diff --git a/aider/models.py b/aider/models.py
index 30ae58c5e..849a9c1aa 100644
--- a/aider/models.py
+++ b/aider/models.py
@@ -675,10 +675,16 @@ def sanity_check_model(io, model):
         io.tool_error(f"Model {model}: Missing these environment variables:")
         for key in model.missing_keys:
             io.tool_error(f"- {key}")
-        
+
         if platform.system() == "Windows":
-            io.tool_output("\nNote for Windows users: If you've just set these environment variables using 'setx',")
-            io.tool_output("you may need to restart your terminal or command prompt for the changes to take effect.")
+            io.tool_output(
+                "\nNote for Windows users: If you've just set these environment variables using"
+                " 'setx',"
+            )
+            io.tool_output(
+                "you may need to restart your terminal or command prompt for the changes to take"
+                " effect."
+            )
     elif not model.keys_in_environment:
         show = True
         io.tool_output(f"Model {model}: Unknown which environment variables are required.")