diff --git a/numcodecs/tests/test_entrypoints.py b/numcodecs/tests/test_entrypoints.py
index 4946c7ae..43503ec3 100644
--- a/numcodecs/tests/test_entrypoints.py
+++ b/numcodecs/tests/test_entrypoints.py
@@ -8,7 +8,7 @@
 here = os.path.abspath(os.path.dirname(__file__))
 
 
-@pytest.fixture()
+@pytest.fixture
 def set_path():
     sys.path.append(here)
     numcodecs.registry.run_entrypoints()
diff --git a/numcodecs/tests/test_pcodec.py b/numcodecs/tests/test_pcodec.py
index 6531074a..c10549bd 100644
--- a/numcodecs/tests/test_pcodec.py
+++ b/numcodecs/tests/test_pcodec.py
@@ -57,8 +57,8 @@ def test_config():
 
 
 def test_invalid_config_error():
+    codec = PCodec(mode_spec='bogus')
     with pytest.raises(ValueError):
-        codec = PCodec(mode_spec='bogus')
         check_encode_decode_array_to_bytes(arrays[0], codec)
 
 
diff --git a/numcodecs/tests/test_shuffle.py b/numcodecs/tests/test_shuffle.py
index 18afcb90..1194e598 100644
--- a/numcodecs/tests/test_shuffle.py
+++ b/numcodecs/tests/test_shuffle.py
@@ -162,7 +162,7 @@ def test_expected_result():
 
 
 def test_incompatible_elementsize():
+    arr = np.arange(1001, dtype='u1')
+    codec = Shuffle(elementsize=4)
     with pytest.raises(ValueError):
-        arr = np.arange(1001, dtype='u1')
-        codec = Shuffle(elementsize=4)
         codec.encode(arr)
diff --git a/pyproject.toml b/pyproject.toml
index 15bd8f4d..b85cb19f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -162,7 +162,6 @@ ignore = [
     "PT004",  # deprecated
     "PT005",  # deprecated
     "PT011",
-    "PT012",
 	"RUF001",
     "UP007",
     "UP027",  # deprecated