diff --git a/appveyor.yml b/appveyor.yml
index 25d4dc7..ea2137b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,6 +7,10 @@ environment:
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
       PYTHON: "C:\\Python39-x64"
 
+    - job_group: tests
+      APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu2004
+      PYTHON: "3.10"
+
     - job_group: tests
       APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu2004
       PYTHON: "3.9"
@@ -30,7 +34,7 @@ environment:
     - job_name: deploy
       job_depends_on: tests
       APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu2004
-      PYTHON: "3.9"
+      PYTHON: "3.10"
 
   GIT_TOKEN:
     secure: +jQhxLpePj6hdDryfET/XpLo7VL9fhDXVHlwLOPp/nRDYe97TJAfd0XCTuPz1qkT
@@ -54,6 +58,7 @@ for:
       - cmd: 'echo %PATH%'
       # Shared config.
       - python -m pip install --upgrade pip setuptools nox
+      - python --version
     test_script:
       # GNU/Linux test.
       - sh: nox --non-interactive --error-on-missing-interpreters --session test lint --python $PYTHON
diff --git a/noxfile.py b/noxfile.py
index e4f77ff..3d77d0a 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -9,7 +9,7 @@
 import nox
 
 
-PYTHONS = ["3.6", "3.7", "3.8", "3.9"]
+PYTHONS = ["3.6", "3.7", "3.8", "3.9", "3.10"]
 """The newest supported Python shall be listed LAST."""
 
 nox.options.error_on_external_run = True