diff --git a/.cirun.yml b/.cirun.yml
index 263d0faaa..e2c04bf00 100644
--- a/.cirun.yml
+++ b/.cirun.yml
@@ -2,8 +2,8 @@ runners:
   - name: aws-gpu-runner
     cloud: aws
     instance_type: g4dn.xlarge
-    machine_image: ami-067a4ba2816407ee9
-    region: eu-north-1
+    machine_image: ami-0285bfb786db80af3
+    region: eu-west-1
     preemptible:
       - true
       - false
diff --git a/.github/workflows/test-gpu.yml b/.github/workflows/test-gpu.yml
index bd4263ff2..6f758e718 100644
--- a/.github/workflows/test-gpu.yml
+++ b/.github/workflows/test-gpu.yml
@@ -72,7 +72,7 @@ jobs:
       - name: Install AnnData
         run: |
           uv venv
-          uv pip install -e ".[dev,test,cu12]" -c ci/constraints.txt
+          uv pip install -e ".[dev,test,cu13]" -c ci/constraints.txt
 
       - name: Env list
         run: uv pip list
diff --git a/pyproject.toml b/pyproject.toml
index fa5f83322..8a5a106f0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -101,7 +101,7 @@ test-min = [
 test = [ "anndata[test-min,lazy]", "fast-array-utils>=1.2.3" ]
 gpu = [ "cupy" ]
 cu12 = [ "cupy-cuda12x" ]
-cu11 = [ "cupy-cuda11x" ]
+cu13 = [ "cupy-cuda13x" ]
 # requests and aiohttp needed for zarr remote data
 lazy = [ "xarray>=2025.06.1", "aiohttp", "requests", "anndata[dask]" ]
 # https://github.com/dask/dask/issues/11290