diff --git a/cf_units/__init__.py b/cf_units/__init__.py
index 7032efb7..454bd51c 100644
--- a/cf_units/__init__.py
+++ b/cf_units/__init__.py
@@ -1385,8 +1385,10 @@ def __repr__(self):
         if self.calendar is None:
             result = f"{self.__class__.__name__}('{self}')"
         else:
-            result = (f"{self.__class__.__name__}"
-                      f"('{self}', calendar='{self.calendar}')")
+            result = (
+                f"{self.__class__.__name__}"
+                f"('{self}', calendar='{self.calendar}')"
+            )
         return result
 
     def _offset_common(self, offset):
diff --git a/cf_units/tests/test_coding_standards.py b/cf_units/tests/test_coding_standards.py
index e6bed081..b0cd6320 100644
--- a/cf_units/tests/test_coding_standards.py
+++ b/cf_units/tests/test_coding_standards.py
@@ -202,7 +202,7 @@ def test_python_versions():
         assert tox_text.count(f"{py_version}-lock") == 3
 
     ci_wheels_text = ci_wheels_file.read_text()
-    (cibw_line,) = [
+    (cibw_line,) = (
         line for line in ci_wheels_text.splitlines() if "CIBW_SKIP" in line
-    ]  # NOQA C419
+    )  # NOQA C419
     assert all([p not in cibw_line for p in supported_strip])