diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 514e9b5..a29dda2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Install Dependencies
         uses: ramsey/composer-install@v2
       - name: Run PHPStan
-        run: ./vendor/bin/phpstan analyze src --level 0
+        run: ./vendor/bin/phpstan analyze src --level 5
   test:
     name: "Run Tests on PHP ${{ matrix.php }} against RabbitMQ ${{ matrix.rabbitmq }} (Composer: ${{ matrix.composer }}; TLS: ${{ matrix.ssl_test }})"
     runs-on: ubuntu-latest
diff --git a/src/Connection.php b/src/Connection.php
index bc039ba..a04035a 100644
--- a/src/Connection.php
+++ b/src/Connection.php
@@ -339,13 +339,7 @@ public function awaitConnectionClose(): Protocol\MethodConnectionCloseFrame
         $deferred = new Deferred();
         $this->awaitList[] = [
             'filter' => function (Protocol\AbstractFrame $frame): bool {
-                if ($frame instanceof Protocol\MethodConnectionCloseFrame) {
-                    return true;
-                } elseif ($frame instanceof Protocol\MethodConnectionCloseFrame) {
-                    $this->connectionCloseOk();
-                    throw new ClientException($frame->replyText, $frame->replyCode);
-                }
-                return false;
+                return $frame instanceof Protocol\MethodConnectionCloseFrame;
           },
           'promise' => $deferred,
         ];