diff --git a/weldx/asdf/util.py b/weldx/asdf/util.py
index 52e420a69..c7de94c57 100644
--- a/weldx/asdf/util.py
+++ b/weldx/asdf/util.py
@@ -770,7 +770,7 @@ def convert_wx_shape(path, key, value):
         if isinstance(value, dict) and ("wx_shape" in value):
             if isinstance(value["wx_shape"], list):
                 value = value.copy()
-                value["wx_shape"] = f"[{','.join((str(n) for n in value['wx_shape']))}]"
+                value["wx_shape"] = f"[{','.join(str(n) for n in value['wx_shape'])}]"
         return key, value
 
     def mark_required(path, key, value):
diff --git a/weldx/welding/groove/iso_9692_1.py b/weldx/welding/groove/iso_9692_1.py
index 89e1962e4..1e734d774 100644
--- a/weldx/welding/groove/iso_9692_1.py
+++ b/weldx/welding/groove/iso_9692_1.py
@@ -216,7 +216,7 @@ def _compute_cross_sect_area_interpolated(self):
         profile = self.to_profile()
         rasterization = profile.rasterize(self._AREA_RASTER_WIDTH, stack=False)
         # skipcq: PYL-R1721
-        points = [[(x, y) for x, y in shape.m.T] for shape in rasterization]
+        points = [list(shape.m.T) for shape in rasterization]
 
         return _compute_cross_sect_shape_points(points)