diff --git a/.github/workflows/downstream.yml b/.github/workflows/downstream.yml
index 1c657ca81..df7e56d5c 100644
--- a/.github/workflows/downstream.yml
+++ b/.github/workflows/downstream.yml
@@ -8,9 +8,10 @@ on:
 jobs:
   tests:
     name: ${{ matrix.ref }}
-    runs-on: ubuntu-latest
+    runs-on: "${{ matrix.os }}-latest"
     strategy:
       matrix:
+        os: [Ubuntu, Windows]
         ref: ["refs/pull/6616/head"]
       fail-fast: false
     defaults: