diff --git a/src/Store/ArrayStream.php b/src/Store/ArrayStream.php
index 4fd62dce..2dab7428 100644
--- a/src/Store/ArrayStream.php
+++ b/src/Store/ArrayStream.php
@@ -14,8 +14,8 @@
 /** @implements IteratorAggregate<Message> */
 final class ArrayStream implements Stream, IteratorAggregate
 {
-    /** @var Iterator<Message> $iterator */
-    private readonly Iterator $iterator;
+    /** @var Iterator<Message>|null $iterator */
+    private Iterator|null $iterator;
 
     /** @var positive-int|0|null */
     private int|null $position;
@@ -33,17 +33,26 @@ public function __construct(array $messages = [])
 
     public function close(): void
     {
+        $this->iterator = null;
     }
 
     /** @return Traversable<Message> */
     public function getIterator(): Traversable
     {
+        if ($this->iterator === null) {
+            throw new StreamClosed();
+        }
+
         return $this->iterator;
     }
 
     /** @return positive-int|0|null */
     public function position(): int|null
     {
+        if ($this->iterator === null) {
+            throw new StreamClosed();
+        }
+
         if ($this->position === null) {
             $this->iterator->key();
         }
@@ -58,6 +67,10 @@ public function position(): int|null
      */
     public function index(): int|null
     {
+        if ($this->iterator === null) {
+            throw new StreamClosed();
+        }
+
         if ($this->index === null) {
             $this->iterator->key();
         }
@@ -67,16 +80,28 @@ public function index(): int|null
 
     public function next(): void
     {
+        if ($this->iterator === null) {
+            throw new StreamClosed();
+        }
+
         $this->iterator->next();
     }
 
     public function end(): bool
     {
+        if ($this->iterator === null) {
+            throw new StreamClosed();
+        }
+
         return !$this->iterator->valid();
     }
 
     public function current(): Message|null
     {
+        if ($this->iterator === null) {
+            throw new StreamClosed();
+        }
+
         return $this->iterator->current() ?: null;
     }
 
diff --git a/src/Subscription/Engine/DefaultSubscriptionEngine.php b/src/Subscription/Engine/DefaultSubscriptionEngine.php
index 8cb1b160..dcf5166d 100644
--- a/src/Subscription/Engine/DefaultSubscriptionEngine.php
+++ b/src/Subscription/Engine/DefaultSubscriptionEngine.php
@@ -347,6 +347,7 @@ function (array $subscriptions) use ($limit): void {
                         }
                     }
                 } finally {
+                    $endIndex = $stream?->index();
                     $stream?->close();
 
                     if ($messageCounter > 0) {
@@ -381,7 +382,7 @@ function (array $subscriptions) use ($limit): void {
                 $this->logger?->info(
                     sprintf(
                         'Subscription Engine: End of stream on position "%d" has been reached, finish processing.',
-                        $stream->index() ?: 'unknown',
+                        $endIndex ?: 'unknown',
                     ),
                 );
             },
diff --git a/tests/Unit/Store/ArrayStreamTest.php b/tests/Unit/Store/ArrayStreamTest.php
index 5bab74a7..e6921a6e 100644
--- a/tests/Unit/Store/ArrayStreamTest.php
+++ b/tests/Unit/Store/ArrayStreamTest.php
@@ -6,6 +6,7 @@
 
 use Patchlevel\EventSourcing\Message\Message;
 use Patchlevel\EventSourcing\Store\ArrayStream;
+use Patchlevel\EventSourcing\Store\StreamClosed;
 use Patchlevel\EventSourcing\Tests\Unit\Fixture\Email;
 use Patchlevel\EventSourcing\Tests\Unit\Fixture\ProfileCreated;
 use Patchlevel\EventSourcing\Tests\Unit\Fixture\ProfileId;
@@ -139,6 +140,8 @@ public function testWithNoList(): void
 
     public function testClose(): void
     {
+        $this->expectException(StreamClosed::class);
+
         $message = Message::create(
             new ProfileCreated(
                 ProfileId::fromString('foo'),
@@ -156,10 +159,6 @@ public function testClose(): void
         self::assertSame(false, $stream->end());
 
