diff --git a/.github/workflows/pytest.yaml b/.github/workflows/pytest.yaml
index 465c897..10782d0 100644
--- a/.github/workflows/pytest.yaml
+++ b/.github/workflows/pytest.yaml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8"]
+        python-version: ["3.8", "3.11"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/tox.ini b/tox.ini
index 3ccf8a9..19cdbf1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,5 +17,7 @@ deps =
     xarray21: xarray>=0.21.0,<0.22.0
     xarray202203: xarray>=2022.03.0,<2022.04.0
     xarray202206: xarray>=2022.06.0,<2022.07.0
+    xarray202306: xarray>=2023.06.0,<2023.07.0
+    xarray202312: xarray>=2023.12.0,<2024.01.0
 commands =
     pytest