diff --git a/src/Console/OpenFileDescriptorLimiter.php b/src/Console/OpenFileDescriptorLimiter.php
index ed888b809..bded877e8 100644
--- a/src/Console/OpenFileDescriptorLimiter.php
+++ b/src/Console/OpenFileDescriptorLimiter.php
@@ -16,6 +16,7 @@
 
 use Closure;
 use Fidry\Console\IO;
+use KevinGH\Box\Noop;
 use KevinGH\Box\NotInstantiable;
 use Symfony\Component\Console\Output\OutputInterface;
 use function function_exists;
@@ -50,15 +51,14 @@ public static function bumpLimit(int $count, IO $io): Closure
                 OutputInterface::VERBOSITY_DEBUG,
             );
 
-            // TODO: loverage noop
-            return static function (): void {};
+            return Noop::create();
         }
 
         $softLimit = posix_getrlimit()['soft openfiles'];
         $hardLimit = posix_getrlimit()['hard openfiles'];
 
         if ($softLimit >= $count) {
-            return static function (): void {};
+            return Noop::create();
         }
 
         $io->writeln(
diff --git a/src/Console/PharInfoRenderer.php b/src/Console/PharInfoRenderer.php
index d895cc85c..14559216c 100644
--- a/src/Console/PharInfoRenderer.php
+++ b/src/Console/PharInfoRenderer.php
@@ -17,6 +17,7 @@
 use Closure;
 use DateTimeImmutable;
 use Fidry\Console\IO;
+use KevinGH\Box\Noop;
 use KevinGH\Box\NotInstantiable;
 use KevinGH\Box\Phar\CompressionAlgorithm;
 use KevinGH\Box\Phar\PharInfo;
@@ -36,7 +37,6 @@
 use function is_array;
 use function KevinGH\Box\format_size;
 use function KevinGH\Box\format_size as format_size1;
-use function KevinGH\Box\noop;
 use function key;
 use function preg_match;
 use function round;
@@ -61,7 +61,7 @@ public static function renderShortSummary(
         IO $io,
         ?Closure $separator = null,
     ): void {
-        $separator ??= noop();
+        $separator ??= Noop::create();
 
         $methods = [
             self::renderCompression(...),
diff --git a/src/Noop.php b/src/Noop.php
new file mode 100644
index 000000000..3a7a12ebd
--- /dev/null
+++ b/src/Noop.php
@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the box project.
+ *
+ * (c) Kevin Herrera <kevin@herrera.io>
+ *     Théo Fidry <theo.fidry@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace KevinGH\Box;
+
+use Closure;
+
+/**
+ * @private
+ */
+final class Noop
+{
+    use NotInstantiable;
+
+    /**
+     * @var Closure():void
+     */
+    private static Closure $noop;
+
+    /**
+     * @return Closure():void
+     */
+    public static function create(): Closure
+    {
+        if (!isset(self::$noop)) {
+            self::$noop = static function (): void {};
+        }
+
+        return self::$noop;
+    }
+}
diff --git a/src/functions.php b/src/functions.php
index 58d4ef84f..fdebab218 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -14,7 +14,6 @@
 
 namespace KevinGH\Box;
 
-use Closure;
 use Composer\InstalledVersions;
 use ErrorException;
 use Fidry\Console\IO;
@@ -212,14 +211,6 @@ function check_php_settings(IO $io): void
     ))->check();
 }
 
-/**
- * @private
- */
-function noop(): Closure
-{
-    return static function (): void {};
-}
-
 /**
  * Converts errors to exceptions.
  *
diff --git a/tests/BoxTest.php b/tests/BoxTest.php
index 17fd294b4..6a9ec29e4 100644
--- a/tests/BoxTest.php
+++ b/tests/BoxTest.php
@@ -110,7 +110,7 @@ public function test_it_cannot_start_the_buffering_if_it_is_already_started(): v
     public function test_it_cannot_end_the_buffering_if_it_is_already_ended(): void
     {
         try {
-            $this->box->endBuffering(noop());
+            $this->box->endBuffering(Noop::create());
 
             self::fail('Expected exception to be thrown.');
         } catch (InvalidArgumentException $exception) {
@@ -121,10 +121,10 @@ public function test_it_cannot_end_the_buffering_if_it_is_already_ended(): void
         }
 
         $this->box->startBuffering();
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         try {
-            $this->box->endBuffering(noop());
+            $this->box->endBuffering(Noop::create());
 
             self::fail('Expected exception to be thrown.');
         } catch (InvalidArgumentException $exception) {
@@ -144,7 +144,7 @@ public function test_it_can_add_a_file_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFile($file);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -159,7 +159,7 @@ public function test_it_can_add_a_file_to_the_phar(): void
     public function test_it_ensures_a_phar_cannot_be_empty(): void
     {
         $this->box->startBuffering();
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedPharPath = 'phar://test.phar/.box_empty';
 
@@ -173,7 +173,7 @@ public function test_it_can_add_a_file_to_the_phar_in_a_new_buffering_process_do
 
         $this->box->startBuffering();
         $this->box->addFile($file0, $file0Contents);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $file0Contents;
         $expectedPharPath = 'phar://test.phar/'.$file0;
@@ -189,7 +189,7 @@ public function test_it_can_add_a_file_to_the_phar_in_a_new_buffering_process_do
 
