diff --git a/temporalio/common.py b/temporalio/common.py
index 078db968..c70427ea 100644
--- a/temporalio/common.py
+++ b/temporalio/common.py
@@ -1045,29 +1045,34 @@ def _type_hints_from_func(
         args.append(arg_hint)  # type: ignore
     return args, ret
 
+
 @dataclass
 class _SDKInfo:
-    name    : str
-    version : str
-        
+    name: str
+    version: str
+
+
 @dataclass
 class _FileSlice:
-    content    : str
-    lineOffset : int
+    content: str
+    lineOffset: int
+
 
 @dataclass
 class _FileLocation:
-    filePath     : str
-    line         : Optional[int] = -1
-    column       : Optional[int] = -1
-    functionName : Optional[str] = None
-        
+    filePath: str
+    line: Optional[int] = -1
+    column: Optional[int] = -1
+    functionName: Optional[str] = None
+
+
 @dataclass
 class _StackTrace:
-    locations : list[_FileLocation]
-        
+    locations: list[_FileLocation]
+
+
 @dataclass
 class _EnhancedStackTrace:
-    sdk     : _SDKInfo
-    sources : dict[str, _FileSlice]
-    stacks  : list[_StackTrace]
\ No newline at end of file
+    sdk: _SDKInfo
+    sources: dict[str, _FileSlice]
+    stacks: list[_StackTrace]
diff --git a/temporalio/worker/_workflow_instance.py b/temporalio/worker/_workflow_instance.py
index 7e5e0d40..05d81925 100644
--- a/temporalio/worker/_workflow_instance.py
+++ b/temporalio/worker/_workflow_instance.py
@@ -53,6 +53,7 @@
 import temporalio.converter
 import temporalio.exceptions
 import temporalio.workflow
+from temporalio.service import __version__
 
 from ._interceptor import (
     ContinueAsNewInput,
@@ -69,8 +70,6 @@
     WorkflowOutboundInterceptor,
 )
 
-from temporalio.service import __version__
-
 logger = logging.getLogger(__name__)
 
 # Set to true to log all cases where we're ignoring things during delete
@@ -1800,36 +1799,37 @@ def _stack_trace(self) -> str:
                 + "\n".join(traceback.format_list(frames))
             )
         return "\n\n".join(stacks)
-    
+
     def _enhanced_stack_trace(self) -> temporalio.common._EnhancedStackTrace:
         sdk = temporalio.common._SDKInfo("sdk-python", __version__)
 
         sources = dict()
         stacks = []
-        
+
         for task in list(self._tasks):
             for frame in task.get_stack():
                 filename = frame.f_code.co_filename
                 line_number = frame.f_lineno
                 func_name = frame.f_code.co_name
-                
+
                 try:
                     source = inspect.getsourcelines(frame)
-                    code = ''.join(source[0])
+                    code = "".join(source[0])
                     line_number = int(source[1])
                 except OSError as ose:
                     code = "Cannot access code.\n---\n%s" % ose.strerror
                     # TODO possibly include sentinel/property for success of src scrape? work out with ui
                 except Exception:
                     code = "Generic Error.\n\n%s" % traceback.format_exc()
-                
+
                 file_slice = temporalio.common._FileSlice(code, line_number)
-                file_location = temporalio.common._FileLocation(filename, line = line_number, functionName = func_name)
-                
+                file_location = temporalio.common._FileLocation(
+                    filename, line=line_number, functionName=func_name
+                )
+
                 sources["%s %d" % (filename, line_number)] = file_slice
                 stacks.append(file_location)
-                
-                
+
         est = temporalio.common._EnhancedStackTrace(sdk, sources, stacks)
         return est
 
diff --git a/tests/helpers/externalstacktrace.py b/tests/helpers/externalstacktrace.py
index abc6cfa3..61cac39f 100644
--- a/tests/helpers/externalstacktrace.py
+++ b/tests/helpers/externalstacktrace.py
@@ -1,7 +1,8 @@
-from datetime import timedelta
 import asyncio
+from datetime import timedelta
+
+from temporalio import activity, workflow
 
