diff --git a/Output/ConsoleOutput.php b/Output/ConsoleOutput.php
index 2ad3dbcf3..0aab633c0 100644
--- a/Output/ConsoleOutput.php
+++ b/Output/ConsoleOutput.php
@@ -130,12 +130,27 @@ private function isRunningOS400(): bool
      */
     private function openOutputStream()
     {
+        static $stdout;
+
+        if ($stdout) {
+            return $stdout;
+        }
+
         if (!$this->hasStdoutSupport()) {
-            return fopen('php://output', 'w');
+            return $stdout = fopen('php://output', 'w');
         }
 
         // Use STDOUT when possible to prevent from opening too many file descriptors
-        return \defined('STDOUT') ? \STDOUT : (@fopen('php://stdout', 'w') ?: fopen('php://output', 'w'));
+        if (!\defined('STDOUT')) {
+            return $stdout = @fopen('php://stdout', 'w') ?: fopen('php://output', 'w');
+        }
+
+        // On Windows, STDOUT is opened in text mode; reopen in binary mode to prevent \n to \r\n conversion
+        if ('\\' === \DIRECTORY_SEPARATOR) {
+            return $stdout = @fopen('php://stdout', 'w') ?: \STDOUT;
+        }
+
+        return $stdout = \STDOUT;
     }
 
     /**
@@ -143,11 +158,26 @@ private function openOutputStream()
      */
     private function openErrorStream()
     {
+        static $stderr;
+
+        if ($stderr) {
+            return $stderr;
+        }
+
         if (!$this->hasStderrSupport()) {
-            return fopen('php://output', 'w');
+            return $stderr = fopen('php://output', 'w');
         }
 
         // Use STDERR when possible to prevent from opening too many file descriptors
-        return \defined('STDERR') ? \STDERR : (@fopen('php://stderr', 'w') ?: fopen('php://output', 'w'));
+        if (!\defined('STDERR')) {
+            return $stderr = @fopen('php://stderr', 'w') ?: fopen('php://output', 'w');
+        }
+
+        // On Windows, STDERR is opened in text mode; reopen in binary mode to prevent \n → \r\n conversion
+        if ('\\' === \DIRECTORY_SEPARATOR) {
+            return $stderr = @fopen('php://stderr', 'w') ?: \STDERR;
+        }
+
+        return $stderr ??= \STDERR;
     }
 }
diff --git a/Tester/ApplicationTester.php b/Tester/ApplicationTester.php
index a6dc8e1ce..5b1aeab4c 100644
--- a/Tester/ApplicationTester.php
+++ b/Tester/ApplicationTester.php
@@ -58,6 +58,28 @@ public function run(array $input, array $options = []): int
 
         $this->initOutput($options);
 
-        return $this->statusCode = $this->application->run($this->input, $this->output);
+        // Temporarily clear SHELL_VERBOSITY to prevent Application::configureIO
+        // from overriding the interactive and verbosity settings set above
+        $prevShellVerbosity = [getenv('SHELL_VERBOSITY'), $_ENV['SHELL_VERBOSITY'] ?? false, $_SERVER['SHELL_VERBOSITY'] ?? false];
+        if (\function_exists('putenv')) {
+            @putenv('SHELL_VERBOSITY');
+        }
+        unset($_ENV['SHELL_VERBOSITY'], $_SERVER['SHELL_VERBOSITY']);
+
+        try {
+            return $this->statusCode = $this->application->run($this->input, $this->output);
+        } finally {
+            if (false !== $prevShellVerbosity[0]) {
+                if (\function_exists('putenv')) {
+                    @putenv('SHELL_VERBOSITY='.$prevShellVerbosity[0]);
+                }
+            }
+            if (false !== $prevShellVerbosity[1]) {
+                $_ENV['SHELL_VERBOSITY'] = $prevShellVerbosity[1];
+            }
+            if (false !== $prevShellVerbosity[2]) {
+                $_SERVER['SHELL_VERBOSITY'] = $prevShellVerbosity[2];
+            }
+        }
     }
 }
diff --git a/Tests/Fixtures/binary_output.php b/Tests/Fixtures/binary_output.php
new file mode 100644
index 000000000..2720e9734
--- /dev/null
+++ b/Tests/Fixtures/binary_output.php
@@ -0,0 +1,13 @@
+<?php
+
+$vendor = __DIR__;
+while (!file_exists($vendor.'/vendor')) {
+    $vendor = \dirname($vendor);
+}
+require $vendor.'/vendor/autoload.php';
+
+use Symfony\Component\Console\Output\ConsoleOutput;
+use Symfony\Component\Console\Output\OutputInterface;
+
+$output = new ConsoleOutput();
+$output->write("HELLO\nWORLD", false, OutputInterface::OUTPUT_RAW);
diff --git a/Tests/Output/StreamOutputTest.php b/Tests/Output/StreamOutputTest.php
index f8c9913bc..618c44f18 100644
--- a/Tests/Output/StreamOutputTest.php
+++ b/Tests/Output/StreamOutputTest.php
@@ -14,6 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Output\Output;
 use Symfony\Component\Console\Output\StreamOutput;
+use Symfony\Component\Process\Process;
 
