import {Client} from 'rpc-websockets';
 import {stub, SinonStubbedInstance, SinonSpy, spy} from 'sinon';
 import sinonChai from 'sinon-chai';
diff --git a/web3.js/test/connection.test.ts b/web3.js/test/connection.test.ts
index 08e0383114f7c9..a549358c49ad0a 100644
--- a/web3.js/test/connection.test.ts
+++ b/web3.js/test/connection.test.ts
@@ -2,10 +2,10 @@ import bs58 from 'bs58';
 import {Buffer} from 'buffer';
 import * as splToken from '@solana/spl-token';
 import {expect, use} from 'chai';
+import { describe } from 'mocha';
 import chaiAsPromised from 'chai-as-promised';
 import {Agent as HttpAgent} from 'http';
 import {Agent as HttpsAgent} from 'https';
-import {AbortController} from 'node-abort-controller';
 import {match, mock, spy, useFakeTimers, SinonFakeTimers} from 'sinon';
 import sinonChai from 'sinon-chai';
 
@@ -75,6 +75,7 @@ import type {
 import {VersionedTransaction} from '../src/transaction/versioned';
 import {MessageV0} from '../src/message/v0';
 import {encodeData} from '../src/instruction';
+import { fail } from 'assert';
 
 use(chaiAsPromised);
 use(sinonChai);
@@ -171,10 +172,16 @@ describe('Connection', function () {
     it('should allow middleware to augment request', async () => {
       let connection = new Connection(url, {
         fetchMiddleware: (url, options, fetch) => {
-          options.headers = Object.assign(options.headers, {
-            Authorization: 'Bearer 123',
-          });
-          fetch(url, options);
+          if (options) {
+            options.headers = Object.assign(options.headers!, {
+              Authorization: 'Bearer 123',
+            });
+
+            fetch(url, options);
+
+          } else {
+            fail("options must be defined!");
+          }
         },
       });
 
@@ -254,7 +261,7 @@ describe('Connection', function () {
   it('should not attribute fetch errors to the middleware', async () => {
     let connection = new Connection(url, {
       fetchMiddleware: (url, _options, fetch) => {
-        fetch(url, 'An `Object` was expected here; this is a `TypeError`.');
+        fetch(url, {'body': 'An `Object` was expected here; this is a `TypeError`.'});
       },
     });
     const error = await expect(connection.getVersion()).to.be.rejected;
@@ -1334,7 +1341,8 @@ describe('Connection', function () {
           const mockSignature =
             'LPJ18iiyfz3G1LpNNbcBnBtaS4dVBdPHKrnELqikjER2DcvB4iyTgz43nKQJH3JQAJHuZdM1xVh5Cnc5Hc7LrqC';
 
-          let resolveResultPromise: (result: SignatureResult) => void;
+          let resolveResultPromise = function(result: SignatureResult): void {};
+
           await mockRpcMessage({
             method: 'signatureSubscribe',
             params: [mockSignature, {commitment: 'finalized'}],
@@ -1344,7 +1352,7 @@ describe('Connection', function () {
           });
 
           // Simulate a failure to fetch the block height.
-          let rejectBlockheightPromise: () => void;
+          let rejectBlockheightPromise = function(): void {};
           await mockRpcResponse({
             method: 'getBlockHeight',
             params: [],
@@ -1375,7 +1383,7 @@ describe('Connection', function () {
           const mockSignature =
             'LPJ18iiyfz3G1LpNNbcBnBtaS4dVBdPHKrnELqikjER2DcvB4iyTgz43nKQJH3JQAJHuZdM1xVh5Cnc5Hc7LrqC';
 
-          let resolveResultPromise: (result: SignatureResult) => void;
+          let resolveResultPromise = function(result: SignatureResult): void {};
           await mockRpcMessage({
             method: 'signatureSubscribe',
             params: [mockSignature, {commitment: 'finalized'}],
@@ -1455,7 +1463,7 @@ describe('Connection', function () {
           const mockSignature =
             '4oCEqwGrMdBeMxpzuWiukCYqSfV4DsSKXSiVVCh1iJ6pS772X7y219JZP3mgqBz5PhsvprpKyhzChjYc3VSBQXzG';
 
-          let resolveResultPromise: (result: SignatureResult) => void;
+          let resolveResultPromise= function(result: SignatureResult): void {};
           await mockRpcMessage({
             method: 'signatureSubscribe',
             params: [mockSignature, {commitment: 'finalized'}],
@@ -1666,7 +1674,7 @@ describe('Connection', function () {
           const mockSignature =
             'LPJ18iiyfz3G1LpNNbcBnBtaS4dVBdPHKrnELqikjER2DcvB4iyTgz43nKQJH3JQAJHuZdM1xVh5Cnc5Hc7LrqC';
 
