diff --git a/rich/syntax.py b/rich/syntax.py
index d8214c3c4..cff8fd235 100644
--- a/rich/syntax.py
+++ b/rich/syntax.py
@@ -221,7 +221,7 @@ class _SyntaxHighlightRange(NamedTuple):
     style: StyleType
     start: SyntaxPosition
     end: SyntaxPosition
-    before: bool = False
+    style_before: bool = False
 
 
 class Syntax(JupyterMixin):
@@ -793,7 +793,7 @@ def _apply_stylized_ranges(self, text: Text) -> None:
                 newlines_offsets, stylized_range.end
             )
             if start is not None and end is not None:
-                if stylized_range.before:
+                if stylized_range.style_before:
                     text.stylize_before(stylized_range.style, start, end)
                 else:
                     text.stylize(stylized_range.style, start, end)
diff --git a/rich/traceback.py b/rich/traceback.py
index 2d49b6f0a..39ae35566 100644
--- a/rich/traceback.py
+++ b/rich/traceback.py
@@ -767,7 +767,7 @@ def render_locals(frame: Frame) -> Iterable[ConsoleRenderable]:
 
 
 if __name__ == "__main__":  # pragma: no cover
-    install()
+    install(show_locals=True)
     import sys
 
     def bar(