diff --git a/crates/blockifier/src/execution/entry_point.rs b/crates/blockifier/src/execution/entry_point.rs
index e251e15bff..3f92c3b06c 100644
--- a/crates/blockifier/src/execution/entry_point.rs
+++ b/crates/blockifier/src/execution/entry_point.rs
@@ -31,7 +31,7 @@ use crate::execution::errors::{
     PreExecutionError,
 };
 use crate::execution::execution_utils::execute_entry_point_call_wrapper;
-use crate::execution::stack_trace::extract_trailing_cairo1_revert_trace;
+use crate::execution::stack_trace::{extract_trailing_cairo1_revert_trace, Cairo1RevertHeader};
 use crate::state::state_api::{State, StateResult};
 use crate::transaction::objects::{HasRelatedFeeType, TransactionInfo};
 use crate::transaction::transaction_types::TransactionType;
@@ -182,7 +182,10 @@ impl CallEntryPoint {
             // If the execution of the outer call failed, revert the transction.
             if call_info.execution.failed {
                 return Err(EntryPointExecutionError::ExecutionFailed {
-                    error_trace: extract_trailing_cairo1_revert_trace(call_info),
+                    error_trace: extract_trailing_cairo1_revert_trace(
+                        call_info,
+                        Cairo1RevertHeader::Execution,
+                    ),
                 });
             }
         }
diff --git a/crates/blockifier/src/execution/errors.rs b/crates/blockifier/src/execution/errors.rs
index 208daefccc..43e4885832 100644
--- a/crates/blockifier/src/execution/errors.rs
+++ b/crates/blockifier/src/execution/errors.rs
@@ -82,7 +82,7 @@ impl From<RunnerError> for PostExecutionError {
 pub enum EntryPointExecutionError {
     #[error(transparent)]
     CairoRunError(#[from] CairoRunError),
-    #[error("Execution failed. Failure reason:\n{error_trace}.")]
+    #[error("{error_trace}")]
     ExecutionFailed { error_trace: Cairo1RevertStack },
     #[error("Internal error: {0}")]
     InternalError(String),
diff --git a/crates/blockifier/src/execution/execution_utils.rs b/crates/blockifier/src/execution/execution_utils.rs
index a17b2a71ba..c8a33fc11b 100644
--- a/crates/blockifier/src/execution/execution_utils.rs
+++ b/crates/blockifier/src/execution/execution_utils.rs
@@ -21,27 +21,26 @@ use starknet_api::deprecated_contract_class::Program as DeprecatedProgram;
 use starknet_api::transaction::Calldata;
 use starknet_types_core::felt::Felt;
 
