diff --git a/tests/Examples/Transport/Receiver/CollectionReceiverTest.php b/tests/Examples/Transport/Receiver/CollectionReceiverTest.php
new file mode 100644
index 00000000..23111da7
--- /dev/null
+++ b/tests/Examples/Transport/Receiver/CollectionReceiverTest.php
@@ -0,0 +1,192 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Flow\Test\Examples\Transport\Receiver;
+
+use ArrayObject;
+use Flow\Examples\Transport\Receiver\CollectionReceiver;
+use PHPUnit\Framework\TestCase;
+use SplObjectStorage;
+use stdClass;
+use Symfony\Component\Messenger\Envelope;
+use Symfony\Component\Messenger\Stamp\TransportMessageIdStamp;
+use Symfony\Component\Messenger\Transport\Receiver\ReceiverInterface;
+
+use function is_array;
+
+class CollectionReceiverTest extends TestCase
+{
+    /**
+     * @param array<ReceiverInterface>                             $receivers
+     * @param SplObjectStorage<ReceiverInterface, array<Envelope>> $expectedReceiversIps
+     *
+     * @dataProvider receiverProvider
+     */
+    public function testGet($receivers, $expectedReceiversIps): void
+    {
+        $collectionReceiver = new CollectionReceiver($receivers);
+        $envelopes = $collectionReceiver->get();
+
+        $expectedIpIds = [];
+        foreach ($expectedReceiversIps as $receiver) {
+            $expectedIps = $expectedReceiversIps[$receiver];
+            foreach ($expectedIps as $envelope) {
+                $expectedIpIds[] = $this->getTransportMessageId($envelope);
+            }
+        }
+        $envelopeIds = array_map(function (Envelope $envelope) {
+            return $this->getTransportMessageId($envelope);
+        }, iterator_to_array($envelopes));
+
+        $this->assertArraySimilar($expectedIpIds, $envelopeIds);
+    }
+
+    /**
+     * @param array<ReceiverInterface>                             $receivers
+     * @param SplObjectStorage<ReceiverInterface, array<Envelope>> $expectedReceiversIps
+     * @param array<mixed, ReceiverInterface>                      $expectedAckIpsReceivers
+     * @param array<mixed, ReceiverInterface>                      $expectedRejectIpsReceivers
+     *
+     * @dataProvider receiverProvider
+     */
+    public function testAckAndReject($receivers, $expectedReceiversIps, $expectedAckIpsReceivers, $expectedRejectIpsReceivers): void
+    {
+        $collectionReceiver = new CollectionReceiver($receivers);
+
+        $envelopes = $collectionReceiver->get();
+        foreach ($envelopes as $envelope) {
+            $envelopeId = $this->getTransportMessageId($envelope);
+            $expectedReceiver = null;
+            foreach ($expectedReceiversIps as $receiver) {
+                $expectedIps = $expectedReceiversIps[$receiver];
+                foreach ($expectedIps as $expectedIp) {
+                    $expectedIpId = $this->getTransportMessageId($expectedIp);
+                    if ($envelopeId === $expectedIpId) {
+                        $expectedReceiver = $receiver;
+
+                        break 2;
+                    }
+                }
+            }
+            self::assertNotNull($expectedReceiver);
+
+            if (1 === random_int(0, 1)) {
+                $collectionReceiver->ack($envelope);
+                self::assertArrayHasKey($envelopeId, $expectedAckIpsReceivers);
+                self::assertSame($expectedReceiver, $expectedAckIpsReceivers[$envelopeId]);
+            } else {
+                $collectionReceiver->reject($envelope);
+                self::assertArrayHasKey($envelopeId, $expectedRejectIpsReceivers);
+                self::assertSame($expectedReceiver, $expectedRejectIpsReceivers[$envelopeId]);
+            }
+        }
+    }
+
+    /**
+     * @return array<array<mixed>>
+     */
+    public static function receiverProvider(): iterable
+    {
+        $expectedReceiversIps = new SplObjectStorage();
+        /** @var array<mixed, ReceiverInterface> $expectedAckIpsReceivers */
+        $expectedAckIpsReceivers = new ArrayObject();
+        /** @var array<mixed, ReceiverInterface> $expectedRejectIpsReceivers */
+        $expectedRejectIpsReceivers = new ArrayObject();
+        $receivers = [];
+        for ($i = 0; $i < 10; $i++) {
+            $envelopes = [];
+            for ($j = 0; $j < 3; $j++) {
+                $envelopes[] = Envelope::wrap(new stdClass(), [new TransportMessageIdStamp(uniqid('envelope_', true))]);
+            }
+
+            $receiver = new class($envelopes, $expectedAckIpsReceivers, $expectedRejectIpsReceivers) implements ReceiverInterface {
+                /**
+                 * @param array<Envelope>                 $envelopes
