Split reauth tests in plex (#89212)

tests/components/plex/conftest.py

@@ -1,5 +1,6 @@
 """Fixtures for Plex tests."""
-from unittest.mock import patch
+from collections.abc import Generator
+from unittest.mock import AsyncMock, patch
 
 import pytest
 
@@ -18,6 +19,15 @@ def plex_server_url(entry):
     return entry.data[PLEX_SERVER_CONFIG][CONF_URL].split(":", 1)[-1]
 
 
+@pytest.fixture
+def mock_setup_entry() -> Generator[AsyncMock, None, None]:
+    """Override async_setup_entry."""
+    with patch(
+        "homeassistant.components.plex.async_setup_entry", return_value=True
+    ) as mock_setup_entry:
+        yield mock_setup_entry
+
+
 @pytest.fixture(name="album", scope="session")
 def album_fixture():
     """Load album payload and return it."""