That's a good trick. In Django world I like pytest-django's django_assert_max_num_queries fixture: https://pytest-django.readthedocs.io/en/latest/helpers.html#...

  def test_homepage_queries(django_assert_max_num_queries, client):
      with django_assert_max_num_queries(10):
          assert client.get("/").status_code == 200

Or django_assert_num_queries to assert an exact number.