diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 97b62fd..1cc94be 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,8 +52,8 @@ jobs:
       uses: shivammathur/setup-php@v2
       with:
         php-version: '${{ matrix.php }}'
-        tools: composer
-        extensions: 'xdebug'
+        ini-values: zend.assertions=1, error_reporting=-1, display_errors=On, log_errors_max_len=0
+        coverage: 'xdebug'
     - uses: actions/checkout@v4
 
     - name: Install Composer dependencies & cache dependencies
diff --git a/phpunit.xml b/phpunit.xml
index 99613b4..82b4067 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0"?>
-<phpunit bootstrap="tests/Mf2/bootstrap.php">
+<phpunit bootstrap="tests/Mf2/bootstrap.php" convertDeprecationsToExceptions="true">
 	<testsuites>
 		<testsuite name="php-mf2">
 			<directory suffix="Test.php">tests/Mf2</directory>