diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e1da142e..556d387d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,8 +60,8 @@ jobs:
   # Note that m1 macOS is tested via CirrusCI.
   supported:
     needs: pre-job
-    runs-on: ${{ matrix.info.os }}
     if: ${{ needs.pre-job.outputs.should_skip != 'true' }}
+    runs-on: ${{ matrix.info.os }}
     timeout-minutes: 18
     strategy:
       fail-fast: false
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 5210dc02..471be514 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -34,8 +34,15 @@ jobs:
   coverage:
     needs: pre-job
     if: ${{ needs.pre-job.outputs.should_skip != 'true' }}
+    runs-on: ${{ matrix.info.os }}
     timeout-minutes: 18
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        info:
+          - { os: "ubuntu-latest" }
+          - { os: "macos-12" }
+          - { os: "windows-2019" }
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -64,3 +71,4 @@ jobs:
           files: lcov.info
           fail_ci_if_error: true
           token: ${{ secrets.CODECOV_TOKEN }}
+          flags: ${{ matrix.info.os }}