@@ -1203,7 +1203,8 @@ def _update_props(self, props, errfmt):
                     func = getattr(self, f"set_{k}", None)
                     if not callable(func):
                         raise AttributeError(
-                            errfmt.format(cls=type(self), prop_name=k))
+                            errfmt.format(cls=type(self), prop_name=k),
+                            name=k)
                     ret.append(func(v))
         if ret:
             self.pchanged()
 
@@ -1501,8 +1501,9 @@ def test_calling_conventions(self):
             ax.voxels(x, y)
         # x, y, z are positional only - this passes them on as attributes of
         # Poly3DCollection
-        with pytest.raises(AttributeError):
+        with pytest.raises(AttributeError) as exec_info:
             ax.voxels(filled=filled, x=x, y=y, z=z)
+        assert exec_info.value.name == 'x'
 
 
 def test_line3d_set_get_data_3d():