diff --git a/studio/backend/routes/chat_history.py b/studio/backend/routes/chat_history.py
index b227431a27..3bb6bd0b93 100644
--- a/studio/backend/routes/chat_history.py
+++ b/studio/backend/routes/chat_history.py
@@ -672,9 +672,7 @@ async def record_import_ledger(
 
 
 @router.delete("")
-async def clear_history(
-    request: Request, current_subject: str = Depends(get_current_subject)
-):
+async def clear_history(request: Request, current_subject: str = Depends(get_current_subject)):
     _cancel_active_research(request, [thread["id"] for thread in list_chat_threads()])
     clear_chat_history()
     return {"status": "deleted"}
diff --git a/studio/backend/routes/research_runs.py b/studio/backend/routes/research_runs.py
index c3dfd48f17..087f889055 100644
--- a/studio/backend/routes/research_runs.py
+++ b/studio/backend/routes/research_runs.py
@@ -233,9 +233,7 @@ def _sanitize_config(payload: CreateResearchRun, thread: dict) -> dict:
         # container both evades the sensitive-key scan when its inner keys are unlisted (e.g.
         # {"kb_id": {"auth": "sk-..."}}) and would reach retrieval code that expects a scalar scope
         # id, so reject any non-scalar value outright.
-        non_scalar = any(
-            isinstance(value, (dict, list, tuple)) for value in rag_scope.values()
-        )
+        non_scalar = any(isinstance(value, (dict, list, tuple)) for value in rag_scope.values())
         if unknown_rag or non_scalar or _contains_sensitive_key(rag_scope):
             raise HTTPException(status_code = 400, detail = "Unsupported or sensitive ragScope field")
     budgets = {
diff --git a/studio/backend/tests/test_research_runs_storage.py b/studio/backend/tests/test_research_runs_storage.py
index 24f790122e..0364bfd2de 100644
--- a/studio/backend/tests/test_research_runs_storage.py
+++ b/studio/backend/tests/test_research_runs_storage.py
@@ -686,9 +686,7 @@ def test_delete_thread_cancels_active_research_run(research_home):
     cancelled: list[str] = []
     request = SimpleNamespace(
         app = SimpleNamespace(
-            state = SimpleNamespace(
-                research_supervisor = SimpleNamespace(cancel = cancelled.append)
-            )
+            state = SimpleNamespace(research_supervisor = SimpleNamespace(cancel = cancelled.append))
         )
     )
     chat_history._cancel_active_research(request, ["thread-1"])
@@ -1265,13 +1263,16 @@ def test_planner_prompt_shields_untrusted_conversation(research_home, monkeypatc
     )
     _create(user_message_id = "user-inj", assistant_message_id = None)
 
-    supervisor = worker.ResearchSupervisor(
-        SimpleNamespace(state = SimpleNamespace(server_port = 1))
-    )
+    supervisor = worker.ResearchSupervisor(SimpleNamespace(state = SimpleNamespace(server_port = 1)))
     captured: dict = {}
 
     async def fake_stream_completion(
-        run, messages, *, json_mode = False, report_progress = True, **kwargs
+        run,
+        messages,
+        *,
+        json_mode = False,
+        report_progress = True,
+        **kwargs,
     ):
         captured["planner"] = messages[1]["content"]
         return json.dumps(_plan()), "Planned.", "stop"