diff --git a/src/dxtbx/format/FormatXTC.py b/src/dxtbx/format/FormatXTC.py
index cb70f7448..b73a4da17 100644
--- a/src/dxtbx/format/FormatXTC.py
+++ b/src/dxtbx/format/FormatXTC.py
@@ -6,9 +6,9 @@
 from itertools import groupby
 
 import numpy as np
+
 import serialtbx.detector.xtc
 import serialtbx.util
-
 from libtbx.phil import parse
 from scitbx.array_family import flex
 
@@ -174,7 +174,7 @@ def _load_hit_indices(self):
             assert self.params.mode == "idx"
             hits = np.loadtxt(self.params.hits_file, int)
             hits = list(map(tuple, hits))
-            key = lambda x: x[0]
+            key = lambda x: x[0]  # noqa: E731
             gb = groupby(sorted(hits, key=key), key=key)
             # dictionary where key is run number, and vals are indices of hits
             self._hit_inds = {r: [ind for _, ind in group] for r, group in gb}
diff --git a/src/dxtbx/format/nexus.py b/src/dxtbx/format/nexus.py
index f1c4c99b3..35dfefaab 100644
--- a/src/dxtbx/format/nexus.py
+++ b/src/dxtbx/format/nexus.py
@@ -7,7 +7,7 @@
 from typing import Iterable, Union
 
 import h5py
-import hdf5plugin  # noqa; F401
+import hdf5plugin  # noqa: F401
 import numpy
 
 import cctbx.uctbx
diff --git a/src/dxtbx/imageset.py b/src/dxtbx/imageset.py
index 9c2291120..20351bcae 100644
--- a/src/dxtbx/imageset.py
+++ b/src/dxtbx/imageset.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+from typing import Iterable
+
 import natsort
 
 import boost_adaptbx.boost.python
@@ -31,8 +33,6 @@
 
 ext = boost_adaptbx.boost.python.import_ext("dxtbx_ext")
 
-from typing import Iterable
-
 __all__ = (
     "ExternalLookup",
     "ExternalLookupItemBool",
diff --git a/src/dxtbx/util/dlsnxs2cbf.py b/src/dxtbx/util/dlsnxs2cbf.py
index 011afe42d..2d45fcf85 100644
--- a/src/dxtbx/util/dlsnxs2cbf.py
+++ b/src/dxtbx/util/dlsnxs2cbf.py
@@ -5,7 +5,7 @@
 from pathlib import Path
 
 import h5py
-import hdf5plugin  # noqa; F401
+import hdf5plugin  # noqa: F401
 import numpy as np
 import nxmx
 import pint
diff --git a/tests/nexus/test_nxmx_writer.py b/tests/nexus/test_nxmx_writer.py
index aa5538f86..a86d28e8a 100644
--- a/tests/nexus/test_nxmx_writer.py
+++ b/tests/nexus/test_nxmx_writer.py
@@ -9,12 +9,11 @@
 from libtbx.test_utils import approx_equal
 
 from dxtbx.format.nexus import h5str
+from dxtbx.format.nxmx_writer import NXmxWriter, phil_scope
 from dxtbx.model.experiment_list import ExperimentListFactory
 
 pytest.importorskip("dials")
 
-from dxtbx.format.nxmx_writer import NXmxWriter, phil_scope
-
 
 def test_writer_jf16M(dials_data, tmpdir):
     h5path = (