diff --git a/crates/blockifier/src/transaction/account_transaction.rs b/crates/blockifier/src/transaction/account_transaction.rs
index fcc673c2789..6a27d70ac6b 100644
--- a/crates/blockifier/src/transaction/account_transaction.rs
+++ b/crates/blockifier/src/transaction/account_transaction.rs
@@ -942,6 +942,10 @@ impl ValidatableTransaction for AccountTransaction {
                     actual: validate_call_info.execution.retdata,
                 });
             }
+        } else if validate_call_info.execution.failed {
+            return Err(TransactionExecutionError::ValidateCairo0Error(
+                validate_call_info.execution.retdata,
+            ));
         }
         Ok(Some(validate_call_info))
     }
diff --git a/crates/blockifier/src/transaction/account_transactions_test.rs b/crates/blockifier/src/transaction/account_transactions_test.rs
index 464a35ee960..de0343fcb6e 100644
--- a/crates/blockifier/src/transaction/account_transactions_test.rs
+++ b/crates/blockifier/src/transaction/account_transactions_test.rs
@@ -64,11 +64,11 @@ use starknet_api::{
 };
 use starknet_types_core::felt::Felt;
 
-use crate::check_tx_execution_error_for_invalid_scenario;
 use crate::context::{BlockContext, TransactionContext};
 use crate::execution::call_info::CallInfo;
 use crate::execution::contract_class::TrackedResource;
 use crate::execution::entry_point::{EntryPointExecutionContext, SierraGasRevertTracker};
+use crate::execution::syscalls::hint_processor::ENTRYPOINT_NOT_FOUND_ERROR;
 use crate::execution::syscalls::SyscallSelector;
 use crate::fee::fee_utils::{
     get_fee_by_gas_vector,
@@ -96,6 +96,7 @@ use crate::transaction::account_transaction::{
     AccountTransaction,
     ExecutionFlags as AccountExecutionFlags,
 };
+use crate::transaction::errors::TransactionExecutionError;
 use crate::transaction::objects::{HasRelatedFeeType, TransactionInfoCreator};
 use crate::transaction::test_utils::{
     all_resource_bounds,
@@ -119,6 +120,7 @@ use crate::transaction::test_utils::{
 use crate::transaction::transaction_types::TransactionType;
 use crate::transaction::transactions::ExecutableTransaction;
 use crate::utils::u64_from_usize;
+use crate::{check_tx_execution_error_for_invalid_scenario, retdata};
 
 #[rstest]
 #[case::cairo1(CairoVersion::Cairo1(RunnableCairo1::Casm))]
@@ -2020,3 +2022,30 @@ fn test_call_contract_that_panics(
         }
     }
 }
+
+#[rstest]
+fn test_missing_validate_entrypoint_rejects(
+    block_context: BlockContext,
+    default_all_resource_bounds: ValidResourceBounds,
+) {
+    let chain_info = &block_context.chain_info;
+    let account = FeatureContract::AccountWithoutValidations(CairoVersion::Cairo0);
+    let test_contract = FeatureContract::TestContract(CairoVersion::Cairo0);
+    let mut state = test_state(chain_info, BALANCE, &[(account, 1u16), (test_contract, 1u16)]);
+    let test_contract_address = test_contract.get_instance_address(0_u16);
+    // Fund the test contract.
+    fund_account(chain_info, test_contract_address, BALANCE, &mut state.state);
+    // Send an invoke transaction with the test contract as the sender.
+    let tx_args = invoke_tx_args! {
+        sender_address: test_contract_address,
+        resource_bounds: default_all_resource_bounds
+    };
+    let result = run_invoke_tx(&mut state, &block_context, tx_args);
+    assert!(result.is_err());
+    let error = result.unwrap_err();
+    assert_matches!(
+        error,
+        TransactionExecutionError::ValidateCairo0Error(ret)
+        if ret == retdata![Felt::from_hex(ENTRYPOINT_NOT_FOUND_ERROR).unwrap()]
+    );
+}
diff --git a/crates/blockifier/src/transaction/errors.rs b/crates/blockifier/src/transaction/errors.rs
index e166d1ad654..b97c9fbda50 100644
--- a/crates/blockifier/src/transaction/errors.rs
+++ b/crates/blockifier/src/transaction/errors.rs
@@ -116,6 +116,8 @@ pub enum TransactionExecutionError {
         storage_address: ContractAddress,
         selector: EntryPointSelector,
     },
+    #[error("Cairo0 validate error with retdata: {0:?}")]
+    ValidateCairo0Error(Retdata),
     #[error(
         "Invalid segment structure: PC {0} was visited, but the beginning of the segment {1} was \
          not."