fix: sideeffects created by changing fork to spawn (#2591)

tests/test_app.py

@@ -15,7 +15,7 @@ from sanic import Sanic
 from sanic.compat import OS_IS_WINDOWS
 from sanic.config import Config
 from sanic.exceptions import SanicException
-from sanic.helpers import _default
+from sanic.helpers import Default
 from sanic.log import LOGGING_CONFIG_DEFAULTS
 from sanic.response import text
 from sanic.router import Route
@@ -497,7 +497,9 @@ def test_uvloop_cannot_never_called_with_create_server(caplog, monkeypatch):
     )
 
     counter = Counter([(r[1], r[2]) for r in caplog.record_tuples])
-    modified = sum(1 for app in apps if app.config.USE_UVLOOP is not _default)
+    modified = sum(
+        1 for app in apps if not isinstance(app.config.USE_UVLOOP, Default)
+    )
 
     assert counter[(logging.WARNING, message)] == modified