-          let resolveResultPromise: (result: SignatureResult) => void;
+          let resolveResultPromise = function(result: SignatureResult): void {};
           await mockRpcMessage({
             method: 'signatureSubscribe',
             params: [mockSignature, {commitment: 'finalized'}],
@@ -1676,7 +1684,7 @@ describe('Connection', function () {
           });
 
           // Simulate a failure to fetch the nonce account.
-          let rejectNonceAccountFetchPromise: () => void;
+          let rejectNonceAccountFetchPromise = function(): void {};
           await mockRpcResponse({
             method: 'getAccountInfo',
             params: [],
@@ -1762,7 +1770,7 @@ describe('Connection', function () {
           const mockSignature =
             'LPJ18iiyfz3G1LpNNbcBnBtaS4dVBdPHKrnELqikjER2DcvB4iyTgz43nKQJH3JQAJHuZdM1xVh5Cnc5Hc7LrqC';
 
-          let resolveResultPromise: (result: SignatureResult) => void;
+          let resolveResultPromise = function(result: SignatureResult): void {};
           await mockRpcMessage({
             method: 'signatureSubscribe',
             params: [mockSignature, {commitment: 'finalized'}],
@@ -5391,9 +5399,9 @@ describe('Connection', function () {
       );
 
       await connection.confirmTransaction({
-        blockhash: transaction.recentBlockhash,
-        lastValidBlockHeight: transaction.lastValidBlockHeight,
-        signature,
+        blockhash: transaction.recentBlockhash!,
+        lastValidBlockHeight: transaction.lastValidBlockHeight!,
+        signature: signature,
       });
 
       const response = (await connection.getSignatureStatus(signature)).value;
diff --git a/web3.js/test/epoch-schedule.test.ts b/web3.js/test/epoch-schedule.test.ts
index 7ab0d02e9ebca7..bba65b7d101a20 100644
--- a/web3.js/test/epoch-schedule.test.ts
+++ b/web3.js/test/epoch-schedule.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {EpochSchedule} from '../src';
 
diff --git a/web3.js/test/keypair.test.ts b/web3.js/test/keypair.test.ts
index 60185d5b845c38..642739ede63948 100644
--- a/web3.js/test/keypair.test.ts
+++ b/web3.js/test/keypair.test.ts
@@ -1,5 +1,6 @@
 import {expect} from 'chai';
 import {Buffer} from 'buffer';
+import { describe } from 'mocha';
 
 import {Keypair} from '../src';
 
diff --git a/web3.js/test/makeWebsocketUrl.test.ts b/web3.js/test/makeWebsocketUrl.test.ts
index 4f0c196d52e287..fd4bda2e31b224 100644
--- a/web3.js/test/makeWebsocketUrl.test.ts
+++ b/web3.js/test/makeWebsocketUrl.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {makeWebsocketUrl} from '../src/utils/makeWebsocketUrl';
 
diff --git a/web3.js/test/message-tests/account-keys.test.ts b/web3.js/test/message-tests/account-keys.test.ts
index ec132e4d96573a..4603cf4aa74b39 100644
--- a/web3.js/test/message-tests/account-keys.test.ts
+++ b/web3.js/test/message-tests/account-keys.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {
   MessageAccountKeys,
diff --git a/web3.js/test/message-tests/compiled-keys.test.ts b/web3.js/test/message-tests/compiled-keys.test.ts
index adca1cefe2407a..8c262f40e3d478 100644
--- a/web3.js/test/message-tests/compiled-keys.test.ts
+++ b/web3.js/test/message-tests/compiled-keys.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {CompiledKeyMeta, CompiledKeys} from '../../src/message/compiled-keys';
 import {AddressLookupTableAccount} from '../../src/programs';
diff --git a/web3.js/test/message-tests/legacy.test.ts b/web3.js/test/message-tests/legacy.test.ts
index 5af60c8cff3131..0d7874502c04bb 100644
--- a/web3.js/test/message-tests/legacy.test.ts
+++ b/web3.js/test/message-tests/legacy.test.ts
@@ -1,5 +1,6 @@
 import bs58 from 'bs58';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 import {sha256} from '@noble/hashes/sha256';
 
 import {Message} from '../../src/message';
diff --git a/web3.js/test/message-tests/v0.test.ts b/web3.js/test/message-tests/v0.test.ts
index 8705f7b0fd098b..b467591f61d383 100644
--- a/web3.js/test/message-tests/v0.test.ts
+++ b/web3.js/test/message-tests/v0.test.ts
@@ -1,5 +1,6 @@
 import bs58 from 'bs58';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 import {sha256} from '@noble/hashes/sha256';
 
