diff --git a/src/art/cli.py b/src/art/cli.py
index 62218dbd..1afbba65 100644
--- a/src/art/cli.py
+++ b/src/art/cli.py
@@ -245,9 +245,9 @@ def migrate(
                     model_dir,
                     delete_originals=not keep_jsonl,
                     dry_run=dry_run,
-                    progress_callback=lambda f: typer.echo(f"    {f}")
-                    if verbose
-                    else None,
+                    progress_callback=lambda f: (
+                        typer.echo(f"    {f}") if verbose else None
+                    ),
                 )
                 result = result + model_result
     else:
diff --git a/src/art/tinker/server.py b/src/art/tinker/server.py
index 22ee9bb9..8a553409 100644
--- a/src/art/tinker/server.py
+++ b/src/art/tinker/server.py
@@ -4,7 +4,7 @@
 import os
 import socket
 import time
-from typing import Annotated
+from typing import Annotated, cast
 import uuid
 
 from fastapi import FastAPI, HTTPException, Request
@@ -62,10 +62,13 @@ async def prompt_tokens(
             messages: list[ChatCompletionMessageParam],
             tools: list[ChatCompletionToolUnionParam] | None,
         ) -> list[int]:
-            return self._get_renderer(base_model).tokenizer.apply_chat_template(
-                messages,  # type: ignore
-                tools=tools,  # type: ignore
-                add_generation_prompt=True,
+            return cast(
+                list[int],
+                self._get_renderer(base_model).tokenizer.apply_chat_template(
+                    messages,  # type: ignore
+                    tools=tools,  # type: ignore
+                    add_generation_prompt=True,
+                ),
             )
 
         async def chat_completion_and_token_discrepancies(
@@ -80,9 +83,9 @@ async def chat_completion_and_token_discrepancies(
             token_discrepancies: list[tuple[list[int], list[int]]] = []
             for i, sequence in enumerate(sample_response.sequences):
                 assert sequence.logprobs is not None, "Logprobs are required"
-                assert len(sequence.tokens) == len(
-                    sequence.logprobs
-                ), "Tokens and logprobs must have the same length"
+                assert len(sequence.tokens) == len(sequence.logprobs), (
+                    "Tokens and logprobs must have the same length"
+                )
                 rendered_response_tokens = renderer.tokenizer.encode(
                     renderer.tokenizer.decode(sequence.tokens)
                 )
@@ -222,10 +225,11 @@ async def chat_completions(
                     detail="Missing or invalid Authorization header",
                     headers={"WWW-Authenticate": "Bearer"},
                 )
-            sampling_client, base_model = (
-                await self._get_sampling_client_and_base_model(
-                    api_key, self.models.get(body["model"], body["model"])
-                )
+            (
+                sampling_client,
+                base_model,
+            ) = await self._get_sampling_client_and_base_model(
+                api_key, self.models.get(body["model"], body["model"])
             )
             rendered_prompt_tokens = await worker.prompt_tokens(
                 base_model=base_model,
@@ -265,13 +269,14 @@ async def chat_completions(
                 else:
                     detail = str(e)
                 raise HTTPException(status_code=e.status_code, detail=detail) from e
-            chat_completion, token_discrepancies = (
-                await worker.chat_completion_and_token_discrepancies(
-                    base_model=base_model,
-                    sample_response=sample_response,
-                    model_name=body["model"],
-                    prompt_tokens=len(prompt_tokens),
-                )
+            (
+                chat_completion,
+                token_discrepancies,
+            ) = await worker.chat_completion_and_token_discrepancies(
+                base_model=base_model,
+                sample_response=sample_response,
+                model_name=body["model"],
+                prompt_tokens=len(prompt_tokens),
             )
             for rendered_response_tokens, raw_response_tokens in token_discrepancies:
                 self._prefix_cache.insert(