diff --git a/core/lib/Drupal/Core/Command/DevInstallCommand.php b/core/lib/Drupal/Core/Command/DevInstallCommand.php
index 1816dc76f3..032e9086d0 100644
--- a/core/lib/Drupal/Core/Command/DevInstallCommand.php
+++ b/core/lib/Drupal/Core/Command/DevInstallCommand.php
@@ -2,16 +2,15 @@
 
 namespace Drupal\Core\Command;
 
+use Drupal\Core\Database\ConnectionNotDefinedException;
 use Drupal\Core\Database\Database;
 use Drupal\Core\DrupalKernel;
+use Drupal\Core\Site\Settings;
 use Symfony\Component\Console\Command\Command;
-use Symfony\Component\Console\Helper\QuestionHelper;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\ConsoleOutputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
-use Symfony\Component\Console\Question\ConfirmationQuestion;
-use Symfony\Component\HttpFoundation\Request;
 
 /**
  * Installs a Drupal site for local testing/development.
@@ -44,7 +43,6 @@ protected function configure() {
       ->setDescription('Installs a Drupal dev site. This is not meant for production or any custom development. It is a quick and easy way to get Drupal running.')
       ->addOption('install_profile', NULL, InputOption::VALUE_OPTIONAL, 'Install profile to install the site in. Defaults to standard', 'standard')
       ->addOption('langcode', NULL, InputOption::VALUE_OPTIONAL, 'The language to install the site in. Defaults to en', 'en')
-      ->addOption('force', 'y', InputOption::VALUE_NONE, 'Force overriding the existing installation')
       ->addOption('site_name', NULL, InputOption::VALUE_OPTIONAL, 'Set the site name.', 'Drupal')
       ->addUsage('--install_profile demo_umami --langcode fr');
 
@@ -55,15 +53,22 @@ protected function configure() {
    * {@inheritdoc}
    */
   protected function execute(InputInterface $input, OutputInterface $output) {
-    $this->changeRoot();
-
-    if (!$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) ', FALSE))) {
-        return;
-      }
+    if (!extension_loaded('pdo_sqlite')) {
+      $output->getErrorOutput()->writeln('You need to have sqlite installed.');
+      return;
     }
+
+    // Change the directory to the Drupal root.
+    chdir(dirname(dirname(dirname(dirname(dirname(__DIR__))))));
+
     // Check whether there is already an installation.
+    if ($this->isDrupalInstalled()) {
+      // Do not fail if the site is already installed so this command can be
+      // chained with DevStartCommand.
+      $output->writeln('Drupal is already installed.');
+      return;
+    }
+
     $this->install($this->classLoader, $output, $input->getOption('install_profile'), $input->getOption('langcode'), $this->getSitePath(), $input->getOption('site_name'));
   }
 
@@ -73,24 +78,19 @@ protected function execute(InputInterface $input, OutputInterface $output) {
    * @return bool
    */
   protected function isDrupalInstalled() {
-    $request = Request::createFromGlobals();
-    DrupalKernel::createFromRequest($request, $this->classLoader, 'prod');
-
+    try {
+      $kernel = new DrupalKernel('prod', $this->classLoader, FALSE);
+      $kernel::bootEnvironment();
+      $kernel->setSitePath($this->getSitePath());
+      Settings::initialize($kernel->getAppRoot(), $kernel->getSitePath(), $this->classLoader);
+      $kernel->boot();
+    }
+    catch (ConnectionNotDefinedException $e) {
+      return FALSE;
+    }
     return !empty(Database::getConnectionInfo());
   }
 
-  /**
-   * Changes the directory to the Drupal root.
-   *
-   * @return string
-   *   Returns the path to the Drupal root.
-   */
-  protected function changeRoot() {
-    $root = dirname(dirname(dirname(dirname(dirname(__DIR__)))));
-    chdir($root);
-    return $root;
-  }
-
   /**
    * Installs Drupal with specified installation profile.
    *
@@ -106,7 +106,6 @@ protected function changeRoot() {
    *   (optional) The path to install the site to, like 'sites/default'.
    */
   protected function install($class_loader, ConsoleOutputInterface $output, $profile = 'standard', $langcode = 'en', $site_path = 'sites/default', $site_name = 'Drupal') {
-
     $parameters = [
       'interactive' => FALSE,
       'site_path' => $site_path,
@@ -140,36 +139,17 @@ protected function install($class_loader, ConsoleOutputInterface $output, $profi
       ],
     ];
 
-    require_once 'core/includes/install.core.inc';
-
-    if (!extension_loaded('pdo_sqlite')) {
-      $output->getErrorOutput()->writeln('You need to have sqlite installed.');
-      return;
-    }
-
-    // If we have a custom site path, we need to create the sites directory
-    // first.
-    if ($site_path && !file_exists($site_path)) {
+    // Create the directory and settings.php if not there so that the installer
+    // works.
+    if (!file_exists($site_path)) {
       mkdir($site_path, 0775);
     }
-
-    if (file_exists("{$site_path}/settings.php")) {
-      $result = unlink("{$site_path}/settings.php");
-      if ($result === FALSE) {
-        $output->getErrorOutput()->writeln('Removing settings.php failed, please do it manually ...');
-        return;
-      }
-    }
-    copy("sites/default/default.settings.php", "{$site_path}/settings.php");
-    if (file_exists("{$site_path}/files/.sqlite")) {
-      $result = unlink("{$site_path}/files/.sqlite");
-      if ($result === FALSE) {
-        $output->getErrorOutput()->writeln('Removing .sqlite failed, please do it manually ...');
-        return;
-      }
+    if (!file_exists("{$site_path}/settings.php")) {
+      copy("sites/default/default.settings.php", "{$site_path}/settings.php");
     }
 
