Enable PyTest ruff checks

hardware-specific-tests/picamera2/test_acquisition.py

@@ -3,14 +3,14 @@
 from fastapi.testclient import TestClient
 from PIL import Image
 import numpy as np
-from pytest import fixture
+import pytest
 
 import labthings_fastapi as lt
 
 from openflexure_microscope_server.things.camera.picamera import StreamingPiCamera2
 
 
-@fixture(scope="module")
+@pytest.fixture(scope="module")
 def client() -> lt.ThingClient:
     """Initialise a test client for the StreamingPiCamera2 Thing.
 

hardware-specific-tests/picamera2/test_calibration.py

@@ -14,7 +14,7 @@ from openflexure_microscope_server.things.camera.picamera import (
 )
 
 
-@pytest.fixture()
+@pytest.fixture
 def picamera_thing() -> StreamingPiCamera2:
     """Return a StreamingPiCamera2 Thing.
 
@@ -24,7 +24,7 @@ def picamera_thing() -> StreamingPiCamera2:
     return StreamingPiCamera2()
 
 
-@pytest.fixture()
+@pytest.fixture
 def client(picamera_thing) -> lt.ThingClient:
     """Initialise a test client for the StreamingPiCamera2 Thing.
 

hardware-specific-tests/picamera2/test_tuning.py

@@ -68,9 +68,6 @@ def _test_bad_tuning_after_good_tuning(configure: bool = False):
     with pytest.raises(IndexError):
         # The bad version should cause a problem
         cam = Picamera2(tuning=bad_tuning)
-        print_tuning()
-        print("Success (not expected)!")
-        del cam
     recalibrate_utils.recreate_camera_manager()
     with Picamera2(tuning=default_tuning) as cam:
         # Reload the camera with working tuning, or it will stop responding