diff --git a/README.md b/README.md
index f0ecb2f..dfcbe5a 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,12 @@ Note: Plugin folder is case-sensitive.
 Use Sendgrid to send emails
 ---------------------------
 
+### Configuration with the user interface
+
+Set your API credentials on the settings page and set the mail transport to "sendgrid".
+
+### Configuration with the config file
+
 Define those constants in your `config.php` file to send notifications with Sendgrid:
 
 ```php
diff --git a/Test/EmailHandlerTest.php b/Test/EmailHandlerTest.php
index 5a4fe4c..28067ed 100644
--- a/Test/EmailHandlerTest.php
+++ b/Test/EmailHandlerTest.php
@@ -15,7 +15,7 @@ public function testSendEmail()
     {
         $this->container['httpClient']
             ->expects($this->once())
-            ->method('postForm')
+            ->method('postFormAsync')
             ->with(
                 'https://api.sendgrid.com/api/mail.send.json',
                 $this->anything(),