-use super::call_info::CallExecution;
-use super::entry_point::ConstructorEntryPointExecutionResult;
-use super::errors::{
-    ConstructorEntryPointExecutionError,
-    EntryPointExecutionError,
-    PreExecutionError,
-};
-use super::syscalls::hint_processor::ENTRYPOINT_NOT_FOUND_ERROR;
-use crate::execution::call_info::{CallInfo, Retdata};
+use crate::execution::call_info::{CallExecution, CallInfo, Retdata};
 use crate::execution::contract_class::{RunnableContractClass, TrackedResource};
 use crate::execution::entry_point::{
     execute_constructor_entry_point,
     CallEntryPoint,
     ConstructorContext,
+    ConstructorEntryPointExecutionResult,
     EntryPointExecutionContext,
     EntryPointExecutionResult,
 };
-use crate::execution::errors::PostExecutionError;
+use crate::execution::errors::{
+    ConstructorEntryPointExecutionError,
+    EntryPointExecutionError,
+    PostExecutionError,
+    PreExecutionError,
+};
 #[cfg(feature = "cairo_native")]
 use crate::execution::native::entry_point_execution as native_entry_point_execution;
-use crate::execution::stack_trace::extract_trailing_cairo1_revert_trace;
+use crate::execution::stack_trace::{extract_trailing_cairo1_revert_trace, Cairo1RevertHeader};
+use crate::execution::syscalls::hint_processor::ENTRYPOINT_NOT_FOUND_ERROR;
 use crate::execution::{deprecated_entry_point_execution, entry_point_execution};
 use crate::state::errors::StateError;
 use crate::state::state_api::State;
@@ -91,7 +90,10 @@ pub fn execute_entry_point_call_wrapper(
             if call_info.execution.failed && !context.versioned_constants().enable_reverts {
                 // Reverts are disabled.
                 return Err(EntryPointExecutionError::ExecutionFailed {
-                    error_trace: extract_trailing_cairo1_revert_trace(&call_info),
+                    error_trace: extract_trailing_cairo1_revert_trace(
+                        &call_info,
+                        Cairo1RevertHeader::Execution,
+                    ),
                 });
             }
             update_remaining_gas(remaining_gas, &call_info);
diff --git a/crates/blockifier/src/execution/stack_trace.rs b/crates/blockifier/src/execution/stack_trace.rs
index 2a52ea831d..00c003b9a5 100644
--- a/crates/blockifier/src/execution/stack_trace.rs
+++ b/crates/blockifier/src/execution/stack_trace.rs
@@ -98,6 +98,7 @@ impl From<&VmExceptionFrame> for String {
 #[cfg_attr(feature = "transaction_serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum Frame {
     EntryPoint(EntryPointErrorFrame),
+    Cairo1Tail(Cairo1RevertStack),
     Vm(VmExceptionFrame),
     StringFrame(String),
 }
@@ -106,6 +107,7 @@ impl From<&Frame> for String {
     fn from(value: &Frame) -> Self {
         match value {
             Frame::EntryPoint(entry_point_frame) => entry_point_frame.into(),
+            Frame::Cairo1Tail(cairo1_revert_stack) => cairo1_revert_stack.to_string(),
             Frame::Vm(vm_exception_frame) => vm_exception_frame.into(),
             Frame::StringFrame(error) => error.clone(),
         }
@@ -114,19 +116,25 @@ impl From<&Frame> for String {
 
 impl From<EntryPointErrorFrame> for Frame {
     fn from(value: EntryPointErrorFrame) -> Self {
-        Frame::EntryPoint(value)
+        Self::EntryPoint(value)
+    }
+}
+
+impl From<Cairo1RevertStack> for Frame {
+    fn from(value: Cairo1RevertStack) -> Self {
+        Self::Cairo1Tail(value)
     }
 }
 
 impl From<VmExceptionFrame> for Frame {
     fn from(value: VmExceptionFrame) -> Self {
-        Frame::Vm(value)
+        Self::Vm(value)
     }
 }
 
 impl From<String> for Frame {
     fn from(value: String) -> Self {
-        Frame::StringFrame(value)
+        Self::StringFrame(value)
     }
 }
 
@@ -157,7 +165,8 @@ impl ErrorStack {
         self.stack.push(frame);
     }
 }
-#[derive(Debug)]
+#[cfg_attr(feature = "transaction_serde", derive(serde::Serialize, serde::Deserialize))]
+#[derive(Clone, Debug)]
 pub struct Cairo1RevertFrame {
     pub contract_address: ContractAddress,
     pub class_hash: Option<ClassHash>,
@@ -199,8 +208,30 @@ impl Display for Cairo1RevertFrame {
     }
 }
 
-#[derive(Debug)]
+#[cfg_attr(feature = "transaction_serde", derive(serde::Serialize, serde::Deserialize))]
+#[derive(Clone, Copy, Debug)]
+pub enum Cairo1RevertHeader {
+    Execution,
+    Validation,
+}
+
+impl Display for Cairo1RevertHeader {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Self::Execution => "Execution failed. Failure reason:",
+                Self::Validation => "The `validate` entry point panicked with:",
+            }
+        )
+    }
+}
+
+#[cfg_attr(feature = "transaction_serde", derive(serde::Serialize, serde::Deserialize))]
+#[derive(Clone, Debug)]
 pub struct Cairo1RevertStack {
+    pub header: Cairo1RevertHeader,
     pub stack: Vec<Cairo1RevertFrame>,
     pub last_retdata: Retdata,
 }
@@ -218,15 +249,20 @@ impl Display for Cairo1RevertStack {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         // Total string length is limited by TRACE_LENGTH_CAP.
 
