diff --git a/src/textual/command.py b/src/textual/command.py
index d6634e46ba..5833477234 100644
--- a/src/textual/command.py
+++ b/src/textual/command.py
@@ -331,7 +331,9 @@ class SimpleCommand(NamedTuple):
     """The description of the command."""
 
 
-CommandListItem: TypeAlias = "SimpleCommand | tuple[str, IgnoreReturnCallbackType, str | None] | tuple[str, IgnoreReturnCallbackType]"
+CommandListItem: TypeAlias = (
+    "SimpleCommand | tuple[str, IgnoreReturnCallbackType, str | None] | tuple[str, IgnoreReturnCallbackType]"
+)
 
 
 class SimpleProvider(Provider):