diff --git a/src/textual/geometry.py b/src/textual/geometry.py
index 1b7ceae78..1d98d7f9e 100644
--- a/src/textual/geometry.py
+++ b/src/textual/geometry.py
@@ -127,11 +127,6 @@ class Size(NamedTuple):
         return Region(0, 0, width, height)
 
     def __add__(self, other: object) -> Size:
-        if isinstance(other, Spacing):
-            width, height = self
-            other_width, other_height = other.totals
-            return Size(width + other_width, height + other_height)
-
         if isinstance(other, tuple):
             width, height = self
             width2, height2 = other
@@ -617,6 +612,7 @@ class Spacing(NamedTuple):
 
     @property
     def totals(self) -> tuple[int, int]:
+        """Total spacing for horizontal and vertical spacing."""
         top, right, bottom, left = self
         return (left + right, top + bottom)
 
diff --git a/tests/test_geometry.py b/tests/test_geometry.py
index 2581f77d5..46f1517c8 100644
--- a/tests/test_geometry.py
+++ b/tests/test_geometry.py
@@ -251,6 +251,10 @@ def test_region_y_range():
     assert Region(5, 10, 20, 30).y_range == range(10, 40)
 
 
+def test_region_reset_origin():
+    assert Region(5, 10, 20, 30).reset_origin == Region(0, 0, 20, 30)
+
+
 def test_region_expand():
     assert Region(50, 10, 10, 5).expand((2, 3)) == Region(48, 7, 14, 11)
 
@@ -280,6 +284,10 @@ def test_spacing_bottom_right():
     assert Spacing(2, 3, 4, 5).bottom_right == (3, 4)
 
 
+def test_spacing_totals():
+    assert Spacing(2, 3, 4, 5).totals == (8, 6)
+
+
 def test_spacing_css():
     assert Spacing(1, 1, 1, 1).css == "1"
     assert Spacing(1, 2, 1, 2).css == "1 2"