diff --git a/.github/workflows/packaging.yml b/.github/workflows/packaging.yml
index af1c71c..bb7e4e3 100644
--- a/.github/workflows/packaging.yml
+++ b/.github/workflows/packaging.yml
@@ -15,12 +15,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9]
+        python-version: [3.11]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -30,7 +30,7 @@ jobs:
       run: python -m build
     - name: Run twine check
       run: twine check dist/*
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: tox-gh-actions-dist
         path: dist
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1410873..738d2df 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,17 +13,23 @@ jobs:
       matrix:
         # https://help.github.com/articles/virtual-environments-for-github-actions
         platform:
-          - ubuntu-18.04
           - ubuntu-latest  # ubuntu-20.04
-          - macos-latest  # macOS-10.15
-          - windows-2016
-          - windows-latest  # windows-2019
-        python-version: [3.7, 3.8, 3.9, '3.10', pypy-3.7]
+          - macos-latest  # macOS-11
+          - windows-latest  # windows-2022
+        python-version: [3.7, 3.8, 3.9, '3.10', '3.11', 3.12-dev, pypy-3.7, pypy-3.8, pypy-3.9]
 
     steps:
+    - uses: actions/checkout@v3
+      if: ${{ ! startsWith(matrix.python-version, 'pypy-') }}
     - uses: actions/checkout@v1
+      if: ${{ startsWith(matrix.python-version, 'pypy-') }}
+      # Using actions/checkout@v2 or later with pypy causes an error
+      # https://foss.heptapod.net/pypy/pypy/-/issues/3640
+      # py.error.ENOENT: [No such file or directory]:
+      # listdir('/home/runner/work/tox-gh-actions/tox-gh-actions/.tox/dist/
+      # warnings.warn(f\'"{wd.path}" is shallow and may cause errors\')',)
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -34,12 +40,12 @@ jobs:
     - name: Test with tox
       run: tox
     - name: Upload coverage.xml
-      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.9' }}
-      uses: actions/upload-artifact@v2
+      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11' }}
+      uses: actions/upload-artifact@v3
       with:
         name: tox-gh-actions-coverage
         path: coverage.xml
         if-no-files-found: error
     - name: Upload coverage.xml to codecov
-      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.9' }}
-      uses: codecov/codecov-action@v1
+      if: ${{ matrix.platform == 'ubuntu-latest' && matrix.python-version == '3.11' }}
+      uses: codecov/codecov-action@v2
diff --git a/setup.cfg b/setup.cfg
index e1d6b2c..0a7736c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,6 +27,7 @@ classifiers =
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Software Development :: Testing
@@ -78,14 +79,15 @@ envlist =
     black
     flake8
     mypy
-    {py37,py38,py39,py310,pypy2,pypy3}-toxlatest
+    {py37,py38,py39,py310,py311,pypy2,pypy3}-toxlatest
 
 [gh-actions]
 python =
     3.7: py37
-    3.8: py38, black, flake8
-    3.9: py39, mypy
-    3.10: py310
+    3.8: py38
+    3.9: py39
+    3.10: py310, black, flake8, mypy
+    3.11: py311
     pypy-2: pypy2
     pypy-3: pypy3