         $this->box->startBuffering();
         $this->box->addFile($file1, $file1Contents);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $file1Contents;
         $expectedPharPath = 'phar://test.phar/'.$file1;
@@ -227,7 +227,7 @@ public function test_it_can_add_a_non_existent_file_with_contents_to_the_phar():
 
         $this->box->startBuffering();
         $this->box->addFile($file, $contents);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -248,7 +248,7 @@ public function test_it_can_add_an_existent_file_with_contents_to_the_phar(): vo
 
         $this->box->startBuffering();
         $this->box->addFile($file, $contents);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -267,7 +267,7 @@ public function test_it_can_add_a_non_existent_bin_file_with_contents_to_the_pha
 
         $this->box->startBuffering();
         $this->box->addFile($file, $contents, true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -288,7 +288,7 @@ public function test_it_can_add_an_existent_bin_file_with_contents_to_the_phar()
 
         $this->box->startBuffering();
         $this->box->addFile($file, $contents, true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -310,7 +310,7 @@ public function test_it_can_add_a_file_with_absolute_path_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFile($file);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$relativePath;
@@ -341,7 +341,7 @@ public function test_it_can_add_a_file_with_a_local_path_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFile($file);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$localPath;
@@ -364,7 +364,7 @@ public function test_it_can_add_a_binary_file_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFile($file, null, true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -395,7 +395,7 @@ public function test_it_can_add_a_binary_file_with_a_local_path_to_the_phar(): v
 
         $this->box->startBuffering();
         $this->box->addFile($file, null, true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $contents;
         $expectedPharPath = 'phar://test.phar/'.$localPath;
@@ -440,7 +440,7 @@ public function test_it_compacts_the_file_content_and_replace_placeholders_befor
 
         $this->box->startBuffering();
         $this->box->addFile($file);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $secondCompactorOutput;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -479,7 +479,7 @@ public function test_it_maps_the_file_before_adding_it_to_the_phar(): void
 
             $this->box->startBuffering();
             $local = $this->box->addFile($file);
-            $this->box->endBuffering(noop());
+            $this->box->endBuffering(Noop::create());
 
             self::assertSame($expectedLocal, $local);
 
@@ -525,7 +525,7 @@ public function test_it_cannot_add_an_unreadable_file(): void
         try {
             $this->box->startBuffering();
             $this->box->addFile($file);
-            $this->box->endBuffering(noop());
+            $this->box->endBuffering(Noop::create());
 
             self::fail('Expected exception to be thrown.');
         } catch (InvalidArgumentException $exception) {
@@ -568,7 +568,7 @@ public function test_it_compacts_the_contents_before_adding_it_to_the_phar(): vo
 
         $this->box->startBuffering();
         $this->box->addFile($file, $contents);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expectedContents = $secondCompactorOutput;
         $expectedPharPath = 'phar://test.phar/'.$file;
@@ -596,7 +596,7 @@ public function test_it_can_add_files_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFiles(['foo', 'bar'], false);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $contents) {
             $expectedContents = $contents;
@@ -643,7 +643,7 @@ public function test_it_can_add_files_with_absolute_path_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFiles([$f1, $f2], false);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $contents) {
             $expectedContents = $contents;
@@ -685,7 +685,7 @@ public function test_it_can_add_files_with_a_local_path_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFiles(['foo', 'bar'], false);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $item) {
             $expectedContents = $item['contents'];
@@ -781,7 +781,7 @@ public function test_it_can_remove_the_composer_files(): void
 
         $this->box->startBuffering();
         $this->box->addFiles(array_keys($files), true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $contents) {
             self::assertFileExists('phar://test.phar/'.$file);
@@ -814,7 +814,7 @@ public function test_it_can_remove_the_composer_files_with_a_custom_vendor_direc
 
         $this->box->startBuffering();
         $this->box->addFiles(array_keys($files), true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $contents) {
             self::assertFileExists('phar://test.phar/'.$file);
@@ -850,7 +850,7 @@ public function test_it_can_remove_the_composer_files_mapped_with_a_different_pa
 
         $this->box->startBuffering();
         $this->box->addFiles(array_keys($files), true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $contents) {
             self::assertFileExists('phar://test.phar/lib/'.$file);
@@ -919,7 +919,7 @@ public function test_it_can_add_binary_files_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFiles(['foo', 'bar'], true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $contents) {
             $expectedContents = $contents;
@@ -961,7 +961,7 @@ public function test_it_can_add_binary_files_with_a_local_path_to_the_phar(): vo
 
         $this->box->startBuffering();
         $this->box->addFiles(['foo', 'bar'], true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $file => $item) {
             $expectedContents = $item['contents'];
@@ -998,7 +998,7 @@ public function test_it_compacts_the_files_contents_and_replace_placeholders_bef
 
         $this->box->startBuffering();
         $this->box->addFiles(array_keys($files), false);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         $expected = [
             'foo' => 'foo_value',
@@ -1041,7 +1041,7 @@ public function test_it_maps_the_files_before_adding_it_to_the_phar(): void
 
         $this->box->startBuffering();
         $this->box->addFiles(array_keys($files), true);
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         foreach ($files as $expectedLocal) {
             self::assertFileExists(
@@ -1365,7 +1365,7 @@ public function test_it_compresses_all_the_files_with_the_given_algorithm(): voi
                 PHP,
         );
 
-        $this->box->endBuffering(noop());
+        $this->box->endBuffering(Noop::create());
 
         self::assertCount(2, $this->box);