 import {
diff --git a/web3.js/test/message-tests/versioned.test.ts b/web3.js/test/message-tests/versioned.test.ts
index 1acaf7823b1443..bfd2b2e41386b5 100644
--- a/web3.js/test/message-tests/versioned.test.ts
+++ b/web3.js/test/message-tests/versioned.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {VersionedMessage} from '../../src/message';
 
diff --git a/web3.js/test/mocks/rpc-http.ts b/web3.js/test/mocks/rpc-http.ts
index 5156201efbaa7f..ff70135145e6fa 100644
--- a/web3.js/test/mocks/rpc-http.ts
+++ b/web3.js/test/mocks/rpc-http.ts
@@ -128,7 +128,7 @@ const latestBlockhash = async ({
   commitment?: Commitment;
 }) => {
   const blockhash = uniqueBlockhash();
-  const params = [];
+  const params: Array<Object> = [];
   if (commitment) {
     params.push({commitment});
   }
@@ -154,7 +154,7 @@ const recentBlockhash = async ({
   commitment?: Commitment;
 }) => {
   const blockhash = uniqueBlockhash();
-  const params = [];
+  const params: Array<Object> = [];
   if (commitment) {
     params.push({commitment});
   }
diff --git a/web3.js/test/nonce.test.ts b/web3.js/test/nonce.test.ts
index 81d871d0d494c9..cc946ab91700d6 100644
--- a/web3.js/test/nonce.test.ts
+++ b/web3.js/test/nonce.test.ts
@@ -1,6 +1,7 @@
 import bs58 from 'bs58';
 import {Buffer} from 'buffer';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {
   Connection,
diff --git a/web3.js/test/program-tests/address-lookup-table.test.ts b/web3.js/test/program-tests/address-lookup-table.test.ts
index 5b5d4860529498..b6b29d47b5f9a6 100644
--- a/web3.js/test/program-tests/address-lookup-table.test.ts
+++ b/web3.js/test/program-tests/address-lookup-table.test.ts
@@ -1,4 +1,5 @@
 import {expect, use} from 'chai';
+import { describe } from 'mocha';
 import chaiAsPromised from 'chai-as-promised';
 
 import {
diff --git a/web3.js/test/program-tests/compute-budget.test.ts b/web3.js/test/program-tests/compute-budget.test.ts
index 1269b96812c5f5..177739374f7371 100644
--- a/web3.js/test/program-tests/compute-budget.test.ts
+++ b/web3.js/test/program-tests/compute-budget.test.ts
@@ -1,4 +1,5 @@
 import {expect, use} from 'chai';
+import { describe } from 'mocha';
 import chaiAsPromised from 'chai-as-promised';
 
 import {
diff --git a/web3.js/test/program-tests/ed25519.test.ts b/web3.js/test/program-tests/ed25519.test.ts
index 853dae6cf39abc..58e15fb75229f9 100644
--- a/web3.js/test/program-tests/ed25519.test.ts
+++ b/web3.js/test/program-tests/ed25519.test.ts
@@ -1,4 +1,5 @@
 import {Buffer} from 'buffer';
+import { describe } from 'mocha';
 
 import {
   Connection,
diff --git a/web3.js/test/program-tests/secp256k1.test.ts b/web3.js/test/program-tests/secp256k1.test.ts
index 50f26c94637e26..9d794bcd06c698 100644
--- a/web3.js/test/program-tests/secp256k1.test.ts
+++ b/web3.js/test/program-tests/secp256k1.test.ts
@@ -1,5 +1,6 @@
 import {Buffer} from 'buffer';
 import {keccak_256} from '@noble/hashes/sha3';
+import { describe } from 'mocha';
 
 import {
   ecdsaSign,
diff --git a/web3.js/test/program-tests/stake.test.ts b/web3.js/test/program-tests/stake.test.ts
index 15c7625a2b7596..638e4f8886d49a 100644
--- a/web3.js/test/program-tests/stake.test.ts
+++ b/web3.js/test/program-tests/stake.test.ts
@@ -1,5 +1,6 @@
 import {expect, use} from 'chai';
 import chaiAsPromised from 'chai-as-promised';
+import { describe } from 'mocha';
 