 class StreamOutputTest extends TestCase
 {
@@ -65,4 +66,12 @@ public function testDoWriteOnFailure()
         rewind($output->getStream());
         $this->assertEquals('', stream_get_contents($output->getStream()));
     }
+
+    public function testRawOutputPreservesNewlinesInContent()
+    {
+        $process = new Process(['php', __DIR__.'/../Fixtures/binary_output.php']);
+        $process->run();
+
+        $this->assertSame("HELLO\nWORLD", $process->getOutput(), 'Raw output must not convert LF in binary content');
+    }
 }
diff --git a/Tests/Tester/ApplicationTesterTest.php b/Tests/Tester/ApplicationTesterTest.php
index 843f2eac7..24fc392bd 100644
--- a/Tests/Tester/ApplicationTesterTest.php
+++ b/Tests/Tester/ApplicationTesterTest.php
@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Console\Tests\Tester;
 
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Console\Application;
 use Symfony\Component\Console\Helper\QuestionHelper;
@@ -91,6 +92,48 @@ public function testGetStatusCode()
         $this->tester->assertCommandIsSuccessful('->getStatusCode() returns the status code');
     }
 
+    #[DataProvider('provideShellVerbositySources')]
+    public function testShellVerbosityDoesNotOverrideInteractiveAndVerbosity(callable $setShellVerbosity, callable $cleanUp)
+    {
+        $setShellVerbosity();
+
+        try {
+            $application = new Application();
+            $application->setAutoExit(false);
+            $application->register('foo')
+                ->setCode(static function (InputInterface $input, OutputInterface $output): int {
+                    $output->writeln('foo');
+
+                    return 0;
+                })
+            ;
+
+            $tester = new ApplicationTester($application);
+            $tester->run(['command' => 'foo'], ['interactive' => true]);
+
+            $this->assertTrue($tester->getInput()->isInteractive());
+            $this->assertSame('foo'.\PHP_EOL, $tester->getDisplay());
+        } finally {
+            $cleanUp();
+        }
+    }
+
+    public static function provideShellVerbositySources(): iterable
+    {
+        yield 'putenv' => [
+            static function () { putenv('SHELL_VERBOSITY=-1'); },
+            static function () { putenv('SHELL_VERBOSITY'); },
+        ];
+        yield '$_ENV' => [
+            static function () { $_ENV['SHELL_VERBOSITY'] = '-1'; },
+            static function () { unset($_ENV['SHELL_VERBOSITY']); },
+        ];
+        yield '$_SERVER' => [
+            static function () { $_SERVER['SHELL_VERBOSITY'] = '-1'; },
+            static function () { unset($_SERVER['SHELL_VERBOSITY']); },
+        ];
+    }
+
     public function testErrorOutput()
     {
         $application = new Application();