diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index 9333d81..2c809fa 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3']
     steps:
     - name: Checkout
       uses: actions/checkout@v2
@@ -19,6 +19,8 @@ jobs:
       uses: shivammathur/setup-php@v2
       with:
         php-version: ${{ matrix.php-versions }}
+        extensions: mongodb-1.15.0
+
     - name: Install MongoDB
       uses: supercharge/mongodb-github-action@1.8.0
       with:
diff --git a/tests/QueueTest.php b/tests/QueueTest.php
index e3ee430..07d4364 100644
--- a/tests/QueueTest.php
+++ b/tests/QueueTest.php
@@ -378,7 +378,7 @@ public function earliestGet()
 
         $this->assertSame([], $this->queue->get($messageOne->getPayload()));
 
-        sleep(1);
+        sleep(2);
 
         $this->assertCount(1, $this->queue->get($messageOne->getPayload()));
     }
@@ -450,6 +450,8 @@ public function requeue()
 
         $this->assertSameMessage($messages[0], $message);
 
+        sleep(1);
+
         $this->queue->requeue($message->withEarliestGet(new UTCDateTime((int)(microtime(true) * 1000))));
 
         $actual = $this->queue->get([], ['maxNumberOfMessages' => 10]);