diff --git a/src/Internal/FulfilledPromise.php b/src/Internal/FulfilledPromise.php
index 78fadf31..1098201d 100644
--- a/src/Internal/FulfilledPromise.php
+++ b/src/Internal/FulfilledPromise.php
@@ -4,7 +4,6 @@
 
 use React\Promise\Promise;
 use React\Promise\PromiseInterface;
-use function React\Promise\enqueue;
 use function React\Promise\resolve;
 
 /**
@@ -30,13 +29,11 @@ public function then(callable $onFulfilled = null, callable $onRejected = null):
         }
 
         return new Promise(function (callable $resolve, callable $reject) use ($onFulfilled): void {
-            enqueue(function () use ($resolve, $reject, $onFulfilled): void {
-                try {
-                    $resolve($onFulfilled($this->value));
-                } catch (\Throwable $exception) {
-                    $reject($exception);
-                }
-            });
+            try {
+                $resolve($onFulfilled($this->value));
+            } catch (\Throwable $exception) {
+                $reject($exception);
+            }
         });
     }
 
diff --git a/src/Internal/Queue.php b/src/Internal/Queue.php
deleted file mode 100644
index 70f85817..00000000
--- a/src/Internal/Queue.php
+++ /dev/null
@@ -1,30 +0,0 @@
-<?php
-
-namespace React\Promise\Internal;
-
-/**
- * @internal
- */
-final class Queue
-{
-    private $queue = [];
-
-    public function enqueue(callable $task): void
-    {
-        if (1 === \array_push($this->queue, $task)) {
-            $this->drain();
-        }
-    }
-
-    private function drain(): void
-    {
-        for ($i = \key($this->queue); isset($this->queue[$i]); $i++) {
-            $task = $this->queue[$i];
-            unset($this->queue[$i]);
-
-            $task();
-        }
-
-        $this->queue = [];
-    }
-}
diff --git a/src/Internal/RejectedPromise.php b/src/Internal/RejectedPromise.php
index e5565989..aa126056 100644
--- a/src/Internal/RejectedPromise.php
+++ b/src/Internal/RejectedPromise.php
@@ -5,7 +5,6 @@
 use React\Promise\Promise;
 use React\Promise\PromiseInterface;
 use function React\Promise\_checkTypehint;
-use function React\Promise\enqueue;
 use function React\Promise\resolve;
 
 /**
@@ -27,13 +26,11 @@ public function then(callable $onFulfilled = null, callable $onRejected = null):
         }
 
         return new Promise(function (callable $resolve, callable $reject) use ($onRejected): void {
-            enqueue(function () use ($resolve, $reject, $onRejected): void {
-                try {
-                    $resolve($onRejected($this->reason));
-                } catch (\Throwable $exception) {
-                    $reject($exception);
-                }
-            });
+            try {
+                $resolve($onRejected($this->reason));
+            } catch (\Throwable $exception) {
+                $reject($exception);
+            }
         });
     }
 
diff --git a/src/functions.php b/src/functions.php
index 7517d6a2..b8eac495 100644
--- a/src/functions.php
+++ b/src/functions.php
@@ -205,20 +205,6 @@ function (\Throwable $reason) use ($i, &$reasons, &$toReject, $reject, &$continu
     }, $cancellationQueue);
 }
 
-/**
- * @internal
- */
-function enqueue(callable $task): void
-{
-    static $queue;
-
-    if (!$queue) {
-        $queue = new Internal\Queue();
-    }
-
-    $queue->enqueue($task);
-}
-
 /**
  * @internal
  */
diff --git a/tests/Internal/QueueTest.php b/tests/Internal/QueueTest.php
deleted file mode 100644
index 51ffedc1..00000000
--- a/tests/Internal/QueueTest.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-
-namespace React\Promise\Internal;
-
-use Exception;
-use React\Promise\TestCase;
-
-class QueueTest extends TestCase
-{
-    /** @test */
-    public function executesTasks()
-    {
-        $queue = new Queue();
-
-        $queue->enqueue($this->expectCallableOnce());
-        $queue->enqueue($this->expectCallableOnce());
-    }
-
-    /** @test */
-    public function executesNestedEnqueuedTasks()
-    {
-        $queue = new Queue();
-
-        $nested = $this->expectCallableOnce();
-
-        $task = function () use ($queue, $nested) {
-            $queue->enqueue($nested);
-        };
-
-        $queue->enqueue($task);
-    }
-
-    /**
-     * @test
-     * @requires PHP 8.1
-     */
-    public function executesFollowingTasksIfPriorTaskSuspendsFiber()
-    {
-        $queue = new Queue();
-
-        $fiber = new \Fiber(function () use ($queue) {
-            $queue->enqueue(function () {
-                \Fiber::suspend(2);
-            });
-            return 1;
-        });
-
-        $ret = $fiber->start();
-        $this->assertEquals(2, $ret);
-
-        $queue->enqueue($this->expectCallableOnce());
-    }
-
-    /**
-     * @test
-     */
-    public function rethrowsExceptionsThrownFromTasks()
-    {
-        $this->expectException(Exception::class);
-        $this->expectExceptionMessage('test');
-        $mock = $this->createCallableMock();
-        $mock
-            ->expects(self::once())
-            ->method('__invoke')
-            ->will(self::throwException(new Exception('test')));
-
-        $queue = new Queue();
-        $queue->enqueue($mock);
-    }
-}