+        let header = format!("{}", self.header);
+        let tail = ".\n";
+
         // Prioritize the failure reason felts over the frames.
-        // If the failure reason is too long to include a minimal frame trace, display only the
-        // failure reason (truncated if necessary).
+        // If the failure reason is too long to include a minimal frame trace + header + newline,
+        // display only the failure reason (truncated if necessary).
         let failure_reason = format_panic_data(&self.last_retdata.0);
-        if failure_reason.len() >= TRACE_LENGTH_CAP - *MIN_CAIRO1_FRAMES_STACK_LENGTH {
-            let output = if failure_reason.len() <= TRACE_LENGTH_CAP {
-                failure_reason
+        let string_without_frames =
+            [header.clone(), failure_reason.clone(), tail.into()].join("\n");
+        if string_without_frames.len() >= TRACE_LENGTH_CAP - *MIN_CAIRO1_FRAMES_STACK_LENGTH - 1 {
+            let output = if string_without_frames.len() <= TRACE_LENGTH_CAP {
+                string_without_frames
             } else {
-                failure_reason
+                string_without_frames
                     .chars()
                     .take(TRACE_LENGTH_CAP - Self::TRUNCATION_SEPARATOR.len())
                     .collect::<String>()
@@ -235,12 +271,12 @@ impl Display for Cairo1RevertStack {
             return write!(f, "{}", output);
         }
 
-        let untruncated_string = self
-            .stack
-            .iter()
-            .map(|frame| frame.to_string())
+        let untruncated_string = [header.clone()]
+            .into_iter()
+            .chain(self.stack.iter().map(|frame| frame.to_string()))
             .chain([failure_reason.clone()])
-            .join("\n");
+            .join("\n")
+            + tail;
         if untruncated_string.len() <= TRACE_LENGTH_CAP {
             return write!(f, "{}", untruncated_string);
         }
@@ -255,15 +291,16 @@ impl Display for Cairo1RevertStack {
         let final_string =
             match (self.stack.get(..self.stack.len() - n_frames_to_drop - 1), self.stack.last()) {
                 (Some(frames), Some(last_frame)) => {
-                    let combined_string = frames
-                        .iter()
-                        .map(|frame| frame.to_string())
+                    let combined_string = [header]
+                        .into_iter()
+                        .chain(frames.iter().map(|frame| frame.to_string()))
                         .chain([
                             String::from(Self::TRUNCATION_SEPARATOR),
                             last_frame.to_string(),
                             failure_reason,
                         ])
-                        .join("\n");
+                        .join("\n")
+                        + tail;
                     if combined_string.len() <= TRACE_LENGTH_CAP {
                         combined_string
                     } else {
@@ -286,9 +323,15 @@ impl Display for Cairo1RevertStack {
     }
 }
 
-pub fn extract_trailing_cairo1_revert_trace(root_call: &CallInfo) -> Cairo1RevertStack {
-    let fallback_value =
-        Cairo1RevertStack { stack: vec![], last_retdata: root_call.execution.retdata.clone() };
+pub fn extract_trailing_cairo1_revert_trace(
+    root_call: &CallInfo,
+    header: Cairo1RevertHeader,
+) -> Cairo1RevertStack {
+    let fallback_value = Cairo1RevertStack {
+        header,
+        stack: vec![],
+        last_retdata: root_call.execution.retdata.clone(),
+    };
     let entrypoint_failed_felt = Felt::from_hex(ENTRYPOINT_FAILED_ERROR)
         .unwrap_or_else(|_| panic!("{ENTRYPOINT_FAILED_ERROR} does not fit in a felt."));
 
