diff --git a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php
index 972ac31e7b51..c0ff98edcbc9 100644
--- a/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php
+++ b/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/ExecTrait.php
@@ -24,7 +24,6 @@ trait ExecTrait {
    */
   protected function mustExec($cmd, $cwd, array $env = []) {
     $process = new Process($cmd, $cwd, $env + ['PATH' => getenv('PATH'), 'HOME' => getenv('HOME')]);
-    $process->inheritEnvironmentVariables();
     $process->setTimeout(300)->setIdleTimeout(300)->run();
     $exitCode = $process->getExitCode();
     if (0 != $exitCode) {
diff --git a/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php b/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php
index 75bbf188dd19..3d0c0373619f 100644
--- a/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php
+++ b/core/tests/Drupal/Tests/Core/Command/QuickStartTest.php
@@ -105,7 +105,6 @@ class QuickStartTest extends TestCase {
       '--suppress-login',
     ];
     $process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $process->inheritEnvironmentVariables();
     $process->setTimeout(500);
     $process->start();
     $guzzle = new Client();
@@ -158,7 +157,6 @@ class QuickStartTest extends TestCase {
       '--suppress-login',
     ];
     $process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $process->inheritEnvironmentVariables();
     $process->setTimeout(500);
     $process->start();
     while ($process->isRunning()) {
@@ -195,7 +193,6 @@ class QuickStartTest extends TestCase {
       "--site-name='Test site {$this->testDb->getDatabasePrefix()}'",
     ];
     $install_process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $install_process->inheritEnvironmentVariables();
     $install_process->setTimeout(500);
     $result = $install_process->run();
     // The progress bar uses STDERR to write messages.
@@ -210,7 +207,6 @@ class QuickStartTest extends TestCase {
       '--suppress-login',
     ];
     $server_process = new Process($server_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $server_process->inheritEnvironmentVariables();
     $server_process->start();
     $guzzle = new Client();
     $port = FALSE;
@@ -249,7 +245,6 @@ class QuickStartTest extends TestCase {
       "--site-name='Test another site {$this->testDb->getDatabasePrefix()}'",
     ];
     $install_process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $install_process->inheritEnvironmentVariables();
     $install_process->setTimeout(500);
     $result = $install_process->run();
     $this->assertStringContainsString('Drupal is already installed.', $install_process->getOutput());
@@ -278,7 +273,6 @@ class QuickStartTest extends TestCase {
       "--site-name='Test site {$this->testDb->getDatabasePrefix()}' --suppress-login",
     ];
     $process = new Process($install_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $process->inheritEnvironmentVariables();
     $process->run();
     $this->assertStringContainsString('\'umami\' is not a valid install profile. Did you mean \'demo_umami\'?', $process->getErrorOutput());
   }
@@ -294,7 +288,6 @@ class QuickStartTest extends TestCase {
       '--suppress-login',
     ];
     $server_process = new Process($server_command, NULL, ['DRUPAL_DEV_SITE_PATH' => $this->testDb->getTestSitePath()]);
-    $server_process->inheritEnvironmentVariables();
     $server_process->run();
     $this->assertStringContainsString('No installation found. Use the \'install\' command.', $server_process->getErrorOutput());
   }
diff --git a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
index b3a7b38ec07d..8135e77995bc 100644
--- a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
+++ b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
@@ -160,7 +160,6 @@ trait DeprecationListenerTrait {
       'The "Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::dispatch()" method will require a new "string|null $eventName" argument in the next major version of its parent class "Symfony\Contracts\EventDispatcher\EventDispatcherInterface", not defining it is deprecated.',
       'Passing a command as string when creating a "Symfony\Component\Process\Process" instance is deprecated since Symfony 4.2, pass it as an array of its arguments instead, or use the "Process::fromShellCommandline()" constructor if you need features provided by the shell.',
       'Passing arguments to "Symfony\Component\HttpFoundation\Request::isMethodSafe()" has been deprecated since Symfony 4.4; use "Symfony\Component\HttpFoundation\Request::isMethodCacheable()" to check if the method is cacheable instead.',
-      'The "Symfony\Component\Process\Process::inheritEnvironmentVariables()" method is deprecated since Symfony 4.4, env variables are always inherited.',
       'The "Symfony\Component\Debug\BufferingLogger" class is deprecated since Symfony 4.4, use "Symfony\Component\ErrorHandler\BufferingLogger" instead.',
       // The following deprecation is listed for Twig 2 compatibility when unit
       // testing using \Symfony\Component\ErrorHandler\DebugClassLoader.