matplotlib
diff --git a/‎lib/matplotlib/tests/test_axes.py
Copy file name to clipboardExpand all lines: lib/matplotlib/tests/test_axes.py
+12-1Lines changed: 12 additions & 1 deletion b/‎lib/matplotlib/tests/test_axes.py
Copy file name to clipboardExpand all lines: lib/matplotlib/tests/test_axes.py
+12-1Lines changed: 12 additions & 1 deletion
@@ -8056,25 +8056,32 @@ def test_artist_sublists():
     assert not ax.lines
     assert not ax.tables
 
+    # Adding items should warn.
     with pytest.warns(MatplotlibDeprecationWarning,
                       match='modification of the Axes.texts property'):
+        text._figure = text._axes = None
         ax.texts.append(text)
     with pytest.warns(MatplotlibDeprecationWarning,
                       match='modification of the Axes.collections property'):
+        col._figure = col._axes = None
         ax.collections.append(col)
     with pytest.warns(MatplotlibDeprecationWarning,
                       match='modification of the Axes.images property'):
+        im._figure = im._axes = None
         ax.images.append(im)
     with pytest.warns(MatplotlibDeprecationWarning,
                       match='modification of the Axes.patches property'):
+        patch._figure = patch._axes = None
         ax.patches.append(patch)
     # verify things are back
     assert list(ax.collections) == [col]
     assert list(ax.images) == [im]
     assert list(ax.patches) == [patch]
     assert list(ax.texts) == [text]
 
-    # Adding items should warn.
+    for ln in lines:
+        ln._figure = ln._axes = None
+
     with pytest.warns(MatplotlibDeprecationWarning,
                       match='modification of the Axes.lines property'):
         ax.lines.append(lines[-2])
@@ -8091,6 +8098,10 @@ def test_artist_sublists():
     # Modifying items should warn.
     with pytest.warns(MatplotlibDeprecationWarning,
                       match='modification of the Axes.lines property'):
+        ax.lines[0] = mpl.lines.Line2D([], [])
+    with pytest.warns(MatplotlibDeprecationWarning,
+                      match='modification of the Axes.lines property'):
+        lines[0]._axes = lines[0]._figure = None
         ax.lines[0] = lines[0]
     assert list(ax.lines) == [lines[0], lines[-2], lines[-1]]
     with pytest.warns(MatplotlibDeprecationWarning,