Fix build

Author: ondrejmirtes

tests/Symfony/NeonTest.php

@@ -19,11 +19,11 @@ public function testExtensionNeon(): void
 
 ], []);
 $parameters = $container->getParameters();
-$this->assertArrayHasKey('rootDir', $parameters);
-$this->assertSame(realpath(__DIR__ . '/../../vendor/phpstan/phpstan'), $parameters['rootDir']);
+self::assertArrayHasKey('rootDir', $parameters);
+self::assertSame(realpath(__DIR__ . '/../../vendor/phpstan/phpstan'), $parameters['rootDir']);
 
-$this->assertArrayHasKey('symfony', $parameters);
-$this->assertSame([
+self::assertArrayHasKey('symfony', $parameters);
+self::assertSame([
 'container_xml_path' => __DIR__ . '/container.xml',
 'constant_hassers' => true,
 'console_application_loader' => null,