diff --git a/core/lib/Drupal/Core/Command/DevInstallCommand.php b/core/lib/Drupal/Core/Command/DevInstallCommand.php
index 93f0ce89e0..7eb73d939c 100644
--- a/core/lib/Drupal/Core/Command/DevInstallCommand.php
+++ b/core/lib/Drupal/Core/Command/DevInstallCommand.php
@@ -59,7 +59,7 @@ protected function execute(InputInterface $input, OutputInterface $output) {
 
     if (!$input->getOption('force') && $this->isDrupalInstalled()) {
       $question_helper = new QuestionHelper();
-      if (!$question_helper->ask($input, $output, new ConfirmationQuestion('There is already an existing installation. Confirm whether you want to override it. (y/n)'))) {
+      if (!$question_helper->ask($input, $output, new ConfirmationQuestion('There is already an existing installation. Confirm whether you want to override it. (y/N) ', FALSE))) {
         return;
       }
     }
@@ -76,7 +76,7 @@ protected function isDrupalInstalled() {
     $request = Request::createFromGlobals();
     DrupalKernel::createFromRequest($request, $this->classLoader, 'prod');
 
-    return ($connection = Database::getConnection()) && $connection->schema()->tableExists('sessions');
+    return !empty(Database::getConnectionInfo());
   }
 
   /**