@@ -336,6 +379,7 @@ pub fn extract_trailing_cairo1_revert_trace(root_call: &CallInfo) -> Cairo1Rever
     // If error_calls is empty, that means the root call is non-failing; return the fallback value.
     let Some(last_call) = error_calls.last() else { return fallback_value };
     Cairo1RevertStack {
+        header,
         stack: error_calls.iter().map(Cairo1RevertFrame::from).collect(),
         last_retdata: last_call.execution.retdata.clone(),
     }
@@ -376,6 +420,11 @@ pub fn gen_tx_execution_error_trace(error: &TransactionExecutionError) -> ErrorS
             constructor_selector.as_ref(),
             PreambleType::Constructor,
         ),
+        TransactionExecutionError::PanicInValidate { panic_reason } => {
+            let mut stack = ErrorStack::default();
+            stack.push(panic_reason.clone().into());
+            stack
+        }
         _ => {
             // Top-level error is unrelated to Cairo execution, no "real" frames.
             let mut stack = ErrorStack::default();
@@ -636,6 +685,9 @@ fn extract_entry_point_execution_error_into_stack_trace(
         EntryPointExecutionError::CairoRunError(cairo_run_error) => {
             extract_cairo_run_error_into_stack_trace(error_stack, depth, cairo_run_error)
         }
+        EntryPointExecutionError::ExecutionFailed { error_trace } => {
+            error_stack.push(error_trace.clone().into())
+        }
         _ => error_stack.push(format!("{}\n", entry_point_error).into()),
     }
 }
diff --git a/crates/blockifier/src/execution/stack_trace_test.rs b/crates/blockifier/src/execution/stack_trace_test.rs
index f7e3ac97af..7eac1835c2 100644
--- a/crates/blockifier/src/execution/stack_trace_test.rs
+++ b/crates/blockifier/src/execution/stack_trace_test.rs
@@ -27,6 +27,7 @@ use crate::execution::entry_point::CallEntryPoint;
 use crate::execution::errors::EntryPointExecutionError;
 use crate::execution::stack_trace::{
     extract_trailing_cairo1_revert_trace,
+    Cairo1RevertHeader,
     Cairo1RevertStack,
     MIN_CAIRO1_FRAME_LENGTH,
     TRACE_LENGTH_CAP,
@@ -617,7 +618,8 @@ An ASSERT_EQ instruction failed: 1 != 0.
             "The `validate` entry point panicked with:
 Error in contract (contract address: {contract_address:#064x}, class hash: {:#064x}, selector: \
              {selector:#064x}):
-0x496e76616c6964207363656e6172696f ('Invalid scenario').",
+0x496e76616c6964207363656e6172696f ('Invalid scenario').
+",
             class_hash.0
         ),
     };
@@ -840,7 +842,7 @@ Error in contract (contract address: {expected_address:#064x}, class hash: {:#06
 #[test]
 fn test_min_cairo1_frame_length() {
     let failure_hex = "0xdeadbeef";
-    let call_info = CallInfo {
+    let call_info_1_frame = CallInfo {
         call: CallEntryPoint {
             class_hash: Some(ClassHash::default()),
             storage_address: ContractAddress::default(),
@@ -854,11 +856,27 @@ fn test_min_cairo1_frame_length() {
         },
         ..Default::default()
     };
-    let error_stack = extract_trailing_cairo1_revert_trace(&call_info);
-    let error_string = error_stack.to_string();
-    // Frame, newline, failure reason.
-    // Min frame length includes the newline.
-    assert_eq!(error_string.len(), *MIN_CAIRO1_FRAME_LENGTH + failure_hex.len());
+    let call_info_2_frames = CallInfo {
+        call: CallEntryPoint {
+            class_hash: Some(ClassHash::default()),
+            storage_address: ContractAddress::default(),
+            entry_point_selector: EntryPointSelector::default(),
+            ..Default::default()
+        },
+        execution: CallExecution {
+            retdata: Retdata(vec![felt!(failure_hex), felt!(ENTRYPOINT_FAILED_ERROR)]),
+            failed: true,
+            ..Default::default()
+        },
+        inner_calls: vec![call_info_1_frame.clone()],
+        ..Default::default()
+    };
+    let error_stack_1_frame =
+        extract_trailing_cairo1_revert_trace(&call_info_1_frame, Cairo1RevertHeader::Execution);
+    let error_stack_2_frames =
+        extract_trailing_cairo1_revert_trace(&call_info_2_frames, Cairo1RevertHeader::Execution);
+    let diff = error_stack_2_frames.to_string().len() - error_stack_1_frame.to_string().len();
+    assert_eq!(diff, *MIN_CAIRO1_FRAME_LENGTH);
 }
 
