diff --git a/.github/workflows/prepare-for-production.yml b/.github/workflows/prepare-for-production.yml
new file mode 100644
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--- /dev/null
+++ b/.github/workflows/prepare-for-production.yml
@@ -0,0 +1,38 @@
+# Ensure a consistent state for production releases
+name: Prepare for production
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+permissions:
+  contents: read
+
+jobs:
+  build-and-test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate --strict
+
+    - name: Cache Composer packages
+      id: composer-cache
+      uses: actions/cache@v3
+      with:
+        path: vendor
+        key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-php-
+
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress
+
+    - name: Run test suite
+      run: vendor/bin/pest
+