test fix

sandbox/will/just_a_box.py

@@ -18,7 +18,7 @@ class Box(Widget, can_focus=True):
 
 class JustABox(App):
     def compose(self) -> ComposeResult:
-
+        # yield Container(Box(classes="box"))
         yield Horizontal(
             Vertical(
                 Box(id="box1", classes="box"),

src/textual/css/stylesheet.py

@@ -128,7 +128,7 @@ class CssSource(NamedTuple):
 
     content: str
     is_defaults: bool
-    tie_breaker: int
+    tie_breaker: int = 0
 
 
 @rich.repr.auto(angular=True)