diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..ab3ec24
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,74 @@
+name: Tests
+
+on:
+  pull_request:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        php: ['8.2', '8.3', '8.4']
+
+    name: PHP ${{ matrix.php }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: none
+
+      - name: Cache Composer downloads
+        uses: actions/cache@v4
+        with:
+          path: ~/.composer/cache/files
+          key: ${{ runner.os }}-php-${{ matrix.php }}-composer-${{ hashFiles('composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-${{ matrix.php }}-composer-
+
+      - name: Resolve Composer dependencies
+        run: composer update --prefer-dist --no-interaction --no-progress
+
+      - name: Run tests
+        run: ./vendor/bin/pest --parallel --processes=24
+
+  php81-smoke:
+    runs-on: ubuntu-latest
+
+    name: PHP 8.1 smoke
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.1'
+          coverage: none
+
+      - name: Cache Composer downloads
+        uses: actions/cache@v4
+        with:
+          path: ~/.composer/cache/files
+          key: ${{ runner.os }}-php-8.1-composer-${{ hashFiles('composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-8.1-composer-
+
+      - name: Install runtime dependencies
+        run: composer install --no-dev --prefer-dist --no-interaction --no-progress
+
+      - name: Lint package source
+        run: |
+          php -l helper.php
+          find src config -name '*.php' -print0 | xargs -0 -n 1 php -l
+
+      - name: Bootstrap package autoload
+        run: |
+          php -r 'require "vendor/autoload.php"; exit((function_exists("first_value") && enum_exists("Midnite81\\Core\\Enums\\DateFormat")) ? 0 : 1);'