diff --git a/backend/chatsky_ui/api/api_v1/api.py b/backend/chatsky_ui/api/api_v1/api.py
index 4461812c..215a4fee 100644
--- a/backend/chatsky_ui/api/api_v1/api.py
+++ b/backend/chatsky_ui/api/api_v1/api.py
@@ -7,5 +7,7 @@
 
 api_router.include_router(config.router, prefix="/".join([settings.API_V1_STR, "config"]), tags=["config"])
 api_router.include_router(flows.router, prefix="/".join([settings.API_V1_STR, "flows"]), tags=["flows"])
-api_router.include_router(chatsky_services.router, prefix="/".join([settings.API_V1_STR, "services"]), tags=["services"])
+api_router.include_router(
+    chatsky_services.router, prefix="/".join([settings.API_V1_STR, "services"]), tags=["services"]
+)
 api_router.include_router(bot.router, prefix="/".join([settings.API_V1_STR, "bot"]), tags=["bot"])
diff --git a/backend/chatsky_ui/clients/chatsky_client.py b/backend/chatsky_ui/clients/chatsky_client.py
index 34efc0a6..0822f707 100644
--- a/backend/chatsky_ui/clients/chatsky_client.py
+++ b/backend/chatsky_ui/clients/chatsky_client.py
@@ -4,9 +4,9 @@
 from chatsky.core import script_parsing
 
 AUTO_COMPLETION_MAP = {
-    "ExactMatch": 'await cnd.ExactMatch("hello")(ctx)', # TODO: delete Message as it's redundant in the new version
+    "ExactMatch": 'await cnd.ExactMatch("hello")(ctx)',  # TODO: delete Message as it's redundant in the new version
     "Regexp": 'await cnd.Regexp("how are you")(ctx)',
-    "Any": 'cnd.Any([hi_lower_case_condition, cnd.ExactMatch(hello)])(ctx)', # TODO: the same
+    "Any": "cnd.Any([hi_lower_case_condition, cnd.ExactMatch(hello)])(ctx)",  # TODO: the same
     "All": 'cnd.All([cnd.Regexp("talk"), cnd.Regexp("about.*music")])(ctx)',
 }
 
diff --git a/backend/chatsky_ui/services/condition_finder.py b/backend/chatsky_ui/services/condition_finder.py
index 96371bc7..a60b9980 100644
--- a/backend/chatsky_ui/services/condition_finder.py
+++ b/backend/chatsky_ui/services/condition_finder.py
@@ -6,6 +6,7 @@
 
 logger = get_logger(__name__)
 
+
 class ServiceReplacer(NodeTransformer):
     def __init__(self, new_services: List[str]):
         self.new_services_classes = self._get_classes_def(new_services)
diff --git a/backend/chatsky_ui/services/json_converter.py b/backend/chatsky_ui/services/json_converter.py
index f4b1bf78..f487c02e 100644
--- a/backend/chatsky_ui/services/json_converter.py
+++ b/backend/chatsky_ui/services/json_converter.py
@@ -22,6 +22,7 @@
 
 PRE_TRANSITION = "PRE_TRANSITION"
 
+
 def _get_db_paths(build_id: int) -> Tuple[Path, Path, Path, Path]:
     """Get paths to frontend graph, chatsky script, and chatsky custom conditions files."""
     frontend_graph_path = settings.frontend_flows_path
@@ -74,7 +75,7 @@ def _convert_slots(slots: dict) -> dict:
             if slot_type != "GroupSlot":
                 group_slot[slot_name].update({f"chatsky.slots.{slot_type}": {k: v for k, v in slot_values.items()}})
             else:
-                group_slot[slot_name] =  _convert_slots(slot_values)
+                group_slot[slot_name] = _convert_slots(slot_values)
         return dict(group_slot)
 
     script["slots"] = _convert_slots(flow_graph["slots"])
@@ -82,7 +83,6 @@ def _convert_slots(slots: dict) -> dict:
     return nodes, script
 