 #[rstest]
@@ -901,46 +919,49 @@ fn test_cairo1_revert_error_truncation(
     }
 
     // Check that the error message is structured as expected.
-    let error_stack = extract_trailing_cairo1_revert_trace(&next_call_info);
+    let header_type = Cairo1RevertHeader::Execution;
+    let header_str = header_type.to_string();
+    let tail_str = ".\n";
+    let error_stack = extract_trailing_cairo1_revert_trace(&next_call_info, header_type);
     let error_string = error_stack.to_string();
     let first_frame = error_stack.stack.first().unwrap().to_string();
     let last_frame = error_stack.stack.last().unwrap().to_string();
-    match scenario {
+    let (expected_head, expected_tail) = match scenario {
         // Frames truncated, entire failure reason (a single felt) is output.
         "too_many_frames" => {
-            assert!(error_string.starts_with(&format!("{first_frame}\n")));
-            assert!(
-                error_string.ends_with(
-                    &[
-                        Cairo1RevertStack::TRUNCATION_SEPARATOR.into(),
-                        last_frame,
-                        // One failure felt.
-                        failure_felt.to_string(),
-                    ]
-                    .join("\n")
-                )
-            );
+            (
+                format!("{header_str}\n{first_frame}\n"),
+                [
+                    Cairo1RevertStack::TRUNCATION_SEPARATOR.into(),
+                    last_frame,
+                    // One failure felt.
+                    format!("{failure_felt}{tail_str}"),
+                ]
+                .join("\n"),
+            )
         }
         // A single frame, but failure reason itself is too long. No frames printed.
-        "too_much_retdata" => {
-            assert!(error_string.starts_with(&format!("({failure_felt}")));
-            assert!(error_string.ends_with(Cairo1RevertStack::TRUNCATION_SEPARATOR));
-        }
+        "too_much_retdata" => (
+            format!("{header_str}\n({failure_felt}"),
+            Cairo1RevertStack::TRUNCATION_SEPARATOR.into(),
+        ),
         // Too many frames and too much retdata - retdata takes precedence.
         "both_too_much" => {
-            assert!(error_string.starts_with(&format!("{first_frame}\n")));
-            let retdata_tail =
-                format!("({}{failure_felt})", format!("{failure_felt}, ").repeat(n_retdata - 1));
-            assert!(
-                error_string.ends_with(
-                    &[Cairo1RevertStack::TRUNCATION_SEPARATOR.into(), last_frame, retdata_tail]
-                        .join("\n")
-                )
+            let retdata_tail = format!(
+                "({}{failure_felt}){tail_str}",
+                format!("{failure_felt}, ").repeat(n_retdata - 1)
             );
+            (
+                format!("{header_str}\n{first_frame}\n"),
+                [Cairo1RevertStack::TRUNCATION_SEPARATOR.into(), last_frame, retdata_tail]
+                    .join("\n"),
+            )
         }
         _ => panic!("Test not implemented for {n_frames} frames."),
-    }
+    };
     assert!(error_string.len() <= TRACE_LENGTH_CAP);
+    assert_eq!(error_string[..expected_head.len()], expected_head);
+    assert_eq!(error_string[error_string.len() - expected_tail.len()..], expected_tail);
 }
 
 #[test]
@@ -953,14 +974,15 @@ fn test_cairo1_stack_extraction_inner_call_successful() {
         ..Default::default()
     };
     let error = EntryPointExecutionError::ExecutionFailed {
-        error_trace: extract_trailing_cairo1_revert_trace(&callinfo),
+        error_trace: extract_trailing_cairo1_revert_trace(&callinfo, Cairo1RevertHeader::Execution),
     };
     assert_eq!(
         error.to_string(),
         format!(
             "Execution failed. Failure reason:
 Error in contract (contract address: {:#064x}, class hash: _, selector: {:#064x}):
-{failure_reason_str}.",
+{failure_reason_str}.
+",
             ContractAddress::default().0.key(),
             EntryPointSelector::default().0
         )
@@ -991,8 +1013,8 @@ fn test_ambiguous_inner_cairo1_failure() {
         ..Default::default()
     };
     assert_matches!(
-        extract_trailing_cairo1_revert_trace(&call_info),
-        Cairo1RevertStack { stack, last_retdata }
+        extract_trailing_cairo1_revert_trace(&call_info, Cairo1RevertHeader::Execution),
+        Cairo1RevertStack { stack, last_retdata, .. }
         if stack.is_empty() && last_retdata == outer_retdata
     );
 }
@@ -1032,8 +1054,8 @@ fn test_inner_cairo1_failure_not_last(#[values(true, false)] last_is_failed: boo
         ..Default::default()
     };
     assert_matches!(
-        extract_trailing_cairo1_revert_trace(&call_info),
-        Cairo1RevertStack { stack, last_retdata }
+        extract_trailing_cairo1_revert_trace(&call_info, Cairo1RevertHeader::Execution),
+        Cairo1RevertStack { stack, last_retdata, .. }
         if stack.len() == 2 && last_retdata == first_inner_retdata
     );
 }
@@ -1050,8 +1072,8 @@ fn test_cairo1_stack_extraction_not_failure_fallback() {
         ..Default::default()
     };
     assert_matches!(
-        extract_trailing_cairo1_revert_trace(&successful_call),
-        Cairo1RevertStack { stack, last_retdata }
+        extract_trailing_cairo1_revert_trace(&successful_call, Cairo1RevertHeader::Execution),
+        Cairo1RevertStack { stack, last_retdata, .. }
         if stack.is_empty() && last_retdata == expected_retdata
     );
 }
diff --git a/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs b/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs
index aed94c351f..022555e141 100644
--- a/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs
+++ b/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs
@@ -3,7 +3,7 @@ use starknet_api::felt;
 
