diff --git a/data_structures/queue/double_ended_queue.py b/data_structures/queue/double_ended_queue.py
index 637b7f62fd2c..2472371b42fe 100644
--- a/data_structures/queue/double_ended_queue.py
+++ b/data_structures/queue/double_ended_queue.py
@@ -32,7 +32,7 @@ class Deque:
         the number of nodes
     """
 
-    __slots__ = ["_front", "_back", "_len"]
+    __slots__ = ("_front", "_back", "_len")
 
     @dataclass
     class _Node:
@@ -54,7 +54,7 @@ class _Iterator:
             the current node of the iteration.
         """
 
-        __slots__ = ["_cur"]
+        __slots__ = "_cur"
 
         def __init__(self, cur: Deque._Node | None) -> None:
             self._cur = cur
diff --git a/maths/least_common_multiple.py b/maths/least_common_multiple.py
index 621d93720c41..10cc63ac7990 100644
--- a/maths/least_common_multiple.py
+++ b/maths/least_common_multiple.py
@@ -67,7 +67,7 @@ def benchmark():
 
 
 class TestLeastCommonMultiple(unittest.TestCase):
-    test_inputs = [
+    test_inputs = (
         (10, 20),
         (13, 15),
         (4, 31),
@@ -77,8 +77,8 @@ class TestLeastCommonMultiple(unittest.TestCase):
         (12, 25),
         (10, 25),
         (6, 9),
-    ]
-    expected_results = [20, 195, 124, 210, 1462, 60, 300, 50, 18]
+    )
+    expected_results = (20, 195, 124, 210, 1462, 60, 300, 50, 18)
 
     def test_lcm_function(self):
         for i, (first_num, second_num) in enumerate(self.test_inputs):
diff --git a/project_euler/problem_054/sol1.py b/project_euler/problem_054/sol1.py
index 74409f32c712..9f438100095e 100644
--- a/project_euler/problem_054/sol1.py
+++ b/project_euler/problem_054/sol1.py
@@ -70,7 +70,7 @@ class PokerHand:
         list.sort(), sorted()
     """
 
-    _HAND_NAME = [
+    _HAND_NAME = (
         "High card",
         "One pair",
         "Two pairs",
@@ -81,9 +81,9 @@ class PokerHand:
         "Four of a kind",
         "Straight flush",
         "Royal flush",
-    ]
+    )
 
-    _CARD_NAME = [
+    _CARD_NAME = (
         "",  # placeholder as lists are zero indexed
         "One",
         "Two",
@@ -99,7 +99,7 @@ class PokerHand:
         "Queen",
         "King",
         "Ace",
-    ]
+    )
 
     def __init__(self, hand: str) -> None:
         """
diff --git a/pyproject.toml b/pyproject.toml
index 1dcce044a313..07fe9fe418f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,6 +103,7 @@ max-complexity = 17  # default: 10
 "machine_learning/linear_discriminant_analysis.py" = ["ARG005"]
 "machine_learning/sequential_minimum_optimization.py" = ["SIM115"]
 "matrix/sherman_morrison.py" = ["SIM103", "SIM114"]
+"other/lfu_cache.py" = ["RUF012"]
 "physics/newtons_second_law_of_motion.py" = ["BLE001"]
 "project_euler/problem_099/sol1.py" = ["SIM115"]
 "sorts/external_sort.py" = ["SIM115"]