diff --git a/src/Adapter/Builder/AbstractAdapterDefinitionBuilder.php b/src/Adapter/Builder/AbstractAdapterDefinitionBuilder.php
index f608887..355dc51 100644
--- a/src/Adapter/Builder/AbstractAdapterDefinitionBuilder.php
+++ b/src/Adapter/Builder/AbstractAdapterDefinitionBuilder.php
@@ -55,11 +55,6 @@ private function ensureRequiredPackagesAvailable()
             return;
         }
 
-        throw new MissingPackageException(sprintf(
-            "Missing package%s, to use the \"%s\" adapter, run:\n\ncomposer require %s",
-            \count($missingPackages) > 1 ? 's' : '',
-            $this->getName(),
-            implode(' ', $missingPackages)
-        ));
+        throw new MissingPackageException(sprintf("Missing package%s, to use the \"%s\" adapter, run:\n\ncomposer require %s", \count($missingPackages) > 1 ? 's' : '', $this->getName(), implode(' ', $missingPackages)));
     }
 }
diff --git a/src/Adapter/Builder/AdapterDefinitionBuilderInterface.php b/src/Adapter/Builder/AdapterDefinitionBuilderInterface.php
index 2f9eca1..d36615a 100644
--- a/src/Adapter/Builder/AdapterDefinitionBuilderInterface.php
+++ b/src/Adapter/Builder/AdapterDefinitionBuilderInterface.php
@@ -24,10 +24,6 @@ public function getName(): string;
 
     /**
      * Create the definition for this builder's adapter given an array of options.
-     *
-     * @param array $options
-     *
-     * @return Definition
      */
     public function createDefinition(array $options): Definition;
 }
diff --git a/tests/DependencyInjection/FlysystemExtensionTest.php b/tests/DependencyInjection/FlysystemExtensionTest.php
index d3c9076..ce5d39d 100644
--- a/tests/DependencyInjection/FlysystemExtensionTest.php
+++ b/tests/DependencyInjection/FlysystemExtensionTest.php
@@ -11,6 +11,7 @@
 
 namespace Tests\League\FlysystemBundle\DependencyInjection;
 
+use AsyncAws\S3\S3Client as AsyncS3Client;
 use Aws\S3\S3Client;
 use Google\Cloud\Storage\Bucket;
 use Google\Cloud\Storage\StorageClient;
@@ -28,6 +29,7 @@ class FlysystemExtensionTest extends TestCase
     public function provideFilesystems()
     {
         $fsNames = [
+            'fs_asyncaws',
             'fs_aws',
             'fs_azure',
             'fs_cache',
@@ -105,6 +107,7 @@ private function getClientMocks()
 
         return [
             'aws_client_service' => $this->createMock(S3Client::class),
+            'asyncaws_client_service' => $this->createMock(AsyncS3Client::class),
             'azure_client_service' => $this->createMock(BlobRestProxy::class),
             'dropbox_client_service' => $this->createMock(DropboxClient::class),
             'gcloud_client_service' => $gcloud,
diff --git a/tests/Kernel/config/flysystem.yaml b/tests/Kernel/config/flysystem.yaml
index 2ebbd88..05ac7e1 100644
--- a/tests/Kernel/config/flysystem.yaml
+++ b/tests/Kernel/config/flysystem.yaml
@@ -1,5 +1,12 @@
 flysystem:
     storages:
+        fs_asyncaws:
+            adapter: 'asyncaws'
+            options:
+                client: 'asyncaws_client_service'
+                bucket: '%env(AWS_BUCKET)%'
+                prefix: 'optional/path/prefix'
+
         fs_aws:
             adapter: 'aws'
             options:
diff --git a/tests/Kernel/config/services.yaml b/tests/Kernel/config/services.yaml
index 28634a6..d22b004 100644
--- a/tests/Kernel/config/services.yaml
+++ b/tests/Kernel/config/services.yaml
@@ -6,6 +6,7 @@ services:
         class: 'League\Flysystem\Adapter\NullAdapter'
 
     # Aliases used to test the services construction
+    flysystem.test.fs_asyncaws: { alias: 'fs_asyncaws' }
     flysystem.test.fs_aws: { alias: 'fs_aws' }
     flysystem.test.fs_azure: { alias: 'fs_azure' }
     flysystem.test.fs_cache: { alias: 'fs_cache' }