diff --git a/core/lib/Drupal/Core/Command/ServerCommand.php b/core/lib/Drupal/Core/Command/ServerCommand.php
index f60325e8feb6..6c153241b2d9 100644
--- a/core/lib/Drupal/Core/Command/ServerCommand.php
+++ b/core/lib/Drupal/Core/Command/ServerCommand.php
@@ -148,8 +148,8 @@ class ServerCommand extends Command {
       $url = escapeshellarg($url);
     }
 
-    $is_linux = (new Process('which xdg-open'))->run();
-    $is_osx = (new Process('which open'))->run();
+    $is_linux = Process::fromShellCommandline('which xdg-open')->run();
+    $is_osx = Process::fromShellCommandline('which open')->run();
     if ($is_linux === 0) {
       $cmd = 'xdg-open ' . $url;
     }
diff --git a/core/tests/Drupal/BuildTests/Framework/BuildTestBase.php b/core/tests/Drupal/BuildTests/Framework/BuildTestBase.php
index 88e38fddf6f1..f484585dcbe4 100644
--- a/core/tests/Drupal/BuildTests/Framework/BuildTestBase.php
+++ b/core/tests/Drupal/BuildTests/Framework/BuildTestBase.php
@@ -311,7 +311,7 @@ abstract class BuildTestBase extends TestCase {
    * @return \Symfony\Component\Process\Process
    */
   public function executeCommand($command_line, $working_dir = NULL) {
-    $this->commandProcess = new Process($command_line);
+    $this->commandProcess = Process::fromShellCommandline($command_line);
     $this->commandProcess->setWorkingDirectory($this->getWorkingPath($working_dir))
       ->setTimeout(300)
       ->setIdleTimeout(300);
diff --git a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php
index c0ff98edcbc9..be29f84561ca 100644
--- a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php
+++ b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php
@@ -23,7 +23,7 @@ trait ExecTrait {
    *   Standard output from the command
    */
   protected function mustExec($cmd, $cwd, array $env = []) {
-    $process = new Process($cmd, $cwd, $env + ['PATH' => getenv('PATH'), 'HOME' => getenv('HOME')]);
+    $process = Process::fromShellCommandline($cmd, $cwd, $env + ['PATH' => getenv('PATH'), 'HOME' => getenv('HOME')]);
     $process->setTimeout(300)->setIdleTimeout(300)->run();
     $exitCode = $process->getExitCode();
     if (0 != $exitCode) {
diff --git a/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php b/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php
index 135302f6c64c..59a22c3bc993 100644
--- a/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php
+++ b/core/tests/Drupal/Tests/Core/Test/PhpUnitCliTest.php
@@ -20,7 +20,7 @@ class PhpUnitCliTest extends UnitTestCase {
     // duplicate namespace errors or so forth. This keeps us from committing
     // tests which don't break under run-tests.sh, but do break under the
     // phpunit test runner tool.
-    $process = new Process('vendor/bin/phpunit --configuration core --verbose --list-tests');
+    $process = Process::fromShellCommandline('vendor/bin/phpunit --configuration core --verbose --list-tests');
     $process->setWorkingDirectory($this->root)
       ->setTimeout(300)
       ->setIdleTimeout(300);