         $stream->close();
-
-        self::assertSame(1, $stream->index());
-        self::assertSame(0, $stream->position());
-        self::assertSame($message, $stream->current());
-        self::assertSame(false, $stream->end());
+        $stream->index();
     }
 }
diff --git a/tests/Unit/Subscription/Engine/DefaultSubscriptionEngineTest.php b/tests/Unit/Subscription/Engine/DefaultSubscriptionEngineTest.php
index e447795e..e6ce5068 100644
--- a/tests/Unit/Subscription/Engine/DefaultSubscriptionEngineTest.php
+++ b/tests/Unit/Subscription/Engine/DefaultSubscriptionEngineTest.php
@@ -33,6 +33,7 @@
 use PHPUnit\Framework\TestCase;
 use Prophecy\Argument;
 use Prophecy\PhpUnit\ProphecyTrait;
+use Psr\Log\NullLogger;
 use RuntimeException;
 
 /** @covers \Patchlevel\EventSourcing\Subscription\Engine\DefaultSubscriptionEngine */
@@ -51,6 +52,7 @@ public function testNothingToSetup(): void
             $streamableStore->reveal(),
             $store,
             new MetadataSubscriberAccessorRepository([]),
+            logger: new NullLogger(),
         );
 
         $engine->setup();
@@ -77,6 +79,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->setup();
@@ -125,6 +128,7 @@ public function create(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->setup();
@@ -180,6 +184,7 @@ public function create(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->setup();
@@ -228,6 +233,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->setup(null, true);
@@ -267,6 +273,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->setup();
@@ -305,6 +312,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->setup();
@@ -331,6 +339,7 @@ public function testNothingToBoot(): void
             $streamableStore->reveal(),
             $store,
             new MetadataSubscriberAccessorRepository([]),
+            logger: new NullLogger(),
         );
 
         $engine->boot();
@@ -355,6 +364,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->boot();
@@ -403,6 +413,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->boot();
@@ -461,6 +472,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->boot(new SubscriptionEngineCriteria(), 1);
@@ -531,6 +543,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber1, $subscriber2]),
+            logger: new NullLogger(),
         );
 
         $engine->boot();
@@ -604,6 +617,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->boot();
@@ -660,6 +674,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->boot();
@@ -698,6 +713,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -744,6 +760,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -797,6 +814,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->run(new SubscriptionEngineCriteria(), 1);
@@ -865,6 +883,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber1, $subscriber2]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -925,6 +944,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -968,6 +988,7 @@ public function testRunningMarkOutdated(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -1003,6 +1024,7 @@ public function testRunningWithoutActiveSubscribers(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -1044,6 +1066,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -1093,6 +1116,7 @@ public function handle(Message $message): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->run();
@@ -1131,6 +1155,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->teardown();
@@ -1167,6 +1192,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->teardown();
@@ -1205,6 +1231,7 @@ public function drop(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->teardown();
@@ -1244,6 +1271,7 @@ public function drop(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->teardown();
@@ -1271,6 +1299,7 @@ public function testTeardownWithoutSubscriber(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([]),
+            logger: new NullLogger(),
         );
 
         $engine->teardown();
@@ -1293,6 +1322,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->remove();
@@ -1335,6 +1365,7 @@ public function drop(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->remove();
@@ -1365,6 +1396,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->remove();
@@ -1401,6 +1433,7 @@ public function drop(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->remove();
@@ -1427,6 +1460,7 @@ public function testRemoveWithoutSubscriber(): void
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([]),
+            logger: new NullLogger(),
         );
 
         $engine->remove();
@@ -1449,6 +1483,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->reactivate();
@@ -1487,6 +1522,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->reactivate();
@@ -1524,6 +1560,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->reactivate();
@@ -1560,6 +1597,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->reactivate();
@@ -1596,6 +1634,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->reactivate();
@@ -1624,6 +1663,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->pause();
@@ -1660,6 +1700,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->pause();
@@ -1696,6 +1737,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->pause();
@@ -1734,6 +1776,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->pause();
@@ -1764,6 +1807,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $subscriptions = $engine->subscriptions();
@@ -1823,6 +1867,7 @@ public function subscribe(): void
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
             $retryStrategy->reveal(),
+            new NullLogger(),
         );
 
         $engine->run();
@@ -1875,6 +1920,7 @@ class {
             $subscriptionStore,
             new MetadataSubscriberAccessorRepository([$subscriber]),
             $retryStrategy->reveal(),
+            new NullLogger(),
         );
 
         $engine->run();
@@ -1909,6 +1955,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore->reveal(),
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engineCriteria = new SubscriptionEngineCriteria(
@@ -1949,6 +1996,7 @@ class {
             $streamableStore->reveal(),
             $subscriptionStore->reveal(),
             new MetadataSubscriberAccessorRepository([$subscriber]),
+            logger: new NullLogger(),
         );
 
         $engine->{$method}();