 use crate::execution::call_info::{CallExecution, CallInfo, Retdata};
 use crate::execution::errors::EntryPointExecutionError;
-use crate::execution::stack_trace::extract_trailing_cairo1_revert_trace;
+use crate::execution::stack_trace::{extract_trailing_cairo1_revert_trace, Cairo1RevertHeader};
 
 #[test]
 fn test_syscall_failure_format() {
@@ -14,14 +14,15 @@ fn test_syscall_failure_format() {
         ..Default::default()
     };
     let error = EntryPointExecutionError::ExecutionFailed {
-        error_trace: extract_trailing_cairo1_revert_trace(&callinfo),
+        error_trace: extract_trailing_cairo1_revert_trace(&callinfo, Cairo1RevertHeader::Execution),
     };
     assert_eq!(
         error.to_string(),
         format!(
             "Execution failed. Failure reason:
 Error in contract (contract address: {:#064x}, class hash: _, selector: {:#064x}):
-{execution_failure} ('Execution failure').",
+{execution_failure} ('Execution failure').
+",
             ContractAddress::default().0.key(),
             EntryPointSelector::default().0
         )
diff --git a/crates/blockifier/src/transaction/account_transaction.rs b/crates/blockifier/src/transaction/account_transaction.rs
index 76bad0b168..29d5d4b92d 100644
--- a/crates/blockifier/src/transaction/account_transaction.rs
+++ b/crates/blockifier/src/transaction/account_transaction.rs
@@ -26,7 +26,7 @@ use crate::context::{BlockContext, TransactionContext};
 use crate::execution::call_info::CallInfo;
 use crate::execution::contract_class::RunnableContractClass;
 use crate::execution::entry_point::{CallEntryPoint, CallType, EntryPointExecutionContext};
-use crate::execution::stack_trace::extract_trailing_cairo1_revert_trace;
+use crate::execution::stack_trace::{extract_trailing_cairo1_revert_trace, Cairo1RevertHeader};
 use crate::fee::fee_checks::{FeeCheckReportFields, PostExecutionReport};
 use crate::fee::fee_utils::{
     get_fee_by_gas_vector,
@@ -945,7 +945,10 @@ impl ValidatableTransaction for AccountTransaction {
 
             if validate_call_info.execution.failed {
                 return Err(TransactionExecutionError::PanicInValidate {
-                    panic_reason: extract_trailing_cairo1_revert_trace(&validate_call_info),
+                    panic_reason: extract_trailing_cairo1_revert_trace(
+                        &validate_call_info,
+                        Cairo1RevertHeader::Validation,
+                    ),
                 });
             }
 
diff --git a/crates/blockifier/src/transaction/errors.rs b/crates/blockifier/src/transaction/errors.rs
index 180bb9b710..05325ce62c 100644
--- a/crates/blockifier/src/transaction/errors.rs
+++ b/crates/blockifier/src/transaction/errors.rs
@@ -90,7 +90,7 @@ pub enum TransactionExecutionError {
     FeeCheckError(#[from] FeeCheckError),
     #[error(transparent)]
     FromStr(#[from] FromStrError),
-    #[error("The `validate` entry point panicked with:\n{panic_reason}.")]
+    #[error("{panic_reason}")]
     PanicInValidate { panic_reason: Cairo1RevertStack },
     #[error("The `validate` entry point should return `VALID`. Got {actual:?}.")]
     InvalidValidateReturnData { actual: Retdata },