diff -u b/core/lib/Drupal/Core/Command/QuickStartCommand.php b/core/lib/Drupal/Core/Command/QuickStartCommand.php
--- b/core/lib/Drupal/Core/Command/QuickStartCommand.php
+++ b/core/lib/Drupal/Core/Command/QuickStartCommand.php
@@ -31,7 +31,6 @@
       ->addOption('host', NULL, InputOption::VALUE_OPTIONAL, 'Provide a host for the server to run on. Defaults to 127.0.0.1.', '127.0.0.1')
       ->addOption('port', NULL, InputOption::VALUE_OPTIONAL, 'Provide a port for the server to run on. Will be determined automatically if none supplied.')
       ->addOption('suppress-login', 's', InputOption::VALUE_NONE, 'Disable opening a login URL in a browser.')
-      ->addOption('show-server-output', NULL, InputOption::VALUE_NONE, 'Show output from the PHP development server.')
       ->addUsage('demo_umami --langcode fr');
 
     parent::configure();
@@ -63,9 +62,6 @@
       if ($input->getOption('suppress-login')) {
         $arguments['--suppress-login'] = TRUE;
       }
-      if ($input->getOption('show-server-output')) {
-        $arguments['--show-server-output'] = TRUE;
-      }
       $serverInput = new ArrayInput($arguments);
       $returnCode = $command->run($serverInput, $output);
     }
diff -u b/core/lib/Drupal/Core/Command/ServerCommand.php b/core/lib/Drupal/Core/Command/ServerCommand.php
--- b/core/lib/Drupal/Core/Command/ServerCommand.php
+++ b/core/lib/Drupal/Core/Command/ServerCommand.php
@@ -15,6 +15,7 @@
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Process\PhpExecutableFinder;
 use Symfony\Component\Process\Process;
+use Symfony\Component\Process\ProcessUtils;
 
 /**
  * Runs the PHP webserver for a Drupal site for local testing/development.
@@ -46,8 +47,7 @@
     $this->setDescription('Starts up a webserver for a site.')
       ->addOption('host', NULL, InputOption::VALUE_OPTIONAL, 'Provide a host for the server to run on. Defaults to 127.0.0.1.', '127.0.0.1')
       ->addOption('port', NULL, InputOption::VALUE_OPTIONAL, 'Provide a port for the server to run on. Will be determined automatically if none supplied.')
-      ->addOption('suppress-login', 's', InputOption::VALUE_NONE, 'Disable opening a login URL in a browser.')
-      ->addOption('show-server-output', NULL, InputOption::VALUE_NONE, 'Show output from the PHP development server.');
+      ->addOption('suppress-login', 's', InputOption::VALUE_NONE, 'Disable opening a login URL in a browser.');
   }
 
   /**
@@ -130,29 +130,40 @@
    *
    * @param string $url
    *   The URL to browser to.
-   *
-   * @return int
-   *   The exit code of opening up a browser.
+   * @param \Symfony\Component\Console\Style\SymfonyStyle $io
+   *   The IO.
+   * @param int $wait
+   *   Time in seconds to wait for before opening the browser.
    */
-  protected function openBrowser($url, SymfonyStyle $io) {
+  protected function openBrowser($url, SymfonyStyle $io, $wait = 0) {
     $url = escapeshellarg($url);
 
     $is_windows = defined('PHP_WINDOWS_VERSION_BUILD');
     if ($is_windows) {
-      $process = new Process('start "web" explorer "' . $url . '"');
-      return $process->run();
+      $cmd = 'start "web" explorer "' . $url . '"';
     }
 
     $is_linux = (new Process('which xdg-open'))->run();
     $is_osx = (new Process('which open'))->run();
     if ($is_linux === 0) {
-      return (new Process('xdg-open ' . $url))->run();
+      $cmd = 'xdg-open ' . $url;
     }
     elseif ($is_osx === 0) {
-      return (new Process('open ' . $url))->run();
+      $cmd = 'open ' . $url;
     }
-    $io->getErrorStyle()
-      ->error('No suitable browser opening command found, open yourself: ' . $url);
+
+    if (empty($cmd)) {
+      $io->getErrorStyle()
+        ->error('No suitable browser opening command found, open yourself: ' . $url);
+      return;
+    }
+
+    if ($wait) {
+      $cmd = 'sleep ' . $wait . ' && ' . $cmd;
+    }
+
+    (new Process($cmd))->start();
+    return;
   }
 
