diff --git a/tests/Node/Expression/FilterTest.php b/tests/Node/Expression/FilterTest.php
index a794ceea14..d5ee15ddda 100644
--- a/tests/Node/Expression/FilterTest.php
+++ b/tests/Node/Expression/FilterTest.php
@@ -114,7 +114,7 @@ public static function provideTests(): iterable
 
         // from extension
         $node = self::createFilter($environment, $string, 'foo');
-        $tests[] = [$node, \sprintf('$this->extensions[\'%s\']->foo("abc")', \get_class(self::createExtension())), $environment];
+        $tests[] = [$node, \sprintf('$this->extensions[\'%s\']->foo("abc")', self::createExtension()::class), $environment];
 
         $node = self::createFilter($environment, $string, 'foobar');
         $tests[] = [$node, '$this->env->getFilter(\'foobar\')->getCallable()("abc")', $environment];