diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 26c9615..ad5c968 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -9,25 +9,17 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest, windows-latest]
-        php: [7.4, 7.3, 7.2]
+        php: [8.0, 7.4, 7.3, 7.2]
         dependency-version: [prefer-lowest, prefer-stable]
-        include:
-          - testbench: 5.*
 
     name: P${{ matrix.php }} - ${{ matrix.dependency-version }} - ${{ matrix.os }}
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v1
-
-      - name: Cache dependencies
-        uses: actions/cache@v1
-        with:
-          path: ~/.composer/cache/files
-          key: dependencies-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
+        uses: actions/checkout@v2
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@v1
+        uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
           extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv, imagick
diff --git a/composer.json b/composer.json
index 5c3dee1..20e3dc2 100644
--- a/composer.json
+++ b/composer.json
@@ -16,11 +16,10 @@
         }
     ],
     "require": {
-        "php": "^7.2"
+        "php": "^7.2|^8.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.16",
-        "orchestra/testbench": "5.*",
         "phpunit/phpunit": "^9.0"
     },
     "autoload": {