diff --git a/docs/book/src/developers/development.md b/docs/book/src/developers/development.md
index afbc3fa92d3..3cc447e37a4 100644
--- a/docs/book/src/developers/development.md
+++ b/docs/book/src/developers/development.md
@@ -504,6 +504,7 @@ You can optionally set the following variables:
 | `CI_VERSION`                | Provide a custom CI version of Kubernetes. By default, the latest master commit will be used.                                              |
 | `TEST_CCM`                  | Build a cluster that uses custom versions of the Azure cloud-provider cloud-controller-manager and node-controller-manager images          |
 | `EXP_MACHINE_POOL`          | Use [Machine Pool](../topics/machinepools.md) for worker machines.                                                                            |
+| `TEST_WINDOWS`                  | Build a cluster that has Windows worker nodes.          |
 | `REGISTRY`                  | Registry to push any custom k8s images or cloud provider images built.                                                                     |
 | `CLUSTER_TEMPLATE`          | Use a custom cluster template. By default, the script will choose the appropriate cluster template based on existing environment variabes. |
 
diff --git a/scripts/ci-entrypoint.sh b/scripts/ci-entrypoint.sh
index c346c4a93c0..3c6c7ecc942 100755
--- a/scripts/ci-entrypoint.sh
+++ b/scripts/ci-entrypoint.sh
@@ -105,6 +105,12 @@ select_cluster_template() {
             export CLUSTER_TEMPLATE="${CLUSTER_TEMPLATE/custom-builds/custom-builds-machine-pool}"
         fi
     fi
+
+    # this requires k8s 1.22+
+    if [[ -n "${TEST_WINDOWS:-}" ]]; then
+        export WINDOWS_WORKER_MACHINE_COUNT="${WINDOWS_WORKER_MACHINE_COUNT:-2}"
+        export K8S_FEATURE_GATES="WindowsHostProcessContainers=true"
+    fi
 }
 
 create_cluster() {