Merge pull request matplotlib#19108 from anntzer/animtests

Fix failing animation test with pytest 6.2.

Author: timhoffm

lib/matplotlib/tests/test_animation.py

@@ -197,6 +197,8 @@ def test_animation_repr_html(writer, html, want, anim):
         html = anim._repr_html_()
     if want is None:
         assert html is None
+        with pytest.warns(UserWarning):
+            del anim  # Animtion was never run, so will warn on cleanup.
     else:
         assert want in html
 

lib/matplotlib/tests/test_image.py

@@ -707,7 +707,8 @@ def test_load_from_url():
            + ('///' if sys.platform == 'win32' else '')
            + path.resolve().as_posix())
     plt.imread(url)
-    plt.imread(urllib.request.urlopen(url))
+    with urllib.request.urlopen(url) as file:
+        plt.imread(file)
 
 
 @image_comparison(['log_scale_image'], remove_text=True)