diff --git a/packages/jupyter-ai/jupyter_ai/extension.py b/packages/jupyter-ai/jupyter_ai/extension.py
index 6b7077ffe..68628efb3 100644
--- a/packages/jupyter-ai/jupyter_ai/extension.py
+++ b/packages/jupyter-ai/jupyter_ai/extension.py
@@ -143,7 +143,7 @@ def initialize_settings(self):
             "/help": help_chat_handler,
         }
 
-        slash_command_pattern = r'^[a-zA-Z0-9_]+$'
+        slash_command_pattern = r"^[a-zA-Z0-9_]+$"
         for chat_handler_ep in chat_handler_eps:
             try:
                 chat_handler = chat_handler_ep.load()
@@ -158,7 +158,7 @@ def initialize_settings(self):
             # Slash IDs may contain only alphanumerics and underscores.
             slash_id = chat_handler.slash_id
 
-            if chat_handler.routing_method == 'slash_command':
+            if chat_handler.routing_method == "slash_command":
                 if chat_handler.slash_id:
                     # Validate slash ID (/^[A-Za-z0-9_]+$/)
                     if re.match(slash_command_pattern, chat_handler.slash_id):