Fix Dremel 3D printer tests (#119853)

tests/components/dremel_3d_printer/conftest.py

@@ -32,7 +32,7 @@ def config_entry(hass: HomeAssistant) -> MockConfigEntry:
 @pytest.fixture
 def connection() -> None:
     """Mock Dremel 3D Printer connection."""
-    mock = requests_mock.Mocker()
+    with requests_mock.Mocker() as mock:
         mock.post(
             f"http://{HOST}:80/command",
             response_list=[
@@ -48,7 +48,7 @@ def connection() -> None:
             text=load_fixture("dremel_3d_printer/get_home_message.json"),
             status_code=HTTPStatus.OK,
         )
-    mock.start()
+        yield
 
 
 def patch_async_setup_entry():