     $output->writeln('Drupal installation started. This could take a minute.');
+    require_once 'core/includes/install.core.inc';
     install_drupal($class_loader, $parameters);
     $output->writeln('Drupal successfully installed.');
   }
diff --git a/core/lib/Drupal/Core/Command/DevStartCommand.php b/core/lib/Drupal/Core/Command/DevStartCommand.php
index 056bc7cf12..0652cbf517 100644
--- a/core/lib/Drupal/Core/Command/DevStartCommand.php
+++ b/core/lib/Drupal/Core/Command/DevStartCommand.php
@@ -65,8 +65,7 @@ protected function execute(InputInterface $input, OutputInterface $output) {
    *   Exception thrown if kernel does not boot.
    */
   protected function boot() {
-    $root = dirname(dirname(dirname(dirname(dirname(__DIR__)))));
-    chdir($root);
+    chdir(dirname(dirname(dirname(dirname(dirname(__DIR__))))));
 
     $kernel = new DrupalKernel('prod', $this->classLoader, FALSE);
     $kernel::bootEnvironment();
diff --git a/core/tests/Drupal/Tests/Core/Command/DevSiteTest.php b/core/tests/Drupal/Tests/Core/Command/DevSiteTest.php
index 49f154026c..c0f309963f 100644
--- a/core/tests/Drupal/Tests/Core/Command/DevSiteTest.php
+++ b/core/tests/Drupal/Tests/Core/Command/DevSiteTest.php
@@ -30,32 +30,33 @@ public function testDevSiteCommands() {
     $test_db = new TestDatabase();
 
     // Install a site.
-    $command = "{$php} core/scripts/dev-site.php install --force --install_profile=testing --site_name='Test site {$test_db->getDatabasePrefix()}'";
-    $process = new Process($command, NULL, ['DRUPAL_DEV_SITE_PATH' => $test_db->getTestSitePath()]);
-    $process->inheritEnvironmentVariables();
-    $process->setTimeout(500);
-    $result = $process->run();
+    $install_command = "{$php} core/scripts/dev-site.php install --install_profile=testing --site_name='Test site {$test_db->getDatabasePrefix()}'";
+    $install_process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $test_db->getTestSitePath()]);
+    $install_process->inheritEnvironmentVariables();
+    $install_process->setTimeout(500);
+    $result = $install_process->run();
     $this->assertSame(0, $result);
-    $this->assertContains('Drupal installation started. This could take a minute.', $process->getOutput());
-    $this->assertContains('Drupal successfully installed.', $process->getOutput());
+    $this->assertContains('Drupal installation started. This could take a minute.', $install_process->getOutput());
+    $this->assertContains('Drupal successfully installed.', $install_process->getOutput());
 
     // Run the PHP built-in webserver.
-    $process = new Process("{$php} core/scripts/dev-site.php start --suppress_login --no_tty", NULL, ['DRUPAL_DEV_SITE_PATH' => $test_db->getTestSitePath()]);
-    $process->inheritEnvironmentVariables();
-    $process->start();
+    $start_command = "{$php} core/scripts/dev-site.php start --suppress_login --no_tty";
+    $start_process = new Process($start_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $test_db->getTestSitePath()]);
+    $start_process->inheritEnvironmentVariables();
+    $start_process->start();
     $guzzle = new Client();
     $port = FALSE;
     $output = '';
-    while ($process->isRunning()) {
-      $output .= $process->getOutput();
-      if (preg_match('/localhost:(\d+)/', $process->getOutput(), $match)) {
+    while ($start_process->isRunning()) {
+      $output .= $start_process->getOutput();
+      if (preg_match('/localhost:(\d+)/', $start_process->getOutput(), $match)) {
         $port = $match[1];
         break;
       }
       // Wait for more output.
       sleep(1);
     }
-    $this->assertNotFalse($port, "Web server running.: " . $output . "\n\nError output\n" . $process->getErrorOutput());
+    $this->assertNotFalse($port, "Web server running.: " . $output . "\n\nError output\n" . $start_process->getErrorOutput());
 
     // Give the server a couple of seconds to be ready.
     sleep(2);
@@ -71,7 +72,23 @@ public function testDevSiteCommands() {
     $response = $guzzle->get('http://localhost:' . $port, ['cookies' => $cookieJar]);
     $content = (string) $response->getBody();
     $this->assertContains('Test site ' . $test_db->getDatabasePrefix(), $content);
-    $process->stop();
+
+    // Try to re-install over the top of an existing site.
+    $install_command = "{$php} core/scripts/dev-site.php install --install_profile=testing --site_name='Test another site {$test_db->getDatabasePrefix()}'";
+    $install_process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $test_db->getTestSitePath()]);
+    $install_process->inheritEnvironmentVariables();
+    $install_process->setTimeout(500);
+    $result = $install_process->run();
+    $this->assertSame(0, $result);
+    $this->assertContains('Drupal is already installed.', $install_process->getOutput());
+
+    // Ensure the site name has not changed.
+    $response = $guzzle->get('http://localhost:' . $port, ['cookies' => $cookieJar]);
+    $content = (string) $response->getBody();
+    $this->assertContains('Test site ' . $test_db->getDatabasePrefix(), $content);
+
+    // Stop the web server.
+    $start_process->stop();
 
     // @todo use the tear down command from
     //   https://www.drupal.org/project/drupal/issues/2926633