diff --git a/check_source/check_deprecated.py b/check_source/check_deprecated.py
index 8b8b8d606d5bc3e47b22f03c9377c2e6e61e975a..7886754b2afda38f0dc45b6620c63e6593194689 100644
--- a/check_source/check_deprecated.py
+++ b/check_source/check_deprecated.py
@@ -22,7 +22,8 @@ from os.path import splitext
 
 SKIP_DIRS = (
     "extern",
-    "tests",  # not this dir
+    # Not this directory.
+    "tests",
 )
 
 
diff --git a/utils/blender_theme_as_c.py b/utils/blender_theme_as_c.py
index acdb6ac77d1465f52a76e7b50e657bb408f32472..cb95b9604f84d2715fe26c3aa6b2e9247f751b7d 100755
--- a/utils/blender_theme_as_c.py
+++ b/utils/blender_theme_as_c.py
@@ -69,13 +69,13 @@ del sys
 source_dst = os.path.join(
     os.path.dirname(__file__),
     "..", "..", "..",
-    "release", "datafiles", "userdef", "userdef_default_theme.c"
+    "release", "datafiles", "userdef", "userdef_default_theme.c",
 )
 
 dna_rename_defs_h = os.path.join(
     os.path.dirname(__file__),
     "..", "..", "..",
-    "source", "blender", "makesdna", "intern", "dna_rename_defs.h"
+    "source", "blender", "makesdna", "intern", "dna_rename_defs.h",
 )
 
 
@@ -227,7 +227,7 @@ def file_remove_empty_braces(source_dst):
         data_prev = data
         data = re.sub(
             r'\s+\.[a-zA-Z_0-9]+\s+=\s+\{\s*\},',
-            key_replace, data, re.MULTILINE
+            key_replace, data, re.MULTILINE,
         )
 
     # Use two spaces instead of tabs.
diff --git a/utils_api/bpy_introspect_ui.py b/utils_api/bpy_introspect_ui.py
index ba83704e98e01a50fee3cdd2064c2bfaaaeb8738..5c2fa62c3ccef951c66c09ed7a51b9b8ea84ed4a 100644
--- a/utils_api/bpy_introspect_ui.py
+++ b/utils_api/bpy_introspect_ui.py
@@ -222,7 +222,7 @@ class Menu(BaseFakeUI):
             self, searchpaths, operator, *,
             props_default=None, prop_filepath="filepath",
             filter_ext=None, filter_path=None, display_name=None,
-            add_operator=None
+            add_operator=None,
     ):
         pass
 
diff --git a/utils_maintenance/autopep8_format_paths.py b/utils_maintenance/autopep8_format_paths.py
index 149b9cadd62fbd8f45d5425117ce01ca1145ee36..69a4fd8af4f4cf6e541c54ed4ac6357094d05dcb 100755
--- a/utils_maintenance/autopep8_format_paths.py
+++ b/utils_maintenance/autopep8_format_paths.py
@@ -156,7 +156,7 @@ def argparse_create() -> argparse.ArgumentParser:
     parser.add_argument(
         "paths",
         nargs=argparse.REMAINDER,
-        help="All trailing arguments are treated as paths."
+        help="All trailing arguments are treated as paths.",
     )
 
     return parser
diff --git a/utils_maintenance/clang_format_paths.py b/utils_maintenance/clang_format_paths.py
index 06b6a8392b31eccad093e3e276c1382ec92841f7..07e6428912374ffb1dcf425b4369273b7e5d76dd 100755
--- a/utils_maintenance/clang_format_paths.py
+++ b/utils_maintenance/clang_format_paths.py
@@ -203,7 +203,7 @@ def argparse_create():
     parser.add_argument(
         "paths",
         nargs=argparse.REMAINDER,
-        help="All trailing arguments are treated as paths."
+        help="All trailing arguments are treated as paths.",
     )
 
     return parser