 import {
   Keypair,
diff --git a/web3.js/test/program-tests/system.test.ts b/web3.js/test/program-tests/system.test.ts
index cfdca891b398f5..a1f2c50ab197c9 100644
--- a/web3.js/test/program-tests/system.test.ts
+++ b/web3.js/test/program-tests/system.test.ts
@@ -1,5 +1,6 @@
 import {Buffer} from 'buffer';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {
   Keypair,
diff --git a/web3.js/test/program-tests/vote.test.ts b/web3.js/test/program-tests/vote.test.ts
index bb8cc57ed6284c..ca9336253fc70d 100644
--- a/web3.js/test/program-tests/vote.test.ts
+++ b/web3.js/test/program-tests/vote.test.ts
@@ -1,4 +1,5 @@
 import {expect, use} from 'chai';
+import { describe } from 'mocha';
 import chaiAsPromised from 'chai-as-promised';
 
 import {
diff --git a/web3.js/test/publickey.test.ts b/web3.js/test/publickey.test.ts
index bc4b9cb4c3fa38..de9c382b62fdc1 100644
--- a/web3.js/test/publickey.test.ts
+++ b/web3.js/test/publickey.test.ts
@@ -1,6 +1,7 @@
 import BN from 'bn.js';
 import {Buffer} from 'buffer';
 import {expect, use} from 'chai';
+import { describe } from 'mocha';
 import chaiAsPromised from 'chai-as-promised';
 
 import {Keypair} from '../src/keypair';
diff --git a/web3.js/test/shortvec-encoding.test.ts b/web3.js/test/shortvec-encoding.test.ts
index 68f8415862cdaa..3ec4a945664b84 100644
--- a/web3.js/test/shortvec-encoding.test.ts
+++ b/web3.js/test/shortvec-encoding.test.ts
@@ -1,4 +1,5 @@
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {decodeLength, encodeLength} from '../src/utils/shortvec-encoding';
 
diff --git a/web3.js/test/transaction-payer.test.ts b/web3.js/test/transaction-payer.test.ts
index f4127327ce366a..b921a19d24cdb8 100644
--- a/web3.js/test/transaction-payer.test.ts
+++ b/web3.js/test/transaction-payer.test.ts
@@ -1,5 +1,6 @@
 import base58 from 'bs58';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {
   Keypair,
diff --git a/web3.js/test/transaction-tests/message.test.ts b/web3.js/test/transaction-tests/message.test.ts
index ce4937c04374ae..5228214588b7ae 100644
--- a/web3.js/test/transaction-tests/message.test.ts
+++ b/web3.js/test/transaction-tests/message.test.ts
@@ -1,6 +1,7 @@
 import bs58 from 'bs58';
 import {expect} from 'chai';
 import {sha256} from '@noble/hashes/sha256';
+import { describe } from 'mocha';
 
 import {
   Transaction,
diff --git a/web3.js/test/transaction.test.ts b/web3.js/test/transaction.test.ts
index cd9574bb2d8f83..56d32010bdf2cc 100644
--- a/web3.js/test/transaction.test.ts
+++ b/web3.js/test/transaction.test.ts
@@ -1,6 +1,7 @@
 import bs58 from 'bs58';
 import {Buffer} from 'buffer';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {Connection} from '../src/connection';
 import {Keypair} from '../src/keypair';
diff --git a/web3.js/test/url.ts b/web3.js/test/url.ts
index 040b53a7016258..091d20069a075a 100644
--- a/web3.js/test/url.ts
+++ b/web3.js/test/url.ts
@@ -1,8 +1,14 @@
 /**
  * The connection url to use when running unit tests against a live cluster
  */
-
 export const MOCK_PORT = 9999;
+
+declare var process: {
+  env: {
+    TEST_LIVE: string
+  }
+}
+
 export const url = process.env.TEST_LIVE
   ? 'http://localhost:8899/'
   : 'http://localhost:9999/';
diff --git a/web3.js/test/validator-info.test.ts b/web3.js/test/validator-info.test.ts
index 5bed6c9222c347..03eff5c997cc05 100644
--- a/web3.js/test/validator-info.test.ts
+++ b/web3.js/test/validator-info.test.ts
@@ -1,5 +1,6 @@
 import {Buffer} from 'buffer';
 import {expect} from 'chai';
+import { describe } from 'mocha';
 
 import {Keypair} from '../src/keypair';
 import {PublicKey} from '../src/publickey';
diff --git a/web3.js/test/websocket.test.ts b/web3.js/test/websocket.test.ts
index b1d9a1932fb30b..3c2649ba1b5b2e 100644
--- a/web3.js/test/websocket.test.ts
+++ b/web3.js/test/websocket.test.ts
@@ -2,6 +2,7 @@ import bs58 from 'bs58';
 import {Buffer} from 'buffer';
 import {expect, use} from 'chai';
 import chaiAsPromised from 'chai-as-promised';
+import { describe } from 'mocha';
 
 import {Connection} from '../src';
 import {url, wsUrl} from './url';