tests (unit): Fix tests.

tests/unit/test_pubsub-cache.py

@@ -24,7 +24,6 @@ from libervia.backend.core.constants import Const as C
 
 
 class TestPubsubCache:
-
     @ed
     async def test_cache_is_used_transparently(self, host, client):
         """Cache is used when a pubsub get_items operation is done"""
@@ -61,12 +60,16 @@ class TestPubsubCache:
     @ed
     async def test_cache_is_not_used_when_no_cache(self, host, client):
         """Cache is skipped when 'pubsub_cache_strategy' is set to 'no_cache'"""
-        with host.use_option_and_reload(None, "pubsub_cache_strategy", "no_cache"):
+        with patch("libervia.backend.plugins.plugin_pubsub_cache.G") as mock_G:
+            mock_G.config.common.pubsub_cache_strategy = "no_cache"
+
             items_ret = defer.Deferred()
             items_ret.callback(([], {}))
             client.pubsub_client.items = MagicMock(return_value=items_ret)
             host.memory.storage.get_pubsub_node.return_value = None
-            host.memory.storage.set_pubsub_node.return_value = PubsubNode(sync_state=None)
+            host.memory.storage.set_pubsub_node.return_value = PubsubNode(
+                sync_state=None
+            )
             with patch.object(host.plugins["PUBSUB_CACHE"], "cache_node") as cache_node:
                 await host.plugins["XEP-0060"].get_items(
                     client,