matplotlib
diff --git a/‎lib/mpl_toolkits/mplot3d/axis3d.py‎
Lines changed: 4 additions & 6 deletions b/‎lib/mpl_toolkits/mplot3d/axis3d.py‎
Lines changed: 4 additions & 6 deletions
diff --git a/‎lib/mpl_toolkits/mplot3d/tests/baseline_images/test_axes3d/axes3d_primary_views.png‎
314 Bytes b/‎lib/mpl_toolkits/mplot3d/tests/baseline_images/test_axes3d/axes3d_primary_views.png‎
314 Bytes
@@ -727,13 +727,11 @@ def get_tightbbox(self, renderer=None, *, for_layout_only=False):
             if for_layout_only:
                 angle = self.label.get_rotation()
                 if abs(angle % 180) < 45:  # label is roughly horizontal
-                    if bb.height > 0:
-                        bb.y0 = (bb.y0 + bb.y1) / 2 - 0.5
-                        bb.y1 = bb.y0 + 1.0
+                    bb = mtransforms.Bbox([[bb.x0, (bb.y0 + bb.y1) / 2 - 0.5],
+                                           [bb.x1, (bb.y0 + bb.y1) / 2 + 0.5]])
                 else:  # label is roughly vertical
-                    if bb.width > 0:
-                        bb.x0 = (bb.x0 + bb.x1) / 2 - 0.5
-                        bb.x1 = bb.x0 + 1.0
+                    bb = mtransforms.Bbox([[(bb.x0 + bb.x1) / 2 - 0.5, bb.y0],
+                                           [(bb.x0 + bb.x1) / 2 + 0.5, bb.y1]])
             other.append(bb)
 
         return mtransforms.Bbox.union([*bb_1, *bb_2, *other])