-from temporalio import workflow, activity
 
 @workflow.defn
 class ExternalLongSleepWorkflow:
@@ -14,6 +15,7 @@ async def run(self) -> None:
     def started(self) -> bool:
         return self._started
 
+
 @activity.defn
 async def wait_cancel() -> str:
     try:
@@ -27,6 +29,7 @@ async def wait_cancel() -> str:
     except asyncio.CancelledError:
         return "Got cancelled error, cancelled? " + str(activity.is_cancelled())
 
+
 @workflow.defn
 class ExternalStackTraceWorkflow:
     def __init__(self) -> None:
@@ -48,7 +51,7 @@ async def run(self) -> None:
         await asyncio.wait([asyncio.create_task(v) for v in awaitables])
 
     async def never_completing_coroutine(self) -> None:
-        self._status = "waiting" # with external comment
+        self._status = "waiting"  # with external comment
         await workflow.wait_condition(lambda: False)
 
     @workflow.query
diff --git a/tests/worker/test_workflow.py b/tests/worker/test_workflow.py
index 1e3facef..4a589354 100644
--- a/tests/worker/test_workflow.py
+++ b/tests/worker/test_workflow.py
@@ -107,7 +107,11 @@
     find_free_port,
     new_worker,
 )
-from tests.helpers.externalstacktrace import ExternalStackTraceWorkflow, ExternalLongSleepWorkflow
+from tests.helpers.externalstacktrace import (
+    ExternalLongSleepWorkflow,
+    ExternalStackTraceWorkflow,
+)
+
 
 @workflow.defn
 class HelloWorkflow:
@@ -2097,6 +2101,7 @@ async def status() -> str:
         # TODO(cretz): Do more specific checks once we clean up traces
         assert "never_completing_coroutine" in trace
 
+
 async def test_workflow_enhanced_stack_trace(client: Client):
     async with new_worker(
         client, StackTraceWorkflow, LongSleepWorkflow, activities=[wait_cancel]
@@ -2115,29 +2120,38 @@ async def status() -> str:
 
         # Send stack trace query
         trace = await handle.query("__enhanced_stack_trace")
-        
-        assert "never_completing_coroutine" in [ stack['functionName'] for stack in trace['stacks'] ]
+
+        assert "never_completing_coroutine" in [
+            stack["functionName"] for stack in trace["stacks"]
+        ]
         # first line of never_completing_coroutine
-        assert 'self._status = "waiting"' in str(trace['sources'])
-        assert trace['sdk']['version'] == __version__
+        assert 'self._status = "waiting"' in str(trace["sources"])
+        assert trace["sdk"]["version"] == __version__
 
     async with new_worker(
-        client, ExternalStackTraceWorkflow, ExternalLongSleepWorkflow, activities=[wait_cancel]
+        client,
+        ExternalStackTraceWorkflow,
+        ExternalLongSleepWorkflow,
+        activities=[wait_cancel],
     ) as worker:
         handle = await client.start_workflow(
             ExternalStackTraceWorkflow.run,
             id=f"workflow-{uuid.uuid4()}",
-            task_queue=worker.task_queue
+            task_queue=worker.task_queue,
         )
 
         await assert_eq_eventually("waiting", status)
 
         trace = await handle.query("__enhanced_stack_trace")
 
-        assert "never_completing_coroutine" in [ stack['functionName'] for stack in trace['stacks'] ]
-        assert 'self._status = "waiting" # with external comment' in str(trace['sources'])
-        assert 'externalstacktrace.py' in str(trace['sources'])
-        assert trace['sdk']['version'] == __version__
+        assert "never_completing_coroutine" in [
+            stack["functionName"] for stack in trace["stacks"]
+        ]
+        assert 'self._status = "waiting" # with external comment' in str(
+            trace["sources"]
+        )
+        assert "externalstacktrace.py" in str(trace["sources"])
+        assert trace["sdk"]["version"] == __version__
 
 
 @dataclass