diff --git a/lib/Doctrine/DBAL/Tools/Console/ConsoleRunner.php b/lib/Doctrine/DBAL/Tools/Console/ConsoleRunner.php
index e3389cc9e4f..f0e65c33928 100644
--- a/lib/Doctrine/DBAL/Tools/Console/ConsoleRunner.php
+++ b/lib/Doctrine/DBAL/Tools/Console/ConsoleRunner.php
@@ -12,7 +12,6 @@
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Helper\HelperSet;
 use TypeError;
-use function assert;
 use function sprintf;
 use function trigger_error;
 use const E_USER_DEPRECATED;
@@ -51,7 +50,6 @@ public static function run($helperSetOrConnectionProvider, $commands = [])
         $cli->setCatchExceptions(true);
 
         $connectionProvider = null;
-        assert($connectionProvider instanceof ConnectionProvider || $connectionProvider === null);
         if ($helperSetOrConnectionProvider instanceof HelperSet) {
             @trigger_error(sprintf('Passing an instance of "%s" as the first argument is deprecated. Pass an instance of "%s" instead.', HelperSet::class, ConnectionProvider::class), E_USER_DEPRECATED);
             $connectionProvider = null;