diff --git a/packages/web3-eth/test/integration/block/rpc.getTransactionCount.test.ts b/packages/web3-eth/test/integration/block/rpc.getTransactionCount.test.ts
index f0bc4d5c2ca..e51b4b5d5f3 100644
--- a/packages/web3-eth/test/integration/block/rpc.getTransactionCount.test.ts
+++ b/packages/web3-eth/test/integration/block/rpc.getTransactionCount.test.ts
@@ -105,6 +105,7 @@ describe('rpc with block', () => {
 				from: acc.address,
 				value: '0x1',
 				times: 1,
+				waitAfterEachSend: 500,
 			});
 			const data = {
 				pending: 'pending',
@@ -124,7 +125,7 @@ describe('rpc with block', () => {
 				from: acc.address,
 				value: '0x1',
 				times: count,
-				waitAfterEachSend: 200,
+				waitAfterEachSend: 500,
 			});
 			const receiptAfter = res[res.length - 1];
 			const dataAfter = {
diff --git a/packages/web3-eth/test/integration/helper.ts b/packages/web3-eth/test/integration/helper.ts
index aa388d5504d..0504b95b5fb 100644
--- a/packages/web3-eth/test/integration/helper.ts
+++ b/packages/web3-eth/test/integration/helper.ts
@@ -62,6 +62,7 @@ export const sendFewTxes = async ({
 			}),
 		);
 		if (waitAfterEachSend) {
+			// to ensure the block got mined on dev environment
 			// eslint-disable-next-line no-await-in-loop
 			await new Promise<void>(resolve => {
 				setTimeout(resolve, waitAfterEachSend);