diff --git a/.github/workflows/unittests.yml b/.github/workflows/unittests.yml
index 138070c..bf61a1d 100644
--- a/.github/workflows/unittests.yml
+++ b/.github/workflows/unittests.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         python-version: [
-          '3.8', '3.9', '3.10', '3.11', '3.12', '3.13',
+          '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14',
           'pypy-3.8', 'pypy-3.10'
         ]
 
diff --git a/asyncstdlib/asynctools.py b/asyncstdlib/asynctools.py
index 556832a..dd23948 100644
--- a/asyncstdlib/asynctools.py
+++ b/asyncstdlib/asynctools.py
@@ -20,7 +20,6 @@
 from ._core import aiter
 from .contextlib import nullcontext
 
-
 S = TypeVar("S")
 
 
diff --git a/asyncstdlib/builtins.py b/asyncstdlib/builtins.py
index 1387f35..717dbae 100644
--- a/asyncstdlib/builtins.py
+++ b/asyncstdlib/builtins.py
@@ -22,7 +22,6 @@
     Sentinel,
 )
 
-
 __ANEXT_DEFAULT = Sentinel("<no default>")
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 703b31c..8f4b52a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
 ]
 license = {"file" = "LICENSE"}
 keywords = ["async", "enumerate", "itertools", "builtins", "functools", "contextlib"]
@@ -80,3 +81,6 @@ verboseOutput = true
 testpaths = [
     "unittests",
 ]
+
+[tool.black]
+target-version = ["py38", "py39","py310", "py311", "py312", "py313", "py314"]
diff --git a/unittests/test_asynctools.py b/unittests/test_asynctools.py
index 119f537..b519711 100644
--- a/unittests/test_asynctools.py
+++ b/unittests/test_asynctools.py
@@ -4,7 +4,6 @@
 
 from .utility import sync, asyncify
 
-
 CLOSED = "closed"
 
 
diff --git a/unittests/test_functools_lru.py b/unittests/test_functools_lru.py
index 1a509bc..f85c994 100644
--- a/unittests/test_functools_lru.py
+++ b/unittests/test_functools_lru.py
@@ -2,6 +2,7 @@
 import sys
 
 import pytest
+from typing_extensions import get_annotations, Format
 
 import asyncstdlib as a
 
@@ -175,5 +176,7 @@ async def other_method(self):
             if name != "method":
                 continue
             # test direct and literal annotation styles
-            assert Bar.method.__annotations__["int_arg"] in {int, "int"}
-            assert Bar().method.__annotations__["int_arg"] in {int, "int"}
+            assert get_annotations(Bar.method, format=Format.STRING)["int_arg"] == "int"
+            assert (
+                get_annotations(Bar().method, format=Format.STRING)["int_arg"] == "int"
+            )
diff --git a/unittests/test_heapq.py b/unittests/test_heapq.py
index 201b684..425e412 100644
--- a/unittests/test_heapq.py
+++ b/unittests/test_heapq.py
@@ -7,7 +7,6 @@
 
 from .utility import sync, asyncify, awaitify
 
-
 MERGE_SAMPLES = [
     [[1, 2], [3, 4]],
     [[1, 2, 3], [4, 5, 6], [7, 8, 9]],
diff --git a/unittests/utility.py b/unittests/utility.py
index 479278d..ca2ff9e 100644
--- a/unittests/utility.py
+++ b/unittests/utility.py
@@ -13,7 +13,6 @@
 from collections import deque
 from random import randint
 
-
 T = TypeVar("T")