diff --git a/composer.json b/composer.json
index b19cf1c7..65e4e985 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     ],
     "require": {
         "php": "^7.2 || ^8.0",
-        "phpunit/phpunit": "^7.5.0 || ^8.0 || ^9.0",
+        "phpunit/phpunit": "^7.5.0 || ^8.0 || ^9.0 || ^10.0",
         "symfony/browser-kit": "^4.4 || ^5.1 || ^6.0",
         "symfony/framework-bundle": "^4.4 || ^5.1 || ^6.0"
     },
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 95a886a8..25fdef43 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,19 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
 <!-- https://phpunit.de/manual/3.7/en/appendixes.configuration.html -->
 <phpunit
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/6.5/phpunit.xsd"
+    xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.0/phpunit.xsd"
     bootstrap="tests/App/bootstrap.php"
     colors="true"
     beStrictAboutOutputDuringTests="true"
+    cacheDirectory=".phpunit.cache"
 >
-
     <php>
-        <server name="KERNEL_CLASS" value="Liip\Acme\Tests\App\AppKernel" />
+        <server name="KERNEL_CLASS" value="Liip\Acme\Tests\App\AppKernel"/>
         <env name="SYMFONY_DEPRECATIONS_HELPER" value="weak"/>
     </php>
-
     <testsuites>
         <testsuite name="Project Test Suite">
             <directory>tests/Command</directory>
@@ -21,10 +19,9 @@
             <directory>tests/Test</directory>
         </testsuite>
     </testsuites>
-
-    <filter>
-        <whitelist>
+    <coverage>
+        <include>
             <directory>src</directory>
-        </whitelist>
-    </filter>
+        </include>
+    </coverage>
 </phpunit>
diff --git a/src/Utils/HttpAssertions.php b/src/Utils/HttpAssertions.php
index 5e9c6adc..c561218c 100644
--- a/src/Utils/HttpAssertions.php
+++ b/src/Utils/HttpAssertions.php
@@ -98,7 +98,10 @@ public static function assertValidationErrors(array $expected, ContainerInterfac
         }
 
         if (!$container->has('liip_functional_test.validator')) {
-            trigger_error(sprintf('Method %s() can not be used as the validation component of the Symfony framework is disabled.', __METHOD__), \E_USER_WARNING);
+            self::fail(sprintf(
+                'Method %s() can not be used as the validation component of the Symfony framework is disabled.',
+                __METHOD__
+            ));
         }
 
         self::assertThat(