diff --git a/tests/test_sequence.py b/tests/test_sequence.py
index 3a68c23..c565835 100644
--- a/tests/test_sequence.py
+++ b/tests/test_sequence.py
@@ -12,48 +12,51 @@ def get_id(a: Any):
 class TestHookedList:
     class TestConstruction:
         def test_empty(self):
-            lst = HookedList(existing=[])
+            lst = HookedList([])
             assert list(lst) == []
 
         def test_with_items(self):
-            lst = HookedList(existing=[1, 2, 3])
+            lst = HookedList([1, 2, 3])
             assert list(lst) == [1, 2, 3]
 
         def test_recreation(self):
             initial = [1, 2, 3]
             initial_id = id(initial)
 
-            lst = HookedList(existing=initial)
+            lst = HookedList(initial)
             assert id(lst._data) == initial_id
 
-            lst2 = HookedList(existing=lst)
+            lst2 = HookedList(lst)
             assert id(lst2._data) == initial_id
 
     class TestSeqOps:
         def test_len(self):
-            lst = HookedList(existing=[1, 2, 3])
+            lst = HookedList([1, 2, 3])
             assert len(lst) == 3
 
         def test_getitem(self):
-            lst = HookedList(existing=[1, 2, 3])
+            lst = HookedList([1, 2, 3])
             assert lst[0] == 1
             assert lst[1] == 2
             assert lst[-1] == 3
 
         def test_contains(self):
-            lst = HookedList(existing=[1, 2, 3])
+            lst = HookedList([1, 2, 3])
             assert 2 in lst
             assert 4 not in lst
 
         def test_iter(self):
-            lst = HookedList(existing=[1, 2, 3])
+            lst = HookedList([1, 2, 3])
             for i, item in enumerate(lst, start=1):
                 assert item == i
 
     class TestMutableOps:
         def test_setitem(self):
             added = []
-            lst = HookedList([1, 2, [4, 5, [6, 7]]], lambda e: added.append(e.item))
+            lst = HookedList(
+                [1, 2, [4, 5, [6, 7]]],
+                lambda e: added.append(e.item),
+            )
             lst[0] = 10
             lst.append(20)
             assert added == [10, 20]
@@ -62,11 +65,11 @@ class TestHookedList:
             assert added == [10, 20, 8]
 
         def test_delitem(self):
-            lst = HookedList(existing=[1, 2, 3])
+            lst = HookedList([1, 2, 3])
             del lst[1]
             assert list(lst) == [1, 3]
 
         def test_insert(self):
-            lst = HookedList(existing=[1, 3])
+            lst = HookedList([1, 3])
             lst.insert(1, 2)
             assert list(lst) == [1, 2, 3]