diff --git a/.travis.yml b/.travis.yml
index 39e9ef4..d7e62ef 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,14 +30,17 @@ matrix:
       dist: bionic
     - php: 7.4
       dist: bionic
+    - php: nightly
+      dist: bionic
 
 install:
-  - if [[ $setup = 'basic' ]]; then travis_retry composer install --prefer-dist --no-interaction; fi
-  - if [[ $setup = 'lowest' ]]; then travis_retry composer update --prefer-dist --no-interaction --prefer-lowest --prefer-stable; fi
+  - if [[ $setup = 'basic' && "$TRAVIS_PHP_VERSION" != "nightly" ]]; then travis_retry composer install --prefer-dist --no-interaction; fi
+  - if [[ $setup = 'lowest' && "$TRAVIS_PHP_VERSION" != "nightly" ]]; then travis_retry composer update --prefer-dist --no-interaction --prefer-lowest --prefer-stable; fi
+  - if [[ "$TRAVIS_PHP_VERSION" = "nightly" ]]; then travis_retry composer install --prefer-dist --no-interaction --ignore-platform-reqs; fi
 
 script:
   - vendor/bin/phpunit --verbose --coverage-clover=coverage.clover
 
 after_success:
-  - if [[ "$TRAVIS_PHP_VERSION" != "hhvm" ]]; then wget https://scrutinizer-ci.com/ocular.phar; fi
-  - if [[ "$TRAVIS_PHP_VERSION" != "hhvm" ]]; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
+  - if [[ "$TRAVIS_PHP_VERSION" != "nightly" ]]; then wget https://scrutinizer-ci.com/ocular.phar; fi
+  - if [[ "$TRAVIS_PHP_VERSION" != "nightly" ]]; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
diff --git a/composer.json b/composer.json
index bb47c01..e987a65 100644
--- a/composer.json
+++ b/composer.json
@@ -12,13 +12,13 @@
     }
   ],
   "require": {
-    "php": "^5.5 || ^7.0",
+    "php": "^5.5 || ^7.0 || ^8.0",
     "ext-dom": "*",
     "ext-libxml": "*",
     "symfony/css-selector": "^2.7 || ^3.0 || ^4.0 || ^5.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
+    "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0 || ^7.5"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index da5f589..1b7ae50 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -8,7 +8,6 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="false"
 >
     <testsuites>
         <testsuite name="CssToInlineStyles Tests">
diff --git a/tests/CssToInlineStylesTest.php b/tests/CssToInlineStylesTest.php
index d61df74..4fbd1b3 100644
--- a/tests/CssToInlineStylesTest.php
+++ b/tests/CssToInlineStylesTest.php
@@ -13,12 +13,18 @@ class CssToInlineStylesTest extends TestCase
      */
     protected $cssToInlineStyles;
 
-    public function setUp()
+    /**
+     * @before
+     */
+    protected function prepare()
     {
         $this->cssToInlineStyles = new CssToInlineStyles();
     }
 
-    public function tearDown()
+    /**
+     * @after
+     */
+    protected function clear()
     {
         $this->cssToInlineStyles = null;
     }