diff --git a/.github/actions/set-up-environment/action.yml b/.github/actions/set-up-environment/action.yml
new file mode 100644
index 00000000..1f2c4348
--- /dev/null
+++ b/.github/actions/set-up-environment/action.yml
@@ -0,0 +1,17 @@
+name: 'Set up environment'
+description: 'Sets up Node and installs dependencies'
+runs:
+  using: 'composite'
+  steps:
+    - name: Set up Node
+      uses: actions/setup-node@v4
+      with:
+        node-version: 18
+    - name: Cache dependencies
+      uses: actions/cache@v4
+      with:
+        path: ~/.npm
+        key: node-modules-${{ hashFiles('**/package-lock.json') }}
+    - name: Install dependencies
+      run: npm ci
+      shell: bash
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 446e5678..65b245fd 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -5,37 +5,19 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
+      - name: Check out code
         uses: actions/checkout@v4
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 18
-      - name: Cache dependencies
-        uses: actions/cache@v4
-        with:
-          path: ~/.npm
-          key: node-modules-${{ hashFiles('**/package-lock.json') }}
-      - name: Install dependencies
-        run: npm ci
+      - name: Set up environment
+        uses: ./.github/actions/set-up-environment
       - name: Build app
         run: npm run build
   unit_tests:
     needs: build
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
+      - name: Check out code
         uses: actions/checkout@v4
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 18
-      - name: Cache dependencies
-        uses: actions/cache@v4
-        with:
-          path: ~/.npm
-          key: node-modules-${{ hashFiles('**/package-lock.json') }}
-      - name: Install dependencies
-        run: npm ci
+      - name: Set up environment
+        uses: ./.github/actions/set-up-environment
       - name: Run tests
         run: npm test