diff --git a/setup.cfg b/.flake8
similarity index 100%
rename from setup.cfg
rename to .flake8
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3cfd2f00..1ab9834c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
@@ -18,6 +18,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Set up Miniconda
         uses: conda-incubator/setup-miniconda@v2
+        if: matrix.python-version != '3.11-dev'
         with:
           auto-update-conda: true
           python-version: ${{ matrix.python-version }}
@@ -26,6 +27,10 @@ jobs:
           python -m pip install --disable-pip-version-check .
       - name: Run tests on ${{ matrix.os }}
         run: nox --non-interactive --error-on-missing-interpreter --session "tests-${{ matrix.python-version }}" -- --full-trace
+        if: matrix.python-version != '3.11-dev'
+      - name: Run tests on ${{ matrix.os }}
+        if: matrix.python-version == '3.11-dev'
+        run: nox --non-interactive --error-on-missing-interpreter --session "tests-3.11" -- --full-trace
   lint:
     runs-on: ubuntu-latest
     steps:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index edd1c703..2946c767 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -91,9 +91,3 @@ repos:
       - id: rst-backticks
       - id: rst-directive-colons
       - id: rst-inline-touching-normal
-
-  - repo: https://github.com/mgedmin/check-manifest
-    rev: "0.48"
-    hooks:
-      - id: check-manifest
-        stages: [manual]
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index e147a272..00000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,3 +0,0 @@
-recursive-include nox *.jinja2
-include nox/py.typed .github/action_helper.py
-recursive-include tests *.py
diff --git a/noxfile.py b/noxfile.py
index 154a1002..fc4f71b6 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -31,7 +31,7 @@
     nox.options.sessions.append("conda_tests")
 
 
-@nox.session(python=["3.7", "3.8", "3.9", "3.10"])
+@nox.session(python=["3.7", "3.8", "3.9", "3.10", "3.11"])
 def tests(session: nox.Session) -> None:
     """Run test suite with pytest."""
     session.create_tmp()  # Fixes permission errors on Windows
diff --git a/pyproject.toml b/pyproject.toml
index 8842712c..ec45992d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,6 +44,7 @@ classifiers = [
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
   "Topic :: Software Development :: Testing",
 ]
 [project.optional-dependencies]
@@ -97,15 +98,3 @@ enable_error_code = [ "ignore-without-code", "redundant-expr", "truthy-bool" ]
 [[tool.mypy.overrides]]
 module = [ "argcomplete", "colorlog.*", "py", "tox.*" ]
 ignore_missing_imports = true
-
-[tool.check-manifest]
-ignore = [
-  "action.yml",
-  "docs/**",
-  "noxfile.py",
-  "requirements-conda-test.txt",
-  "requirements-dev.txt",
-  "requirements-test.txt",
-  "*.md",
-  ".*",
-]