Fix PytestRemovedIn8Warning

tests/test_note.py

@@ -262,12 +262,12 @@ def test_suppress_warnings(recwarn):
  model=my_model,
  fields=['Capital of <$> Argentina', 'Buenos Aires'])
 
- with pytest.warns(None) as warn_recorder:
+ # https://stackoverflow.com/a/45671804
+ with warnings.catch_warnings():
+ warnings.simplefilter('error')
  warnings.filterwarnings('ignore', message='^Field contained the following invalid HTML tags', module='genanki')
  my_note.write_to_db(mock.MagicMock(), mock.MagicMock(), mock.MagicMock(), itertools.count(int(time.time() * 1000)))
 
- assert not warn_recorder
-
 
 def test_furigana_field():
  # Fields like {{furigana:Reading}} are supported by the Japanese Support plugin: