Fixed PHPUnit Warning

Author: lyrixx

.travis.yml

@@ -26,6 +26,8 @@ matrix:
       env: SYMFONY_VERSION="3.4.*" DEPENDENCIES=dev
     - php: 7.0
     - php: 7.1
+      # There is a bug in PHPUnit 5.7
+      env: SYMFONY_PHPUNIT_VERSION=6.5
     - php: 7.2
     - php: 7.3
     # Test against dev versions

Tests/DependencyInjection/Compiler/LoggerChannelPassTest.php

@@ -140,6 +140,9 @@ public function testChannelsConfigurationOptionSupportsAppChannel()
 
         $container->setParameter('monolog.additional_channels', array('app'));
         $container->compile();
+
+        // the test ensures that the validation does not fail (i.e. it does not throw any exceptions)
+        $this->addToAssertionCount(1);
     }
 
     private function getContainer()