+                 * @param array<mixed, ReceiverInterface> $expectedAckIpsReceivers
+                 * @param array<mixed, ReceiverInterface> $expectedRejectIpsReceivers
+                 */
+                public function __construct(private $envelopes, private $expectedAckIpsReceivers, private $expectedRejectIpsReceivers) {}
+
+                public function get(): iterable
+                {
+                    foreach ($this->envelopes as $envelope) {
+                        yield $envelope;
+                    }
+                }
+
+                /**
+                 * @return array<mixed, ReceiverInterface>
+                 */
+                public function getExpectedAckIpsReceivers()
+                {
+                    return $this->expectedAckIpsReceivers;
+                }
+
+                /**
+                 * @return array<mixed, ReceiverInterface>
+                 */
+                public function getExpectedRejectIpsReceivers()
+                {
+                    return $this->expectedRejectIpsReceivers;
+                }
+
+                public function ack(Envelope $envelope): void
+                {
+                    $id = $this->getTransportMessageId($envelope);
+                    $this->expectedAckIpsReceivers[$id] = $this;
+                }
+
+                public function reject(Envelope $envelope): void
+                {
+                    $id = $this->getTransportMessageId($envelope);
+                    $this->expectedRejectIpsReceivers[$id] = $this;
+                }
+
+                private function getTransportMessageId(Envelope $envelope): string
+                {
+                    /** @var null|TransportMessageIdStamp $stamp */
+                    $stamp = $envelope->last(TransportMessageIdStamp::class);
+
+                    return $stamp ? $stamp->getId() : '';
+                }
+            };
+            $expectedReceiversIps->offsetSet($receiver, $envelopes);
+            $receivers[] = $receiver;
+        }
+
+        return [
+            [$receivers, $expectedReceiversIps, $expectedAckIpsReceivers, $expectedRejectIpsReceivers],
+        ];
+    }
+
+    /**
+     * Asserts that two associative arrays are similar.
+     *
+     * Both arrays must have the same indexes with identical values
+     * without respect to key ordering
+     *
+     * @param array<mixed, mixed> $expected
+     * @param array<mixed, mixed> $array
+     */
+    protected function assertArraySimilar(array $expected, array $array): void
+    {
+        self::assertSame([], array_diff_key($array, $expected));
+
+        foreach ($expected as $key => $value) {
+            if (is_array($value)) {
+                self::assertArraySimilar($value, $array[$key]);
+            } else {
+                self::assertContains($value, $array);
+            }
+        }
+    }
+
+    private function getTransportMessageId(Envelope $envelope): string
+    {
+        /** @var null|TransportMessageIdStamp $stamp */
+        $stamp = $envelope->last(TransportMessageIdStamp::class);
+
+        return $stamp ? $stamp->getId() : '';
+    }
+}
diff --git a/tests/Examples/Transport/Sender/CollectionSenderTest.php b/tests/Examples/Transport/Sender/CollectionSenderTest.php
new file mode 100644
index 00000000..cd465e5c
--- /dev/null
+++ b/tests/Examples/Transport/Sender/CollectionSenderTest.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Flow\Test\Examples\Transport\Sender;
+
+use ArrayObject;
+use Flow\Examples\Transport\Sender\CollectionSender;
+use PHPUnit\Framework\TestCase;
+use stdClass;
+use Symfony\Component\Messenger\Envelope;
+use Symfony\Component\Messenger\Transport\Sender\SenderInterface;
+
+class CollectionSenderTest extends TestCase
+{
+    public function testSend(): void
+    {
+        $counter = new ArrayObject(['send' => 0]);
+        $senders = array_map(function () use ($counter) {
+            return new class($counter) implements SenderInterface {
+                /**
+                 * @param ArrayObject<string, int> $counter
+                 */
+                public function __construct(private ArrayObject $counter) {}
+
+                public function send(Envelope $envelope): Envelope
+                {
+                    $this->counter['send']++;
+
+                    return $envelope;
+                }
+            };
+        }, array_fill(0, 10, 0));
+        $collectionSender = new CollectionSender($senders);
+        $collectionSender->send(new Envelope(new stdClass()));
+
+        self::assertSame(10, $counter['send']);
+    }
+}