diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index af7abf2..5850976 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,13 +17,18 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        otp: ["erlang@24", "erlang"]
+        pair:
+          - elixir: "1.13"
+            otp: "24.3.4.10"
+          - elixir: "1.17"
+            otp: "27.0.1"
     steps:
       - uses: actions/checkout@v4
-      - name: Install Erlang and Elixir with Homebrew
-        run: |
-          brew install ${{ matrix.otp }}
-          mix local.hex --force
+      - run: |
+          echo "elixir ${{ matrix.pair.elixir }}" >> .tool-versions
+          echo "erlang ${{ matrix.pair.otp }}" >> .tool-versions
+          cat .tool-versions
+      - uses: asdf-vm/actions/install@v3
       - run: mix format --check-formatted
       - run: mix test
   test_ubuntu: