diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2fa47f2..26810b2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,10 @@ on:
 jobs:
   test:
     runs-on: ubuntu-latest
+    env:
+      # Override mise.toml so each matrix job installs and activates the Node
+      # version it is responsible for testing.
+      MISE_NODE_VERSION: ${{ matrix.node-version }}
     strategy:
       matrix:
         # 22.12.0 verifies package.json's stated `engines.node` floor; 24 is
@@ -18,11 +22,10 @@ jobs:
     steps:
       - uses: actions/checkout@v7
 
-      - name: Set up Node
-        uses: actions/setup-node@v7
+      - name: Set up toolchain
+        uses: jdx/mise-action@v4
         with:
-          node-version: ${{ matrix.node-version }}
-          cache: npm
+          cache_key: "{{default}}-node-${{ matrix.node-version }}"
 
       - name: Install dependencies
         run: npm ci