   /**
@@ -170,12 +181,19 @@
   /**
    * Starts up a webserver with a running Drupal.
    *
+   * @param strng $host
+   *   The hostname of the webserver.
+   * @param int $port
+   *   The port to start the webserver on.
    * @param \Drupal\Core\DrupalKernelInterface $kernel
    *   The Drupal kernel.
    * @param \Symfony\Component\Console\Input\InputInterface $input
    *   The input.
    * @param \Symfony\Component\Console\Style\SymfonyStyle $io
    *   The IO.
+   *
+   * @return int
+   *   The exit status of the PHP in-built webserver command.
    */
   protected function start($host, $port, DrupalKernelInterface $kernel, InputInterface $input, SymfonyStyle $io) {
     $finder = new PhpExecutableFinder();
@@ -184,44 +202,34 @@
       throw new \RuntimeException('Unable to find the PHP binary.');
     }
 
-    $process = new Process([
-      $binary,
-      '-S',
-      $host . ':' . $port,
-      '.ht.router.php',
-    ], $kernel->getAppRoot(), [], NULL, NULL);
-
-    // If TTY is available and the --show-server-output is used, run the command
-    // using it so that the full colored output from PHP's in-built webserver is
-    // displayed.
-    if (DIRECTORY_SEPARATOR !== '\\' && $input->getOption('show-server-output')) {
-      $process->setTty(TRUE);
-      $process->start();
-    }
-    else {
-      $io->writeln("Starting webserver on http://$host:$port");
-      $io->writeln('Press Ctrl-C to quit.');
-      $output = NULL;
-      if ($input->getOption('show-server-output')) {
-        $output = function ($type, $buffer) {
-          echo $buffer;
-        };
-      }
-      $process->start($output);
-    }
-
+    $io->writeln("<info>Drupal development server started:</info> <http://{$host}:{$port}>");
     $one_time_login = "http://$host:$port{$this->getOneTimeLoginUrl()}/login";
-    if ($input->getOption('suppress-login')) {
-      $io->writeln('One time login url: ' . $one_time_login);
-    }
-    else {
-      // Should we redirect to the front page?
-      if ($this->openBrowser("$one_time_login?destination=" . urlencode("/"), $io) === 1) {
+    $io->writeln("<info>One time login url:</info> <$one_time_login>");
+    $io->writeln('Press Ctrl-C to quit.');
+
+    if (!$input->getOption('suppress-login')) {
+      // @todo Fix redirect to the front page.
+      if ($this->openBrowser("$one_time_login?destination=" . urlencode("/"), $io, 2) === 1) {
         $io->error('Error while opening up a one time login URL');
       }
     }
-    // Hang until the process is killed.
-    $process->wait();
+
+    $command = sprintf('%s -S %s:%s %s',
+      ProcessUtils::escapeArgument($binary),
+      $host,
+      $port,
+      '.ht.router.php'
+    );
+
+    // Write a blank line so that server output and the useful information are
+    // visually separated.
+    $io->writeln('');
+    $cwd = getcwd();
+    chdir($kernel->getAppRoot());
+    // To support Windows we can't open the server in another process.
+    passthru($command, $status);
+    chdir($cwd);
+    return $status;
   }
 
   /**
diff -u b/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php b/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php
--- b/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php
+++ b/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php
@@ -53,6 +53,9 @@
     $this->php = $php_executable_finder->find();
     $this->root = dirname(dirname(substr(__DIR__, 0, -strlen(__NAMESPACE__))));
     chdir($this->root);
+    if (!is_writable("{$this->root}/sites/simpletest")) {
+      $this->markTestSkipped('This test requires a writable sites/simpletest directory');
+    }
     // Get a lock and a valid site path.
     $this->testDb = new TestDatabase();
   }