diff --git a/crates/starknet_mempool_p2p/src/runner/test.rs b/crates/starknet_mempool_p2p/src/runner/test.rs
index e45724f7c2..175adb7499 100644
--- a/crates/starknet_mempool_p2p/src/runner/test.rs
+++ b/crates/starknet_mempool_p2p/src/runner/test.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;
 use std::time::Duration;
 
-use futures::SinkExt;
+use futures::{SinkExt, StreamExt};
 use papyrus_network::network_manager::test_utils::{
     mock_register_broadcast_topic,
     BroadcastNetworkMock,
@@ -14,7 +14,8 @@ use papyrus_protobuf::mempool::RpcTransactionWrapper;
 use papyrus_test_utils::{get_rng, GetTestInstance};
 use starknet_api::rpc_transaction::RpcTransaction;
 use starknet_api::transaction::TransactionHash;
-use starknet_gateway_types::communication::MockGatewayClient;
+use starknet_gateway_types::communication::{GatewayClientError, MockGatewayClient};
+use starknet_gateway_types::errors::{GatewayError, GatewaySpecError};
 use starknet_sequencer_infra::component_definitions::ComponentStarter;
 
 use super::MempoolP2pRunner;
@@ -69,3 +70,65 @@ async fn incoming_p2p_tx_reaches_gateway_client() {
         res = add_tx_indicator_receiver => {res.unwrap()}
     }
 }
+
+// The p2p runner receives a tx from network, and fails to forwards it to the gateway.
+#[tokio::test]
+async fn incoming_p2p_tx_fails_on_gateway_client() {
+    // Mock a network for the other node to send tx to our p2p runner using the subscriber channels.
+    let TestSubscriberChannels { mock_network, subscriber_channels } =
+        mock_register_broadcast_topic().expect("Failed to create mock network");
+    let BroadcastTopicChannels { broadcasted_messages_receiver, broadcast_topic_client } =
+        subscriber_channels; // used to created our node's p2p runner below, which will listen for incoming txs over broadcasted_messages_receiver.
+    let BroadcastNetworkMock {
+        broadcasted_messages_sender: mut mock_broadcasted_messages_sender,
+        reported_messages_receiver: mut mock_reported_messages_receiver,
+        ..
+    } = mock_network; // other node sending tx to our p2p runner
+
+    // Creating a placeholder network manager with default config for init of a mempool receiver
+    let placeholder_network_manager = NetworkManager::new(NetworkConfig::default(), None);
+
+    // send an empty message on this channel to indicate that the tx reached the gateway client.
+    let (add_tx_indicator_sender, add_tx_indicator_receiver) = futures::channel::oneshot::channel();
+
+    let message_metadata = BroadcastedMessageMetadata::get_test_instance(&mut get_rng());
+    let message_metadata_clone = message_metadata.clone();
+    let expected_rpc_transaction =
+        RpcTransactionWrapper(RpcTransaction::get_test_instance(&mut get_rng()));
+
+    let mut mock_gateway_client = MockGatewayClient::new();
+    mock_gateway_client.expect_add_tx().return_once(move |_| {
+        add_tx_indicator_sender.send(()).unwrap();
+        Err(GatewayClientError::GatewayError(GatewayError::GatewaySpecError {
+            source: GatewaySpecError::DuplicateTx,
+            p2p_message_metadata: Some(message_metadata_clone),
+        }))
+    });
+    let mut mempool_p2p_runner = MempoolP2pRunner::new(
+        Some(placeholder_network_manager),
+        broadcasted_messages_receiver,
+        broadcast_topic_client,
+        Arc::new(mock_gateway_client),
+    );
+
+    // Sending the expected transaction to the mempool runner
+    let res = mock_broadcasted_messages_sender
+        .send((expected_rpc_transaction.clone(), message_metadata.clone()));
+
+    res.await.expect("Failed to send message");
+
+    tokio::select! {
+    // if the runner takes longer than 5 seconds to start, we panic.
+    // if the runner fails, there was a network issue => panic.
+    // if the runner returns successfully, we panic because the runner should never terminate.
+    res = tokio::time::timeout(Duration::from_secs(5), mempool_p2p_runner.start()) => {res.expect("Test timed out").expect("Runner failed - network stopped unexpectedly"); panic!("Runner terminated")},
+    // if a message was received on this oneshot channel, the gateway client received the tx.
+    res = add_tx_indicator_receiver => {
+    // if unwrap fails, the tx wasnt forwarded to the gateway client.
+    res.unwrap();
+    // After gateway client fails to add the tx, the p2p runner should have reported the peer.
+    let peer_reported = mock_reported_messages_receiver.next().await.expect("Failed to receive message");
+    assert_eq!(peer_reported, message_metadata.originator_id.private_get_peer_id())
+    }
+    }
+}