diff --git a/homeassistant/components/bluetooth/advertisement_tracker.py b/homeassistant/components/bluetooth/advertisement_tracker.py
index 3936435f84e..b6a70e32865 100644
--- a/homeassistant/components/bluetooth/advertisement_tracker.py
+++ b/homeassistant/components/bluetooth/advertisement_tracker.py
@@ -18,6 +18,8 @@ TRACKER_BUFFERING_WOBBLE_SECONDS = 5
 class AdvertisementTracker:
     """Tracker to determine the interval that a device is advertising."""
 
+    __slots__ = ("intervals", "sources", "_timings")
+
     def __init__(self) -> None:
         """Initialize the tracker."""
         self.intervals: dict[str, float] = {}
diff --git a/homeassistant/components/bluetooth/manager.py b/homeassistant/components/bluetooth/manager.py
index d1fcb115180..ce778e0309b 100644
--- a/homeassistant/components/bluetooth/manager.py
+++ b/homeassistant/components/bluetooth/manager.py
@@ -102,6 +102,28 @@ def _dispatch_bleak_callback(
 class BluetoothManager:
     """Manage Bluetooth."""
 
+    __slots__ = (
+        "hass",
+        "_integration_matcher",
+        "_cancel_unavailable_tracking",
+        "_cancel_logging_listener",
+        "_advertisement_tracker",
+        "_unavailable_callbacks",
+        "_connectable_unavailable_callbacks",
+        "_callback_index",
+        "_bleak_callbacks",
+        "_all_history",
+        "_connectable_history",
+        "_non_connectable_scanners",
+        "_connectable_scanners",
+        "_adapters",
+        "_sources",
+        "_bluetooth_adapters",
+        "storage",
+        "slot_manager",
+        "_debug",
+    )
+
     def __init__(
         self,
         hass: HomeAssistant,
diff --git a/tests/components/bluetooth/__init__.py b/tests/components/bluetooth/__init__.py
index 3aedd6f2deb..55d995dd63c 100644
--- a/tests/components/bluetooth/__init__.py
+++ b/tests/components/bluetooth/__init__.py
@@ -1,9 +1,11 @@
 """Tests for the Bluetooth integration."""
 
 
+from contextlib import contextmanager
+import itertools
 import time
 from typing import Any
-from unittest.mock import patch
+from unittest.mock import MagicMock
 
 from bleak import BleakClient
 from bleak.backends.scanner import AdvertisementData, BLEDevice
@@ -189,20 +191,46 @@ def inject_bluetooth_service_info(
     inject_advertisement(hass, device, advertisement_data)
 
 
+@contextmanager
 def patch_all_discovered_devices(mock_discovered: list[BLEDevice]) -> None:
     """Mock all the discovered devices from all the scanners."""
-    return patch.object(
-        _get_manager(),
-        "_async_all_discovered_addresses",
-        return_value={ble_device.address for ble_device in mock_discovered},
+    manager = _get_manager()
+    original_history = {}
+    scanners = list(
+        itertools.chain(
+            manager._connectable_scanners, manager._non_connectable_scanners
+        )
     )
+    for scanner in scanners:
+        data = scanner.discovered_devices_and_advertisement_data
+        original_history[scanner] = data.copy()
+        data.clear()
+    if scanners:
+        data = scanners[0].discovered_devices_and_advertisement_data
+        data.clear()
+        data.update(
+            {device.address: (device, MagicMock()) for device in mock_discovered}
+        )
+    yield
+    for scanner in scanners:
+        data = scanner.discovered_devices_and_advertisement_data
+        data.clear()
+        data.update(original_history[scanner])
 
 
+@contextmanager
 def patch_discovered_devices(mock_discovered: list[BLEDevice]) -> None:
     """Mock the combined best path to discovered devices from all the scanners."""
-    return patch.object(
-        _get_manager(), "async_discovered_devices", return_value=mock_discovered
-    )
+    manager = _get_manager()
+    original_all_history = manager._all_history
+    original_connectable_history = manager._connectable_history
+    manager._connectable_history = {}
+    manager._all_history = {
+        device.address: MagicMock(device=device) for device in mock_discovered
+    }
+    yield
+    manager._all_history = original_all_history
+    manager._connectable_history = original_connectable_history
 
 
 async def async_setup_with_default_adapter(hass: HomeAssistant) -> MockConfigEntry:
diff --git a/tests/components/bluetooth/test_usage.py b/tests/components/bluetooth/test_usage.py
index 0edab3ce77b..12bdba66d75 100644
--- a/tests/components/bluetooth/test_usage.py
+++ b/tests/components/bluetooth/test_usage.py
@@ -15,7 +15,7 @@ from homeassistant.components.bluetooth.wrappers import (
 )
 from homeassistant.core import HomeAssistant
 
-from . import _get_manager, generate_ble_device
+from . import generate_ble_device
 
 MOCK_BLE_DEVICE = generate_ble_device(
     "00:00:00:00:00:00",
@@ -65,12 +65,7 @@ async def test_bleak_client_reports_with_address(
     """Test we report when we pass an address to BleakClient."""
     install_multiple_bleak_catcher()
 
-    with patch.object(
-        _get_manager(),
-        "async_ble_device_from_address",
-        return_value=MOCK_BLE_DEVICE,
-    ):
-        instance = bleak.BleakClient("00:00:00:00:00:00")
+    instance = bleak.BleakClient("00:00:00:00:00:00")
 
     assert "BleakClient with an address instead of a BLEDevice" in caplog.text
 
@@ -92,14 +87,7 @@ async def test_bleak_retry_connector_client_reports_with_address(
     """Test we report when we pass an address to BleakClientWithServiceCache."""
     install_multiple_bleak_catcher()
 
-    with patch.object(
-        _get_manager(),
-        "async_ble_device_from_address",
-        return_value=MOCK_BLE_DEVICE,
-    ):
-        instance = bleak_retry_connector.BleakClientWithServiceCache(
-            "00:00:00:00:00:00"
-        )
+    instance = bleak_retry_connector.BleakClientWithServiceCache("00:00:00:00:00:00")
 
     assert "BleakClient with an address instead of a BLEDevice" in caplog.text