diff --git a/tests/conftest.py b/tests/conftest.py
index 11ee18c..f1c6242 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -7,6 +7,6 @@
 @pytest.fixture(scope='session', autouse=True)
 def api_keys():
     for envvar in SERVICE_APIKEY_ENVVAR_MAP.values():
-        os.environ[envvar] = os.getenv(envvar)
+        os.environ[envvar] = os.getenv(envvar) or ''  # type: ignore
     load_dotenv()
     yield
diff --git a/werewolf/const.py b/werewolf/const.py
index eb1ccea..71abb36 100644
--- a/werewolf/const.py
+++ b/werewolf/const.py
@@ -60,7 +60,6 @@ class EChatService(Enum):
     'gemini-1.5-flash': EChatService.Google,
     "gemini-pro-vision": EChatService.Google,
     'gemini-pro': EChatService.Google,
-    'mixtral-8x7b-32768': EChatService.Groq,
     'gemma2-9b-it': EChatService.Groq,
     'gemma2-7b-it': EChatService.Groq,
     'llama3-groq-70b-8192-tool-use-preview': EChatService.Groq,
diff --git a/werewolf/main.py b/werewolf/main.py
index 6e72ce9..5f1a677 100644
--- a/werewolf/main.py
+++ b/werewolf/main.py
@@ -69,7 +69,7 @@ def main(
             'model': model,
             'api_type': service.value,
             # FIXME: this is not good because the raw token is on memory
-            'api_key': os.getenv(SERVICE_APIKEY_ENVVAR_MAP[service]),
+            'api_key': os.getenv(SERVICE_APIKEY_ENVVAR_MAP[service]),  # type: ignore # noqa
         }]
 
     result = game(
diff --git a/werewolf/utils/openai.py b/werewolf/utils/openai.py
index e696b11..b2bf884 100644
--- a/werewolf/utils/openai.py
+++ b/werewolf/utils/openai.py
@@ -4,7 +4,7 @@
 from ..utils.utils import deprecate
 
 
-@deprecate(msg='Use werewolf.chat_models.create_chat_model instead.')
+@deprecate(msg='Use werewolf.chat_models.create_chat_model instead.')  # type: ignore # noqa
 @lru_cache(maxsize=None)
 def create_chat_openai_model(
     llm: ChatOpenAI | str | None = None,
diff --git a/werewolf/utils/utils.py b/werewolf/utils/utils.py
index a78bcf6..60e5ba8 100644
--- a/werewolf/utils/utils.py
+++ b/werewolf/utils/utils.py
@@ -58,7 +58,7 @@ def deprecate(
     logger: Logger = getLogger(__name__),
 ) -> (
     Callable[[InputType], OutputType]
-    | Callable[[Callable[[InputType], OutputType]], Callable[[InputType], OutputType]]
+    | Callable[[Callable[[InputType], OutputType]], Callable[[InputType], OutputType]]  # noqa
 ):
     """Decorator to deprecate a function.
 
@@ -72,7 +72,7 @@ def deprecate(
     """  # noqa
 
     if func is None:
-        return partial(deprecate, msg=msg, logger=logger)
+        return partial(deprecate, msg=msg, logger=logger)  # type: ignore
 
     def wrapper(*args, **kwargs):
         if hasattr(func, '__name__'):