diff --git a/composer.json b/composer.json
index bbba66ae8..7220bbc35 100644
--- a/composer.json
+++ b/composer.json
@@ -38,6 +38,9 @@
         "psr-4": { "SellingPartnerApi\\" : "lib/" }
     },
     "autoload-dev": {
-        "psr-4": { "SellingPartnerApi\\Tests\\" : "tests/" }
+        "psr-4": { "SellingPartnerApi\\Tests\\" : "test/" }
+    },
+    "scripts": {
+        "test": "vendor/bin/phpunit"
     }
 }
diff --git a/lib/ApiException.php b/lib/ApiException.php
index da26dc9eb..8e61cb47a 100644
--- a/lib/ApiException.php
+++ b/lib/ApiException.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * ApiException
- * PHP version 7.2
+ * PHP version 7.3
  *
  * @category Class
  * @package  SellingPartnerApi
diff --git a/lib/Configuration.php b/lib/Configuration.php
index 9bbfa1fdb..83447acc9 100644
--- a/lib/Configuration.php
+++ b/lib/Configuration.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * Configuration
- * PHP version 7.2
+ * PHP version 7.3
  *
  * @category Class
  * @package  SellingPartnerApi
@@ -23,7 +23,7 @@
 
 /**
  * Configuration Class Doc Comment
- * PHP version 7.2
+ * PHP version 7.3
  *
  * @category Class
  * @package  SellingPartnerApi
@@ -56,7 +56,7 @@ class Configuration
      *
      * @var string
      */
-    protected $userAgent = 'jlevers/selling-partner-api/5.0.3 (Language=PHP)';
+    protected $userAgent = 'jlevers/selling-partner-api/5.1.0 (Language=PHP)';
 
     /**
      * Debug switch (default set to false)
@@ -122,7 +122,7 @@ public function __construct(array $configurationOptions)
         $this->endpoint = $options["endpoint"];
         $this->auth = new Authentication($options);
 
-        $this->setRequestSigner($options['requestSigner'] ?? $this->auth);
+        $this->setRequestSigner($options["requestSigner"] ?? $this->auth);
     }
 
     public function getRequestSigner(): RequestSignerContract
diff --git a/lib/HeaderSelector.php b/lib/HeaderSelector.php
index de1a56d85..8a7eda121 100644
--- a/lib/HeaderSelector.php
+++ b/lib/HeaderSelector.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * ApiException
- * PHP version 7.2
+ * PHP version 7.3
  *
  * @category Class
  * @package  SellingPartnerApi
diff --git a/lib/Model/ModelInterface.php b/lib/Model/ModelInterface.php
index 50c7a6801..c9f1ebb9a 100644
--- a/lib/Model/ModelInterface.php
+++ b/lib/Model/ModelInterface.php
@@ -2,7 +2,7 @@
 /**
  * ModelInterface
  *
- * PHP version 7.2
+ * PHP version 7.3
  *
  * @category Class
  * @package  SellingPartnerApi\Model
diff --git a/phpunit.xml b/phpunit.xml
index 5b0f6ca2c..6e5e83a84 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -21,7 +21,7 @@
     </coverage>
     <testsuites>
         <testsuite name="Unit">
-            <directory suffix="Test.php">tests</directory>
+            <directory suffix="Test.php">test</directory>
         </testsuite>
     </testsuites>
-</phpunit>
\ No newline at end of file
+</phpunit>
diff --git a/tests/AuthenticationTest.php b/test/AuthenticationTest.php
similarity index 100%
rename from tests/AuthenticationTest.php
rename to test/AuthenticationTest.php
diff --git a/tests/AuthorizationSignerTest.php b/test/AuthorizationSignerTest.php
similarity index 100%
rename from tests/AuthorizationSignerTest.php
rename to test/AuthorizationSignerTest.php
diff --git a/tests/RequestSignerTest.php b/test/RequestSignerTest.php
similarity index 100%
rename from tests/RequestSignerTest.php
rename to test/RequestSignerTest.php