diff --git a/Input/ArgvInput.php b/Input/ArgvInput.php
index fe25b861a..d7c57f688 100644
--- a/Input/ArgvInput.php
+++ b/Input/ArgvInput.php
@@ -179,7 +179,7 @@ private function parseArgument(string $token): void
         } else {
             $all = $this->definition->getArguments();
             $symfonyCommandName = null;
-            if (($inputArgument = $all[$key = array_key_first($all)] ?? null) && 'command' === $inputArgument->getName()) {
+            if (($inputArgument = $all[$key = array_key_first($all) ?? ''] ?? null) && 'command' === $inputArgument->getName()) {
                 $symfonyCommandName = $this->arguments['command'] ?? null;
                 unset($all[$key]);
             }
diff --git a/Question/ChoiceQuestion.php b/Question/ChoiceQuestion.php
index 36c240d37..4fc296d9f 100644
--- a/Question/ChoiceQuestion.php
+++ b/Question/ChoiceQuestion.php
@@ -25,9 +25,9 @@ class ChoiceQuestion extends Question
     private string $errorMessage = 'Value "%s" is invalid';
 
     /**
-     * @param string                     $question The question to ask to the user
-     * @param array                      $choices  The list of available choices
-     * @param string|bool|int|float|null $default  The default answer to return
+     * @param string                       $question The question to ask to the user
+     * @param array<string|bool|int|float> $choices  The list of available choices
+     * @param string|bool|int|float|null   $default  The default answer to return
      */
     public function __construct(
         string $question,
@@ -45,7 +45,7 @@ public function __construct(
     }
 
     /**
-     * Returns available choices.
+     * @return array<string|bool|int|float>
      */
     public function getChoices(): array
     {
diff --git a/Resources/completion.bash b/Resources/completion.bash
index 64c6a338f..2befe76cb 100644
--- a/Resources/completion.bash
+++ b/Resources/completion.bash
@@ -37,7 +37,7 @@ _sf_{{ COMMAND_NAME }}() {
 
     local completecmd=("$sf_cmd" "_complete" "--no-interaction" "-sbash" "-c$cword" "-a{{ VERSION }}")
     for w in ${words[@]}; do
-        w=$(printf -- '%b' "$w")
+        w="${w//\\\\/\\}"
         # remove quotes from typed values
         quote="${w:0:1}"
         if [ "$quote" == \' ]; then
diff --git a/Tester/TesterTrait.php b/Tester/TesterTrait.php
index 127556d1d..238c7b7eb 100644
--- a/Tester/TesterTrait.php
+++ b/Tester/TesterTrait.php
@@ -168,10 +168,10 @@ private static function createStream(array $inputs)
         $stream = fopen('php://memory', 'r+', false);
 
         foreach ($inputs as $input) {
-            fwrite($stream, $input.\PHP_EOL);
+            fwrite($stream, $input);
 
-            if (str_contains($input, \PHP_EOL)) {
-                fwrite($stream, "\x4");
+            if (!str_ends_with($input, "\x4")) {
+                fwrite($stream, \PHP_EOL);
             }
         }
 
diff --git a/Tests/Tester/CommandTesterTest.php b/Tests/Tester/CommandTesterTest.php
index cfdebe4d8..d36042038 100644
--- a/Tests/Tester/CommandTesterTest.php
+++ b/Tests/Tester/CommandTesterTest.php
@@ -139,6 +139,32 @@ public function testCommandWithInputs()
         $this->assertEquals(implode('', $questions), $tester->getDisplay(true));
     }
 
+    public function testCommandWithMultilineInputs()
+    {
+        $question = 'What is your address?';
+
+        $command = new Command('foo');
+        $command->setHelperSet(new HelperSet([new QuestionHelper()]));
+        $command->setCode(function (InputInterface $input, OutputInterface $output) use ($question, $command): int {
+            $output->write($command->getHelper('question')->ask($input, $output, (new Question($question))->setMultiline(true)));
+            $output->write(stream_get_contents($input->getStream()));
+
+            return 0;
+        });
+
+        $tester = new CommandTester($command);
+
+        $address = <<<ADDRESS
+            31 Spooner Street
+            Quahog
+            ADDRESS;
+        $tester->setInputs([$address."\x04", $address]);
+        $tester->execute([]);
+
+        $tester->assertCommandIsSuccessful();
+        $this->assertSame($question.$address.$address.\PHP_EOL, $tester->getDisplay());
+    }
+
     public function testCommandWithDefaultInputs()
     {
         $questions = [