diff --git a/packages/testing/src/execution_testing/client_clis/transition_tool.py b/packages/testing/src/execution_testing/client_clis/transition_tool.py
index 99874f296df..aad9f89a921 100644
--- a/packages/testing/src/execution_testing/client_clis/transition_tool.py
+++ b/packages/testing/src/execution_testing/client_clis/transition_tool.py
@@ -266,6 +266,13 @@ def collect_traces(
         for i, r in enumerate(receipts):
             trace_file_name = f"trace-{i}-{r.transaction_hash}.jsonl"
             trace_file_path = temp_dir_path / trace_file_name
+            if not trace_file_path.exists():
+                # Transaction was rejected mid-processing (e.g. EIP-3607
+                # collision): the receipt exists but the tracer's
+                # TransactionEnd event never fired, so no trace file was
+                # written. Record an empty trace for this tx.
+                traces.append(TransactionTraces(traces=[]))
+                continue
             if debug_output_path:
                 shutil.copy(
                     trace_file_path,