 
-
 def _get_condition(nodes: dict, edge: DictConfig) -> Optional[DictConfig]:
     """Get node's condition from `nodes` according to `edge` info."""
     return next(
@@ -93,6 +93,7 @@ def _get_condition(nodes: dict, edge: DictConfig) -> Optional[DictConfig]:
 
 def _add_transitions(nodes: dict, edge: DictConfig, condition: DictConfig, slots: DictConfig) -> None:
     """Add transitions to a node according to `edge` and `condition`."""
+
     def _get_slot(slots, id_):
         if not slots:
             return ""
@@ -116,7 +117,7 @@ def _get_slot(slots, id_):
         slot = _get_slot(slots, id_=condition.data.slot)
         converted_cnd = {"chatsky.conditions.slots.SlotsExtracted": slot}
         nodes[edge.source][PRE_TRANSITION].update({slot: {"chatsky.processing.slots.Extract": slot}})
-    #TODO: elif condition["type"] == "chatsky":
+    # TODO: elif condition["type"] == "chatsky":
     else:
         raise ValueError(f"Unknown condition type: {condition['type']}")
 
@@ -189,7 +190,7 @@ async def update_responses_lines(nodes: dict) -> Tuple[dict, List[str]]:
             for message in response.data:
                 if "text" in message:
                     chatsky_responses.append({"chatsky.Message": {"text": message["text"]}})
-                else: #TODO: check: are you sure that you can use only "text" type inside a choice?
+                else:  # TODO: check: are you sure that you can use only "text" type inside a choice?
                     raise ValueError("Unknown response type. There must be a 'text' field in each message.")
             node["info"].data.response = {"chatsky.rsp.choice": chatsky_responses.copy()}
         else:
@@ -215,7 +216,7 @@ async def converter(build_id: int) -> None:
     replacer = ServiceReplacer(responses_list)
     replacer.visit(responses_tree)
 
-    with open(custom_responses_file, 'w') as file:
+    with open(custom_responses_file, "w") as file:
         file.write(ast.unparse(responses_tree))
 
     with open(custom_conditions_file, "r", encoding="UTF-8") as file:
@@ -245,10 +246,9 @@ async def converter(build_id: int) -> None:
     replacer = ServiceReplacer(conditions_list)
     replacer.visit(conditions_tree)
 
-    with open(custom_conditions_file, 'w') as file:
+    with open(custom_conditions_file, "w") as file:
         file.write(ast.unparse(conditions_tree))
 
-
     _fill_nodes_into_script(nodes, script)
 
     await write_conf(script, script_path)
diff --git a/backend/chatsky_ui/tests/e2e/test_e2e.py b/backend/chatsky_ui/tests/e2e/test_e2e.py
index f24567e8..535c28f9 100644
--- a/backend/chatsky_ui/tests/e2e/test_e2e.py
+++ b/backend/chatsky_ui/tests/e2e/test_e2e.py
@@ -50,5 +50,5 @@ async def test_all(mocker):
             await asyncio.sleep(10)
             assert await process_manager.get_status(run_id) == Status.ALIVE
 
-            async with aconnect_ws(f"http://localhost:8000/api/v1/bot/run/connect?run_id={run_id}", client) as ws:
+            async with aconnect_ws(f"http://localhost:8000/api/v1/bot/run/connect?run_id={run_id}", client):
                 pass
diff --git a/backend/chatsky_ui/tests/integration/test_api_integration.py b/backend/chatsky_ui/tests/integration/test_api_integration.py
index 0ec8e028..6ab9716a 100644
--- a/backend/chatsky_ui/tests/integration/test_api_integration.py
+++ b/backend/chatsky_ui/tests/integration/test_api_integration.py
@@ -205,7 +205,7 @@ async def test_connect_to_ws(mocker):
 
             assert await process_manager.get_status(run_id) == Status.ALIVE
 
-            async with aconnect_ws(f"http://localhost:8000/api/v1/bot/run/connect?run_id={run_id}", client) as ws:
+            async with aconnect_ws(f"http://localhost:8000/api/v1/bot/run/connect?run_id={run_id}", client):
                 pass