diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c90a1c0..90f368c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -75,7 +75,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        # ubuntu-latest = x86_64, ubuntu-24.04-arm = native aarch64 (no QEMU),
+        # macos-latest builds both arm64 + x86_64 (see [tool.cibuildwheel.macos]),
+        # windows-latest = win_amd64.
+        os: [ubuntu-latest, ubuntu-24.04-arm, macos-latest, windows-latest]
     steps:
       - name: Checkout
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1