diff --git a/client/rpc/src/eth/block.rs b/client/rpc/src/eth/block.rs
index d10f0d3621..9b578d614c 100644
--- a/client/rpc/src/eth/block.rs
+++ b/client/rpc/src/eth/block.rs
@@ -167,6 +167,13 @@ where
 	}
 
 	pub fn block_transaction_count_by_number(&self, number: BlockNumber) -> Result<Option<U256>> {
+		if let BlockNumber::Pending = number {
+			// get the pending transactions count
+			return Ok(Some(U256::from(
+				self.graph.validated_pool().ready().count(),
+			)));
+		}
+
 		let id = match frontier_backend_client::native_block_id::<B, C>(
 			self.client.as_ref(),
 			self.backend.as_ref(),
diff --git a/ts-tests/README.md b/ts-tests/README.md
index e0a0100d50..ce3794bcb9 100644
--- a/ts-tests/README.md
+++ b/ts-tests/README.md
@@ -1,29 +1,35 @@
 # Functional testing for Substrate Frontier Node RPC
 
-This folder contains a set of functional tests desgined to perform functional testing on the Frontier Eth RPC.
+This folder contains a set of functional tests designed to perform functional testing on the Frontier Eth RPC.
 
 It is written in typescript, using Mocha/Chai as Test framework.
 
 ## Test flow
 
-Tests are separated depending of their genesis requirements.
-Each group will start a [frontier test node](frontier-test-node) with a given [spec](substrate-specs) before executing the tests.
+Tests are separated depending on their genesis requirements.
+Each group will start a `frontier test node` with a given `spec` before executing the tests.
 
-## Installation
+## Build the manual seal node for tests
 
+```bash
+cargo build --release --no-default-features --features manual-seal,rpc_binary_search_estimate
 ```
+
+## Installation
+
+```bash
 npm install
 ```
 
 ## Run the tests
 
-```
-npm run test
+```bash
+npm run build && npm run test
 ```
 
 You can also add the Frontier Node logs to the output using the `FRONTIER_LOG` env variable. Ex:
 
-```
+```bash
 FRONTIER_LOG="warn,rpc=trace" npm run test
 ```
 
diff --git a/ts-tests/tests/test-balance.ts b/ts-tests/tests/test-balance.ts
index 78d0938841..2244ad6a6c 100644
--- a/ts-tests/tests/test-balance.ts
+++ b/ts-tests/tests/test-balance.ts
@@ -19,7 +19,7 @@ describeWithFrontier("Frontier RPC (Balance)", (context) => {
 		const tx = await context.web3.eth.accounts.signTransaction({
 			from: GENESIS_ACCOUNT,
 			to: TEST_ACCOUNT,
-			value: "0x200", // Must me higher than ExistentialDeposit (500)
+			value: "0x200", // Must be higher than ExistentialDeposit (500)
 			gasPrice: "0x3B9ACA00",
 			gas: "0x100000",
 		}, GENESIS_ACCOUNT_PRIVATE_KEY);
diff --git a/ts-tests/tests/test-nonce.ts b/ts-tests/tests/test-nonce.ts
index 439cfc9174..187b8b75ea 100644
--- a/ts-tests/tests/test-nonce.ts
+++ b/ts-tests/tests/test-nonce.ts
@@ -13,7 +13,7 @@ describeWithFrontier("Frontier RPC (Nonce)", (context) => {
 		const tx = await context.web3.eth.accounts.signTransaction({
 			from: GENESIS_ACCOUNT,
 			to: TEST_ACCOUNT,
-			value: "0x200", // Must me higher than ExistentialDeposit (500)
+			value: "0x200", // Must be higher than ExistentialDeposit (500)
 			gasPrice: "0x3B9ACA00",
 			gas: "0x100000",
 		}, GENESIS_ACCOUNT_PRIVATE_KEY);
diff --git a/ts-tests/tests/test-pending-pool.ts b/ts-tests/tests/test-pending-pool.ts
index bdeecf1d11..333ccc8bb2 100644
--- a/ts-tests/tests/test-pending-pool.ts
+++ b/ts-tests/tests/test-pending-pool.ts
@@ -49,3 +49,73 @@ describeWithFrontier("Frontier RPC (Pending Pool)", (context) => {
 		});
 	});
 });
+
+describeWithFrontier("Frontier RPC (Pending Transaction Count)", (context) => {
+	const GENESIS_ACCOUNT = "0x6be02d1d3665660d22ff9624b7be0551ee1ac91b";
+	const GENESIS_ACCOUNT_PRIVATE_KEY = "0x99B3C12287537E38C90A9219D4CB074A89A16E9CDB20BF85728EBD97C343E342";
+	const TEST_ACCOUNT = "0x1111111111111111111111111111111111111111";
+
+	it("should return pending transaction count", async function () {
+		this.timeout(15000);
+
+		// nonce should be 0
+		expect(await context.web3.eth.getTransactionCount(GENESIS_ACCOUNT, 'latest')).to.eq(0);
+
+		var nonce = 0;
+		let sendTransaction = async () => {
+			const tx = await context.web3.eth.accounts.signTransaction(
+				{
+					from: GENESIS_ACCOUNT,
+					to: TEST_ACCOUNT,
+					value: "0x200", // Must be higher than ExistentialDeposit (500)
+					gasPrice: "0x3B9ACA00",
+					gas: "0x100000",
+					nonce: nonce,
+				},
+				GENESIS_ACCOUNT_PRIVATE_KEY
+			);
+			nonce = nonce + 1;
+			return (await customRequest(context.web3, "eth_sendRawTransaction", [tx.rawTransaction])).result
+		};
+
+		{
+			const pending_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", ['pending'])).result;
+			expect(pending_transaction_count).to.eq('0x0');
+		}
+
+		// block 1 should have 1 transaction
+		await sendTransaction();
+		{
+			const pending_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", ['pending'])).result;
+			expect(pending_transaction_count).to.eq('0x1');
+		}
+
+		await createAndFinalizeBlock(context.web3);
+
+		{
+			const pending_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", ['pending'])).result;
+			expect(pending_transaction_count).to.eq('0x0');
+			const processed_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", [1])).result;
+			expect(processed_transaction_count).to.eq('0x1');
+		}
+
+		// block 2 should have 5 transactions
+		for (var _ of Array(5)) {
+			await sendTransaction();
+		}
+
+		{
+			const pending_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", ['pending'])).result;
+			expect(pending_transaction_count).to.eq('0x5');
+		}
+
+		await createAndFinalizeBlock(context.web3);
+
+		{
+			const pending_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", ['pending'])).result;
+			expect(pending_transaction_count).to.eq('0x0');
+			const processed_transaction_count = (await customRequest(context.web3, "eth_getBlockTransactionCountByNumber", [2])).result;
+			expect(processed_transaction_count).to.eq('0x5');
+		}
+	});
+});