diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_instances_controller.py b/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_instances_controller.py
index 0ca0ada1..7c23f250 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_instances_controller.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/routes/process_instances_controller.py
@@ -556,29 +556,28 @@ def process_instance_task_list(
     get_task_data: bool = False,
 ) -> flask.wrappers.Response:
     """Process_instance_task_list."""
-    step_detail_query = (
-        db.session.query(SpiffStepDetailsModel)
-        .filter(
-            SpiffStepDetailsModel.process_instance_id == process_instance.id,
-        )
+    step_detail_query = db.session.query(SpiffStepDetailsModel).filter(
+        SpiffStepDetailsModel.process_instance_id == process_instance.id,
     )
 
     if spiff_step > 0:
-        step_detail_query = step_detail_query.filter(SpiffStepDetailsModel.spiff_step <= spiff_step)
+        step_detail_query = step_detail_query.filter(
+            SpiffStepDetailsModel.spiff_step <= spiff_step
+        )
 
     step_details = step_detail_query.all()
-    bpmn_json = json.loads(process_instance.bpmn_json)
-    tasks = bpmn_json['tasks']
+    bpmn_json = json.loads(process_instance.bpmn_json or "{}")
+    tasks = bpmn_json["tasks"]
 
     # if step_detail is not None and process_instance.bpmn_json is not None:
     for step_detail in step_details:
-        print(f"step_detail.task_id: {step_detail.task_id}")
-        print(f"step_detail.bpmn_task_identifier: {step_detail.bpmn_task_identifier}")
         if step_detail.task_id in tasks:
-            task_data = step_detail.task_json['task_data'] | step_detail.task_json['python_env']
+            task_data = (
+                step_detail.task_json["task_data"] | step_detail.task_json["python_env"]
+            )
             if task_data is None:
                 task_data = {}
-            tasks[step_detail.task_id]['data'] = task_data
+            tasks[step_detail.task_id]["data"] = task_data
 
     process_instance.bpmn_json = json.dumps(bpmn_json)
 
diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py b/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py
index d011c978..dc75ac6a 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py
@@ -682,7 +682,12 @@ class ProcessInstanceProcessor:
             "lane_assignment_id": lane_assignment_id,
         }
 
-    def spiff_step_details_mapping(self, spiff_task: Optional[SpiffTask]=None, start_in_seconds: Optional[float] = 0, end_in_seconds: Optional[float] = 0) -> dict:
+    def spiff_step_details_mapping(
+        self,
+        spiff_task: Optional[SpiffTask] = None,
+        start_in_seconds: Optional[float] = 0,
+        end_in_seconds: Optional[float] = 0,
+    ) -> dict:
         """SaveSpiffStepDetails."""
         # bpmn_json = self.serialize()
         # wf_json = json.loads(bpmn_json)
@@ -696,8 +701,10 @@ class ProcessInstanceProcessor:
             return {}
 
         task_data = default_registry.convert(spiff_task.data)
-        python_env = default_registry.convert(self._script_engine.environment.last_result())
-        
+        python_env = default_registry.convert(
+            self._script_engine.environment.last_result()
+        )
+
         task_json: Dict[str, Any] = {
             # "tasks": wf_json["tasks"],
             # "subprocesses": wf_json["subprocesses"],
@@ -1528,13 +1535,17 @@ class ProcessInstanceProcessor:
 
         def will_complete_task(task: SpiffTask) -> None:
             if should_log(task):
-                current_task_start_in_seconds['time'] = time.time()
+                current_task_start_in_seconds["time"] = time.time()
                 self.increment_spiff_step()
 
         def did_complete_task(task: SpiffTask) -> None:
             if should_log(task):
                 self._script_engine.environment.revise_state_with_task_data(task)
-                step_details.append(self.spiff_step_details_mapping(task, current_task_start_in_seconds['time'], time.time()))
+                step_details.append(
+                    self.spiff_step_details_mapping(
+                        task, current_task_start_in_seconds["time"], time.time()
+                    )
+                )
 
         try:
             self.bpmn_process_instance.refresh_waiting_tasks()