diff --git a/crates/starknet_batcher/src/batcher_test.rs b/crates/starknet_batcher/src/batcher_test.rs
index 73f86e0a97..486514733b 100644
--- a/crates/starknet_batcher/src/batcher_test.rs
+++ b/crates/starknet_batcher/src/batcher_test.rs
@@ -262,7 +262,7 @@ async fn send_finish_to_an_invalid_proposal() {
         .return_once(|_, _, _, _| { async move { Ok(()) } }.boxed());
 
     let proposal_error = GetProposalResultError::BlockBuilderError(Arc::new(
-        BlockBuilderError::FailOnError(TransactionExecutorError::BlockFull),
+        BlockBuilderError::FailOnError(TransactionExecutorError::BlockFull.to_string()),
     ));
     proposal_manager
         .expect_wrap_await_proposal_commitment()
diff --git a/crates/starknet_batcher/src/block_builder.rs b/crates/starknet_batcher/src/block_builder.rs
index a16e974eee..7b381f9e68 100644
--- a/crates/starknet_batcher/src/block_builder.rs
+++ b/crates/starknet_batcher/src/block_builder.rs
@@ -14,7 +14,6 @@ use blockifier::context::{BlockContext, ChainInfo};
 use blockifier::state::cached_state::CommitmentStateDiff;
 use blockifier::state::errors::StateError;
 use blockifier::state::global_cache::GlobalContractCache;
-use blockifier::transaction::errors::TransactionExecutionError as BlockifierTransactionExecutionError;
 use blockifier::transaction::objects::TransactionExecutionInfo;
 use blockifier::transaction::transaction_execution::Transaction as BlockifierTransaction;
 use blockifier::versioned_constants::{VersionedConstants, VersionedConstantsOverrides};
@@ -48,11 +47,9 @@ pub enum BlockBuilderError {
     #[error(transparent)]
     GetTransactionError(#[from] TransactionProviderError),
     #[error(transparent)]
-    TransactionExecutionError(#[from] BlockifierTransactionExecutionError),
-    #[error(transparent)]
     StreamTransactionsError(#[from] tokio::sync::mpsc::error::SendError<Transaction>),
     #[error("Build block with fail_on_err mode, failed on error {}.", _0)]
-    FailOnError(BlockifierTransactionExecutorError),
+    FailOnError(String),
     #[error("The block builder was aborted.")]
     Aborted,
 }
@@ -120,7 +117,14 @@ impl BlockBuilderTrait for BlockBuilder {
         let mut block_is_full = false;
         let mut execution_infos = IndexMap::new();
         // TODO(yael 6/10/2024): delete the timeout condition once the executor has a timeout
-        while !block_is_full && tokio::time::Instant::now() < self.execution_params.deadline {
+        while !block_is_full {
+            if tokio::time::Instant::now() >= self.execution_params.deadline {
+                info!("Block builder deadline reached.");
+                if self.execution_params.fail_on_err {
+                    return Err(BlockBuilderError::FailOnError("deadline reached".to_string()));
+                }
+                break;
+            }
             if self.abort_signal_receiver.try_recv().is_ok() {
                 info!("Received abort signal. Aborting block builder.");
                 return Err(BlockBuilderError::Aborted);
@@ -189,7 +193,7 @@ async fn collect_execution_results_and_stream_txs(
             Err(err) => {
                 debug!("Transaction {:?} failed with error: {}.", input_tx, err);
                 if fail_on_err {
-                    return Err(BlockBuilderError::FailOnError(err));
+                    return Err(BlockBuilderError::FailOnError(err.to_string()));
                 }
             }
         }
diff --git a/crates/starknet_batcher/src/block_builder_test.rs b/crates/starknet_batcher/src/block_builder_test.rs
index 0f6f690645..f28e5415a1 100644
--- a/crates/starknet_batcher/src/block_builder_test.rs
+++ b/crates/starknet_batcher/src/block_builder_test.rs
@@ -152,21 +152,27 @@ fn block_full_test_expectations(
     (mock_transaction_executor, mock_tx_provider, expected_block_artifacts)
 }
 
-fn test_expectations_with_delay(
-    input_txs: &[Transaction],
-) -> (MockTransactionExecutorTrait, MockTransactionProvider, BlockExecutionArtifacts) {
-    let first_chunk = input_txs[0..TX_CHUNK_SIZE].to_vec();
-    let first_chunk_copy = first_chunk.clone();
+fn mock_transaction_executor_with_delay(
+    input_txs: Vec<Transaction>,
+) -> MockTransactionExecutorTrait {
     let mut mock_transaction_executor = MockTransactionExecutorTrait::new();
-
     mock_transaction_executor
         .expect_add_txs_to_block()
         .times(1)
-        .withf(move |blockifier_input| compare_tx_hashes(&first_chunk, blockifier_input))
+        .withf(move |blockifier_input| compare_tx_hashes(&input_txs, blockifier_input))
         .return_once(move |_| {
             std::thread::sleep(std::time::Duration::from_secs(BLOCK_GENERATION_DEADLINE_SECS));
             (0..TX_CHUNK_SIZE).map(move |_| Ok(execution_info())).collect()
         });
+    mock_transaction_executor
+}
+
+fn test_expectations_with_delay(
+    input_txs: &[Transaction],
+) -> (MockTransactionExecutorTrait, MockTransactionProvider, BlockExecutionArtifacts) {
+    let first_chunk = input_txs[0..TX_CHUNK_SIZE].to_vec();
+    let first_chunk_copy = first_chunk.clone();
+    let mut mock_transaction_executor = mock_transaction_executor_with_delay(first_chunk);
 
     let expected_block_artifacts =
         set_close_block_expectations(&mut mock_transaction_executor, TX_CHUNK_SIZE);
@@ -416,8 +422,32 @@ async fn test_validate_block_with_error() {
     .unwrap_err();
 
     assert_matches!(
-        result,
-        BlockBuilderError::FailOnError(BlockifierTransactionExecutorError::BlockFull)
+        result, BlockBuilderError::FailOnError(err)
+        if err == BlockifierTransactionExecutorError::BlockFull.to_string()
+    );
+}
+
+#[tokio::test]
+async fn test_validate_block_deadline_reached() {
+    let input_txs = test_txs(0..3);
+    let mock_transaction_executor = mock_transaction_executor_with_delay(input_txs.clone());
+    let mock_tx_provider = mock_tx_provider_limited_calls(1, vec![input_txs]);
+
+    let (_abort_sender, abort_receiver) = tokio::sync::oneshot::channel();
+    let result = run_build_block(
+        mock_transaction_executor,
+        mock_tx_provider,
+        None,
+        true,
+        abort_receiver,
+        BLOCK_GENERATION_DEADLINE_SECS,
+    )
+    .await
+    .unwrap_err();
+
+    assert_matches!(
+        result, BlockBuilderError::FailOnError(err)
+        if err == *"deadline reached"
     );
 }