diff --git a/src/Illuminate/Console/Application.php b/src/Illuminate/Console/Application.php
index 98536ce41eec..bdc9575744f5 100755
--- a/src/Illuminate/Console/Application.php
+++ b/src/Illuminate/Console/Application.php
@@ -206,9 +206,9 @@ public function output()
      * Add a command to the console.
      *
      * @param  \Symfony\Component\Console\Command\Command  $command
-     * @return \Symfony\Component\Console\Command\Command
+     * @return \Symfony\Component\Console\Command\Command|null
      */
-    public function add(SymfonyCommand $command)
+    public function add(SymfonyCommand $command):?\Symfony\Component\Console\Command\Command
     {
         if ($command instanceof Command) {
             $command->setLaravel($this->laravel);
diff --git a/src/Illuminate/Console/Command.php b/src/Illuminate/Console/Command.php
index 7e1b3a1ff6ed..4f93aaaae3fa 100755
--- a/src/Illuminate/Console/Command.php
+++ b/src/Illuminate/Console/Command.php
@@ -192,7 +192,7 @@ public function run(InputInterface $input, OutputInterface $output): int
      * @param  \Symfony\Component\Console\Output\OutputInterface  $output
      * @return int
      */
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output):int
     {
         if ($this instanceof Isolatable && $this->option('isolated') !== false &&
             ! $this->commandIsolationMutex()->create($this)) {
diff --git a/src/Illuminate/Console/OutputStyle.php b/src/Illuminate/Console/OutputStyle.php
index cbfc257220e7..01c506ff9398 100644
--- a/src/Illuminate/Console/OutputStyle.php
+++ b/src/Illuminate/Console/OutputStyle.php
@@ -64,7 +64,7 @@ public function askQuestion(Question $question): mixed
     /**
      * {@inheritdoc}
      */
-    public function write(string|iterable $messages, bool $newline = false, int $options = 0)
+    public function write(string|iterable $messages, bool $newline = false, int $options = 0):void
     {
         $this->newLinesWritten = $this->trailingNewLineCount($messages) + (int) $newline;
         $this->newLineWritten = $this->newLinesWritten > 0;
@@ -77,7 +77,7 @@ public function write(string|iterable $messages, bool $newline = false, int $opt
      *
      * @return void
      */
-    public function writeln(string|iterable $messages, int $type = self::OUTPUT_NORMAL)
+    public function writeln(string|iterable $messages, int $type = self::OUTPUT_NORMAL):void
     {
         $this->newLinesWritten = $this->trailingNewLineCount($messages) + 1;
         $this->newLineWritten = true;
@@ -90,7 +90,7 @@ public function writeln(string|iterable $messages, int $type = self::OUTPUT_NORM
      *
      * @return void
      */
-    public function newLine(int $count = 1)
+    public function newLine(int $count = 1):void
     {
         $this->newLinesWritten += $count;
         $this->newLineWritten = $this->newLinesWritten > 0;
diff --git a/src/Illuminate/Console/QuestionHelper.php b/src/Illuminate/Console/QuestionHelper.php
index 43b4cf8296c1..76c9d1093aca 100644
--- a/src/Illuminate/Console/QuestionHelper.php
+++ b/src/Illuminate/Console/QuestionHelper.php
@@ -17,7 +17,7 @@ class QuestionHelper extends SymfonyQuestionHelper
      *
      * @return void
      */
-    protected function writePrompt(OutputInterface $output, Question $question)
+    protected function writePrompt(OutputInterface $output, Question $question):void
     {
         $text = OutputFormatter::escapeTrailingBackslash($question->getQuestion());
 
diff --git a/src/Illuminate/Foundation/Console/ClosureCommand.php b/src/Illuminate/Foundation/Console/ClosureCommand.php
index 4cd54e8e4a79..a75da68aeea9 100644
--- a/src/Illuminate/Foundation/Console/ClosureCommand.php
+++ b/src/Illuminate/Foundation/Console/ClosureCommand.php
@@ -39,7 +39,7 @@ public function __construct($signature, Closure $callback)
      * @param  \Symfony\Component\Console\Output\OutputInterface  $output
      * @return int
      */
-    protected function execute(InputInterface $input, OutputInterface $output)
+    protected function execute(InputInterface $input, OutputInterface $output):int
     {
         $inputs = array_merge($input->getArguments(), $input->getOptions());
 
diff --git a/src/Illuminate/Testing/ParallelConsoleOutput.php b/src/Illuminate/Testing/ParallelConsoleOutput.php
index 91008dde890d..c71515b85932 100644
--- a/src/Illuminate/Testing/ParallelConsoleOutput.php
+++ b/src/Illuminate/Testing/ParallelConsoleOutput.php
@@ -49,7 +49,7 @@ public function __construct($output)
      * @param  int  $options
      * @return void
      */
-    public function write($messages, bool $newline = false, int $options = 0)
+    public function write($messages, bool $newline = false, int $options = 0):void
     {
         $messages = collect($messages)->filter(function ($message) {
             return ! Str::contains($message, $this->ignore);