diff --git a/pyproject.toml b/pyproject.toml
index 51c6a78..f890ab6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ Homepage = "https://github.com/sarugaku/resolvelib"
 
 [project.optional-dependencies]
 lint = [
-    "black==23.12.1",
+    "black~=24.0",
     "ruff",
     "isort",
     "mypy",
diff --git a/tests/functional/cocoapods/test_resolvers_cocoapods.py b/tests/functional/cocoapods/test_resolvers_cocoapods.py
index a7eee16..10ca562 100644
--- a/tests/functional/cocoapods/test_resolvers_cocoapods.py
+++ b/tests/functional/cocoapods/test_resolvers_cocoapods.py
@@ -233,12 +233,14 @@ def get_dependencies(self, candidate):
 
 @pytest.fixture(
     params=[
-        pytest.param(
-            os.path.join(CASE_DIR, n),
-            marks=pytest.mark.xfail(strict=True, reason=XFAIL_CASES[n]),
+        (
+            pytest.param(
+                os.path.join(CASE_DIR, n),
+                marks=pytest.mark.xfail(strict=True, reason=XFAIL_CASES[n]),
+            )
+            if n in XFAIL_CASES
+            else os.path.join(CASE_DIR, n)
         )
-        if n in XFAIL_CASES
-        else os.path.join(CASE_DIR, n)
         for n in CASE_NAMES
     ],
     ids=[n[:-5] for n in CASE_NAMES],
diff --git a/tests/functional/python/py2index.py b/tests/functional/python/py2index.py
index fc6a0bc..710831f 100644
--- a/tests/functional/python/py2index.py
+++ b/tests/functional/python/py2index.py
@@ -29,15 +29,7 @@
 import re
 import sys
 import urllib.parse
-from typing import (
-    Dict,
-    Iterable,
-    Iterator,
-    List,
-    NamedTuple,
-    Tuple,
-    Union,
-)
+from typing import Dict, Iterable, Iterator, List, NamedTuple, Tuple, Union
 
 import html5lib
 import packaging.requirements
diff --git a/tests/functional/python/test_resolvers_python.py b/tests/functional/python/test_resolvers_python.py
index 0847354..9e4cff1 100644
--- a/tests/functional/python/test_resolvers_python.py
+++ b/tests/functional/python/test_resolvers_python.py
@@ -138,12 +138,14 @@ def get_dependencies(self, candidate):
 
 @pytest.fixture(
     params=[
-        pytest.param(
-            os.path.join(CASE_DIR, n),
-            marks=pytest.mark.xfail(strict=True, reason=XFAIL_CASES[n]),
+        (
+            pytest.param(
+                os.path.join(CASE_DIR, n),
+                marks=pytest.mark.xfail(strict=True, reason=XFAIL_CASES[n]),
+            )
+            if n in XFAIL_CASES
+            else os.path.join(CASE_DIR, n)
         )
-        if n in XFAIL_CASES
-        else os.path.join(CASE_DIR, n)
         for n in CASE_NAMES
     ],
     ids=[n[:-5] for n in CASE_NAMES],